Thomas Jefferson University

Laurence Parker

TitleVolunteer Faculty
InstitutionThomas Jefferson University
DepartmentRadiology - Thomas Jefferson University
Address1025 Walnut Street
Philadelphia PA 19107
Phone2159554218
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Funk EM, Dear GL, Moya-Mendez ME, Landstrom AP, Breglio A, Parker LE, Boggs A, Prange L, Barstow L, Mikati MA. Critical Events in Patients With Alternating Hemiplegia of Childhood: A Cohort Study Subgroup Analysis. AANA J. 2025 Feb 01; 93(1):19-29. PMID: 39945148.
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    2. Atsina KB, Cox M, Sedora Roman NI, Pukenas B, Parker L, Levin DC, Hurst RW. Vascular imaging of the spine in the US Medicare population: Catheter and MR angiography volumes from 2004 to 2016. Neuroradiol J. 2020 Jun 12; 1971400920932488. PMID: 32529967.
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    3. Guez D, Hansberry DR, Gonsalves CF, Eschelman DJ, Parker L, Rao VM, Levin DC. Recent Trends in Endovascular and Surgical Treatment of Peripheral Arterial Disease in the Medicare Population. AJR Am J Roentgenol. 2020 Feb 25; 1-5. PMID: 32097027.
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    4. Kamel SI, Parker L, Rao V, Levin DC. Recent Trends in Medicare Reimbursements to Nonradiologist Physicians for In-Office MRI and CT. J Am Coll Radiol. 2020 Jan; 17(1 Pt B):118-124. PMID: 31918867.
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    5. Hong AS, Levin D, Parker L, Rao VM, Ross-Degnan D, Wharam JF. Trends in Diagnostic Imaging Utilization among Medicare and Commercially Insured Adults from 2003 through 2016. Radiology. 2019 Dec 31; 191116. PMID: 31891320.
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    6. Atsina KB, Parker L, Rao VM, Levin DC. JOURNAL CLUB: Advanced Imaging Interpretation by Radiologists and Nonradiologist Physicians: A Training Issue. AJR Am J Roentgenol. 2019 Nov 06; 1-7. PMID: 31691611.
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    7. Selvarajan SK, Levin DC, Parker L. The Increasing Use of Emergency Department Imaging in the United States: Is It Appropriate? AJR Am J Roentgenol. 2019 Jun 25; 1-5. PMID: 31237433.
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    8. Kamel SI, Intenzo CM, Parker L, Rao V, Levin DC. Recent Trends Suggest Possible Inappropriate Utilization of Myocardial Perfusion Imaging. J Am Coll Radiol. 2019 Aug; 16(8):1013-1017. PMID: 31092340.
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    9. Cox M, Atsina KB, Sedora-Roman NI, Pukenas BA, Parker L, Levin DC, Bagley LJ, Hurst RW. Neurointerventional Radiology for the Aspiring Radiology Resident: Current State of the Field and Future Directions. AJR Am J Roentgenol. 2019 Jan 30; 1-6. PMID: 30699013.
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    10. Levin DC, Parker L, Halpern EJ, Rao VM. Coronary CT Angiography: Reversal of Earlier Utilization Trends. J Am Coll Radiol. 2018 Aug 26. PMID: 30158087.
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    11. Nazarian LN, Parker L, Levin DC. Letter to the Editor regarding Gyftopoulos et al: "Cost-effectiveness of magnetic resonance imaging versus ultrasound for the detection of symptomatic full-thickness supraspinatus tendon tears". J Shoulder Elbow Surg. 2018 Oct; 27(10):e318-e319. PMID: 30093230.
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    12. Boroumand G, Teberian I, Parker L, Rao VM, Levin DC. Screening Mammography and Digital Breast Tomosynthesis: Utilization Updates. AJR Am J Roentgenol. 2018 Mar 23; 1-5. PMID: 29570370.
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    13. Mizrahi DJ, Parker L, Zoga AM, Levin DC. National Trends in the Utilization of Skeletal Radiography From 2003 to 2015. J Am Coll Radiol. 2018 Mar 23. PMID: 29580717.
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    14. Levin DC, Parker L, Rao VM. The Percent Share of All Medicare Payments to Physicians That Is Attributable to Noninvasive Diagnostic Imaging. J Am Coll Radiol. 2018 Feb 22. PMID: 29483052.
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    15. Levin DC, Parker L, Halpern EJ, Rao VM. Coronary CT Angiography: Use in Patients With Chest Pain Presenting to Emergency Departments. AJR Am J Roentgenol. 2018 Apr; 210(4):816-820. PMID: 29446681.
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    16. Mizrahi DJ, Nazarian LN, Parker L. Evaluation of the Anterior Talofibular Ligament via Stress Sonography in Asymptomatic and Symptomatic Populations. J Ultrasound Med. 2018 Jan 24. PMID: 29363788.
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    17. Guez D, Hansberry DR, Eschelman DJ, Gonsalves CF, Parker L, Rao VM, Levin DC. Inferior Vena Cava Filter Placement and Retrieval Rates among Radiologists and Nonradiologists. J Vasc Interv Radiol. 2018 Jan 03. PMID: 29305114.
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    18. Kanesa-Thasan RM, Nazarian LN, Parker L, Rao VM, Levin DC. Comparative Trends in Utilization of MRI and Ultrasound to Evaluate Nonspine Joint Disease 2003 to 2015. J Am Coll Radiol. 2018 Mar; 15(3 Pt A):402-407. PMID: 29246525.
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    19. Levin DC, Parker L, Rao VM. The Recent Losses in Medicare Imaging Revenues Experienced by Radiologists, Cardiologists, and Other Physicians. J Am Coll Radiol. 2017 Aug; 14(8):1007-1012. PMID: 28462866.
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    20. Levin DC, Parker L, Palit CD, Rao VM. After Nearly A Decade Of Rapid Growth, Use And Complexity Of Imaging Declined, 2008-14. Health Aff (Millwood). 2017 Apr 01; 36(4):663-670. PMID: 28373332.
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    21. Parker LM, Yazer MH, Waters JH. Metallosis Identified via Intraoperative Cell Salvage: A Case Report. A A Case Rep. 2017 Feb 15; 8(4):67-69. PMID: 28195859.
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    22. Becker-Weidman DJ, Malhotra N, Reilly DF, Selvam N, Parker L, Nazarian LN. Imaging Surveillance in Patients After a Benign Fine-Needle Aspiration Biopsy of the Thyroid: Associated Cost and Incidence of Subsequent Cancer. AJR Am J Roentgenol. 2016 Dec 08; 1-4. PMID: 27929675.
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    23. Kamel SI, Levin DC, Parker L, Rao VM. Utilization Trends in Noncardiac Thoracic Imaging, 2002-2014. J Am Coll Radiol. 2016 Dec 04. PMID: 27927591.
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    24. Levin DC, Parker L, Rao VM. Recent Trends in Imaging Use in Hospital Settings: Implications for Future Planning. J Am Coll Radiol. 2016 Nov 21. PMID: 27884633.
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    25. Sharpe RE, Levin DC, Parker L, Rao VM. The Effect of the Controversial US Preventive Services Task Force Recommendations on the Use of Screening Mammography. J Am Coll Radiol. 2016 Nov; 13(11S):e58-e61. PMID: 27814825.
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    26. Becker-Weidman D, Civan JM, Deshmukh SP, Roth CG, Herrine SK, Parker L, Mitchell DG. Hepatocellular carcinoma after locoregional therapy: Magnetic resonance imaging findings in falsely negative exams. World J Hepatol. 2016 Jun 8; 8(16):685-90. PMID: 27326315.
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    27. Chi AS, Long SS, Zoga AC, Parker L, Morrison WB. Association of Gluteus Medius and Minimus Muscle Atrophy and Fall-Related Hip Fracture in Older Individuals Using Computed Tomography. J Comput Assist Tomogr. 2016 Mar-Apr; 40(2):238-42. PMID: 26571058.
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    28. Levin DC, Parker L, Halpern EJ, Rao VM. Recent Trends in Imaging for Suspected Coronary Artery Disease: What Is the Best Approach? J Am Coll Radiol. 2016 Apr; 13(4):381-6. PMID: 26774887.
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    29. Intenzo CM, Parker L, Levin DC, Kim SM, Rao VM. Provider Distribution Changes in Dual-Energy X-Ray Absorptiometry in the Medicare Population Over the Past Decade. J Clin Densitom. 2016 Jul-Sep; 19(3):266-9. PMID: 26670626.
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    30. Levin DC, Eschelman D, Parker L, Rao VM. Trends in Use of Percutaneous Versus Open Surgical Drainage of Abdominal Abscesses. J Am Coll Radiol. 2015 Dec; 12(12 Pt A):1247-50. PMID: 26653832.
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    31. Cox M, Levin DC, Parker L, Morrison W, Long S, Rao VM. Vertebral Augmentation After Recent Randomized Controlled Trials: A New Rise in Kyphoplasty Volumes. J Am Coll Radiol. 2016 Jan; 13(1):28-32. PMID: 26546300.
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    32. Levin DC, Gardiner GA, Parker L, Rao VM. Vascular Ultrasound and Noninvasive Physiological Testing for Peripheral Arterial Disease: Are These Tests Being Overused? J Am Coll Radiol. 2016 Mar; 13(3):249-54. PMID: 26603096.
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    33. Rapoport RJ, Parker L, Levin DC, Hiatt MD. A Large State Medicaid Outpatient Advanced Imaging Utilization Management Program: Substantial Savings Without the Need for Denials. Med Care Res Rev. 2016 Jun; 73(3):369-80. PMID: 26416792.
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    34. Chi AS, Long SS, Zoga AC, Read PJ, Deely DM, Parker L, Morrison WB. Prevalence and pattern of gluteus medius and minimus tendon pathology and muscle atrophy in older individuals using MRI. Skeletal Radiol. 2015 Dec; 44(12):1727-33. PMID: 26260535.
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    35. Zohrabian VM, Parker L, Harrop JS, Vaccaro AR, Marino RJ, Flanders AE. Can anatomic level of injury on MRI predict neurological level in acute cervical spinal cord injury? Br J Neurosurg. 2016 Apr; 30(2):204-10. PMID: 26168300.
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    36. Cox M, Levin DC, Parker L, Rao VM. Relative Roles of Radiologists and Other Physicians in Percutaneous Endovascular Neurointerventions. J Am Coll Radiol. 2015 Oct; 12(10):1030-5. PMID: 26163052.
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    37. Patel MC, Levin DC, Parker L, Rao VM. Have CT and MR Angiography Replaced Catheter Angiography in Diagnosing Peripheral Arterial Disease? J Am Coll Radiol. 2015 Sep; 12(9):909-14. PMID: 26160043.
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    38. Patel BP, Levin DC, Parker L, Rao VM. The Shift in Outpatient Advanced Imaging From Private Offices to Hospital Facilities. J Am Coll Radiol. 2015 Oct; 12(10):1042-7. PMID: 26141227.
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    39. Guglielmo FF, Mitchell DG, O'Kane PL, Deshmukh SP, Roth CG, Burach I, Burns A, Dulka S, Parker L. Identifying decreased peristalsis of abnormal small bowel segments in Crohn's disease using cine MR enterography: the frozen bowel sign. Abdom Imaging. 2015 Jun; 40(5):1150-6. PMID: 25326259.
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    40. Guglielmo FF, Mitchell DG, O'Kane PL, Deshmukh SP, Roth CG, Burach I, Burns A, Dulka S, Parker L. Erratum to: Identifying decreased peristalsis of abnormal small bowel segments in Crohn's disease using cine MR enterography: the frozen bowel sign. Abdom Imaging. 2015 Jun; 40(5):1138-49. PMID: 25445157.
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    41. Levin DC, Rao VM, Parker L. Trends in outpatient MRI seem to reflect recent reimbursement cuts. J Am Coll Radiol. 2015 May; 12(5):463-6. PMID: 25448060.
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    42. Levin DC, Rao VM, Parker L, Frangos AJ. Continued growth in emergency department imaging is bucking the overall trends. J Am Coll Radiol. 2014 Nov; 11(11):1044-7. PMID: 25439619.
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    43. Levin DC, Rao VM, Parker L. Financial Impact of Medicare Code Bundling of CT of the Abdomen and Pelvis. AJR Am J Roentgenol. 2014 May; 202(5):1069-71. PMID: 24758662.
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    44. Levin DC, Parker L, Halpern EJ, Rao VM. Are Combined CT Scans of the Thorax Being Overused? J Am Coll Radiol. 2014 Aug; 11(8):788-90. PMID: 24768077.
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    45. Shen X, Showalter TN, Mishra MV, Barth S, Rao V, Levin D, Parker L. Radiation oncology services in the modern era: evolving patterns of usage and payments in the office setting for medicare patients from 2000 to 2010. J Oncol Pract. 2014 Jul; 10(4):e201-7. PMID: 24756145.
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    46. Ghobrial PM, Neuberger I, Guglielmo FF, Mitchell DG, Parker L, O'Kane PL, Roth CG, Deshmukh SP, Borowski A. Cine MR Enterography Grading of Small Bowel Peristalsis: Evaluation of the Antiperistaltic Effectiveness of Sublingual Hyoscyamine Sulfate. Acad Radiol. 2014 Jan; 21(1):86-91. PMID: 24331269.
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    47. Parker L, Nazarian LN, Gingold EL, Palit CD, Hoey CL, Frangos AJ. Cost and Radiation Savings of Partial Substitution of Ultrasound for CT in Appendicitis Evaluation: A National Projection. AJR Am J Roentgenol. 2014 Jan; 202(1):124-35. PMID: 24370137.
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    48. Levin DC, Parker L, Halpern EJ, Rao VM. The diversion of outpatient echocardiography from private offices to higher cost hospital facilities: an unanticipated effect of code bundling. J Am Coll Radiol. 2014 May; 11(5):477-80. PMID: 24321220.
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    49. Sharpe RE, Levin DC, Parker L, Rao VM. The increasing role of radiologists in thoracic diagnosis: more thoracic biopsies are performed percutaneously. J Am Coll Radiol. 2013 Oct; 10(10):770-3. PMID: 24091047.
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    50. Sharpe RE, Nazarian LN, Levin DC, Parker L, Rao VM. The increasing role of nonradiologists in performing ultrasound-guided invasive procedures. J Am Coll Radiol. 2013 Nov; 10(11):859-63. PMID: 24075858.
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    51. Levin DC, Rao VM, Parker L, Frangos AJ. Analysis of radiologists' imaging workload trends by place of service. J Am Coll Radiol. 2013 Oct; 10(10):760-3. PMID: 23632133.
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    52. Sharpe RE, Levin DC, Parker L, Rao VM. The Recent Reversal of the Growth Trend in MRI: A Harbinger of the Future? J Am Coll Radiol. 2013 Aug; 10(8):599-602. PMID: 23542023.
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    53. Petruzzi N, Mitchell D, Guglielmo F, O'Kane P, Deshmukh S, Roth C, Shortt C, Balfour S, Parker L. Hepatocellular carcinoma likelihood on MRI exams: evaluation of a standardized categorization system. Acad Radiol. 2013 Jun; 20(6):694-8. PMID: 23541479.
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    54. Levin DC, Parker L, Intenzo CM, Rao VM. Recent reimbursement changes and their effect on hospital and private office use of myocardial perfusion imaging. J Am Coll Radiol. 2013 Mar; 10(3):198-201. PMID: 23571060.
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    55. Nazarian LN, Jacobson JA, Benson CB, Bancroft LW, Bedi A, McShane JM, Miller TT, Parker L, Smith J, Steinbach LS, Teefey SA, Thiele RG, Tuite MJ, Wise JN, Yamaguchi K. Imaging algorithms for evaluating suspected rotator cuff disease: society of radiologists in ultrasound consensus conference statement. Radiology. 2013 May; 267(2):589-95. PMID: 23401583.
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    56. Sharpe RE, Levin DC, Parker L, Rao VM. The Effect of the Controversial US Preventive Services Task Force Recommendations on the Use of Screening Mammography. J Am Coll Radiol. 2013 Jan; 10(1):21-4. PMID: 23290669.
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    57. Long SS, Morrison WB, Parker L. Vertebroplasty and kyphoplasty in the United States: provider distribution and guidance method, 2001-2010. AJR Am J Roentgenol. 2012 Dec; 199(6):1358-64. PMID: 23169730.
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    58. Levin DC, Rao VM, Parker L. The Recent Downturn in Utilization of CT: The Start of a New Trend? J Am Coll Radiol. 2012 Nov; 9(11):795-8. PMID: 23122346.
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    59. Ives EP, Nazarian LN, Parker L, Garrigues GE, Williams GR. Subscapularis tendon tears: A common sonographic finding in symptomatic postarthroplasty shoulders. J Clin Ultrasound. 2013 Mar; 41(3):129-33. PMID: 22941952.
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    60. Levin DC, Rao VM, Parker L, Frangos AJ. The sharp reductions in medicare payments for noninvasive diagnostic imaging in recent years: will they satisfy the federal policymakers? J Am Coll Radiol. 2012 Sep; 9(9):643-7. PMID: 22954546.
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    61. Babiarz LS, Yousem DM, Parker L, Rao V. Who collects professional fees for neuroradiology interpretation, radiologists or nonradiologists? J Am Coll Radiol. 2012 Jul; 9(7):498-505. PMID: 22748792.
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    62. Levin DC, Parker L, Schwartz GF, Rao VM. Percutaneous needle vs surgical breast biopsy: previous allegations of overuse of surgery are in error. J Am Coll Radiol. 2012 Feb; 9(2):137-40. PMID: 22305700.
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    63. Sharpe RE, Nazarian LN, Parker L, Rao VM, Levin DC. Dramatically increased musculoskeletal ultrasound utilization from 2000 to 2009, especially by podiatrists in private offices. J Am Coll Radiol. 2012 Feb; 9(2):141-6. PMID: 22305701.
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    64. Levin DC, Rao VM, Parker L. Trends in the utilization of outpatient advanced imaging after the deficit reduction act. J Am Coll Radiol. 2012 Jan; 9(1):27-32. PMID: 22221633.
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    65. Levin DC, Rao VM, Parker L, Frangos AJ. Noncardiac point-of-care ultrasound by nonradiologist physicians: how widespread is it? J Am Coll Radiol. 2011 Nov; 8(11):772-5. PMID: 22051460.
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    66. Rao VM, Levin DC, Parker L, Frangos AJ, Sunshine JH. Trends in utilization rates of the various imaging modalities in emergency departments: nationwide Medicare data from 2000 to 2008. J Am Coll Radiol. 2011 Oct; 8(10):706-9. PMID: 21962785.
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    67. Piana PM, Gonsalves CF, Sato T, Anne PR, McCann JW, Bar Ad V, Eschelman DJ, Parker L, Doyle LA, Brown DB. Toxicities after radioembolization with yttrium-90 SIR-spheres: incidence and contributing risk factors at a single center. J Vasc Interv Radiol. 2011 Oct; 22(10):1373-9. PMID: 21764600.
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    68. Babiarz LS, Yousem DM, Parker L, Rao VM, Levin DC. Volume of neuroradiology studies read by neurologists: implications for fellowship training. J Am Coll Radiol. 2011 Jul; 8(7):477-82. PMID: 21723484.
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    69. Duszak R, Parker L, Levin DC, Rao VM. Placement and removal of inferior vena cava filters: national trends in the medicare population. J Am Coll Radiol. 2011 Jul; 8(7):483-9. PMID: 21723485.
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    70. Kazam JK, Nazarian LN, Miller TT, Sofka CM, Parker L, Adler RS. Sonographic evaluation of femoral trochlear cartilage in patients with knee pain. J Ultrasound Med. 2011 Jun; 30(6):797-802. PMID: 21632994.
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    71. Levin DC, Parker L, Halpern EJ, Julsrud PR, Rao VM. The lack of growth in use of coronary CT angiography: is it being appropriately used? AJR Am J Roentgenol. 2011 Apr; 196(4):862-7. PMID: 21427337.
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    72. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Bending the curve: the recent marked slowdown in growth of noninvasive diagnostic imaging. AJR Am J Roentgenol. 2011 Jan; 196(1):W25-9. PMID: 21178027.
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    73. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Medicare payments for noninvasive diagnostic imaging are now higher to nonradiologist physicians than to radiologists. J Am Coll Radiol. 2011 Jan; 8(1):26-32. PMID: 21211761.
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    74. Duszak R, Parker L, Levin DC, Rao VM. Evolving roles of radiologists, nephrologists, and surgeons in endovascular hemodialysis access maintenance procedures. J Am Coll Radiol. 2010 Dec; 7(12):937-42. PMID: 21129684.
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    75. Rao VM, Levin DC, Parker L, Cavanaugh B, Frangos AJ, Sunshine JH. How widely is computer-aided detection used in screening and diagnostic mammography? J Am Coll Radiol. 2010 Oct; 7(10):802-5. PMID: 20889111.
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    76. O'Kane P, Shelkovoy E, McConnell RJ, Shpak V, Parker L, Brenner A, Zablotska L, Tronko M, Hatch M. Frequency of undetected thyroid nodules in a large I-131-exposed population repeatedly screened by ultrasonography: results from the Ukrainian-American cohort study of thyroid cancer and other thyroid diseases following the Chornobyl accident. Thyroid. 2010 Sep; 20(9):959-64. PMID: 20615138.
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    77. Parker L, Levin DC, Frangos A, Rao VM. Geographic variation in the utilization of noninvasive diagnostic imaging: national medicare data, 1998-2007. AJR Am J Roentgenol. 2010 Apr; 194(4):1034-9. PMID: 20308507.
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    78. Agarwal R, Levin DC, Parker L, Rao VM. Trends in PET scanner ownership and leasing by nonradiologist physicians. J Am Coll Radiol. 2010 Mar; 7(3):187-91. PMID: 20193923.
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    79. Verma SK, Mitchell DG, Yang R, Roth CG, O'Kane P, Verma M, Parker L. Exophytic renal masses: angular interface with renal parenchyma for distinguishing benign from malignant lesions at MR imaging. Radiology. 2010 May; 255(2):501-7. PMID: 20160001.
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    80. Levin DC, Rao VM, Parker L. Physician orders contribute to high-tech imaging slowdown. Health Aff (Millwood). 2010 Jan-Feb; 29(1):189-95. PMID: 20048376.
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    81. Levin DC, Rao VM, Parker L, Frangos AJ. The disproportionate effects of the Deficit Reduction Act of 2005 on radiologists' private office MRI and CT practices compared with those of other physicians. J Am Coll Radiol. 2009 Sep; 6(9):620-5. PMID: 19720356.
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    82. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Endovascular repair vs open surgical repair of abdominal aortic aneurysms: comparative utilization trends from 2001 to 2006. J Am Coll Radiol. 2009 Jul; 6(7):506-9. PMID: 19560067.
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    83. de Jesus JO, Parker L, Frangos AJ, Nazarian LN. Accuracy of MRI, MR arthrography, and ultrasound in the diagnosis of rotator cuff tears: a meta-analysis. AJR Am J Roentgenol. 2009 Jun; 192(6):1701-7. PMID: 19457838.
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    84. Levin DC, Rao VM, Parker L, Frangos AJ, Intenzo CM. Recent payment and utilization trends in radionuclide myocardial perfusion imaging: comparison between self-referral and referral to radiologists. J Am Coll Radiol. 2009 Jun; 6(6):437-41. PMID: 19467490.
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    85. Mehta RI, Mitchell DG, Kayler L, Doria C, Bergin D, Parker L. Inferior vena cava encirclement by caudate lobe hypertrophy: evaluation by MRI and CT and its impact on caval preservation during orthotopic liver transplantation. Abdom Imaging. 2010 Jun; 35(3):322-7. PMID: 19365669.
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    86. Verma SK, Mitchell DG, Bergin D, Lakhman Y, Austin A, Verma M, Assis D, Herrine SK, Parker L. Dilated cisternae chyli: a sign of uncompensated cirrhosis at MR imaging. Abdom Imaging. 2009 Mar-Apr; 34(2):211-6. PMID: 18219518.
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    87. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Recent shifts in place of service for noninvasive diagnostic imaging: have hospitals missed an opportunity? J Am Coll Radiol. 2009 Feb; 6(2):96-9. PMID: 19179236.
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    88. O'Kane P, Shelkovoy E, McConnell RJ, Shpak V, Parker L, Bogdanova TI, Brenner A, Naida Y, Frangos A, Zablotska L, Robbins J, Greenebaum E, Zurnadzhy LY, Tronko M, Hatch M. Differences in sonographic conspicuity according to papillary thyroid cancer subtype: results of the Ukrainian-American cohort study after the Chornobyl accident. AJR Am J Roentgenol. 2008 Dec; 191(6):W293-8. PMID: 19020218.
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    89. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Ownership or leasing of CT scanners by nonradiologist physicians: a rapidly growing trend that raises concern about self-referral. J Am Coll Radiol. 2008 Dec; 5(12):1206-9. PMID: 19027685.
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    90. Verma SK, Mitchell DG, Lakhman Y, Bergin D, Dolin RJ, Doria C, Parker L. Paraumbilical collateral veins on MRI as possible protection against portal venous thrombosis in candidates for liver transplantation. Abdom Imaging. 2008 Sep-Oct; 33(5):536-41. PMID: 17924159.
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    91. Forsberg F, Stein AD, Merton DA, Lipcan KJ, Herzog D, Parker L, Needleman L. Carotid stenosis assessed with a 4-dimensional semiautomated Doppler system. J Ultrasound Med. 2008 Sep; 27(9):1337-44. PMID: 18716143.
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    92. Bergin D, Hochberg H, Zoga AC, Qazi N, Parker L, Morrison WB. Indirect soft-tissue and osseous signs on knee MRI of surgically proven meniscal tears. AJR Am J Roentgenol. 2008 Jul; 191(1):86-92. PMID: 18562729.
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    93. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Recent trends in utilization rates of abdominal imaging: the relative roles of radiologists and nonradiologist physicians. J Am Coll Radiol. 2008 Jun; 5(6):744-7. PMID: 18514954.
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    94. Verma SK, Bergin D, Gonsalves CF, Mitchell DG, Lev-Toaff AS, Parker L. Submucosal fibroids becoming endocavitary following uterine artery embolization: risk assessment by MRI. AJR Am J Roentgenol. 2008 May; 190(5):1220-6. PMID: 18430835.
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    95. Rao VM, Levin DC, Parker L, Frangos AJ. Recent trends in mammography utilization in the Medicare population: is there a cause for concern? J Am Coll Radiol. 2008 May; 5(5):652-6. PMID: 18442771.
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    96. Maes R, Morrison WB, Parker L, Schweitzer ME, Carrino JA. Lumbar interspinous bursitis (Baastrup disease) in a symptomatic population: prevalence on magnetic resonance imaging. Spine (Phila Pa 1976). 2008 Apr 1; 33(7):E211-5. PMID: 18379391.
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    97. Parker L, Nazarian LN, Carrino JA, Morrison WB, Grimaldi G, Frangos AJ, Levin DC, Rao VM. Musculoskeletal imaging: medicare use, costs, and potential for cost substitution. J Am Coll Radiol. 2008 Mar; 5(3):182-8. PMID: 18312965.
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    98. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Ownership or leasing of MRI facilities by nonradiologist physicians is a rapidly growing trend. J Am Coll Radiol. 2008 Feb; 5(2):105-9. PMID: 18242525.
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    99. Dutka MV, Bergin D, O'Kane PL, Frangos AJ, Parker L, Mitchell DG. Rapid multiplanar abdominal survey using MRI with the steady-state free-precession technique. J Magn Reson Imaging. 2008 Jan; 27(1):198-203. PMID: 18022845.
      Citations:    
    100. Kavanagh EC, Koulouris G, Parker L, Morrison WB, Bergin D, Zoga AC, Dlugosz JA, Nazarian LN. Does extended-field-of-view sonography improve interrater reliability for the detection of rotator cuff muscle atrophy? AJR Am J Roentgenol. 2008 Jan; 190(1):27-31. PMID: 18094290.
      Citations:    
    101. Mitchell DG, Navarro VJ, Herrine SK, Bergin D, Parker L, Frangos A, McCue P, Rubin R. Compensated hepatitis C: unenhanced MR imaging correlated with pathologic grading and staging. Abdom Imaging. 2008 Jan-Feb; 33(1):58-64. PMID: 17387539.
      Citations:    
    102. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Recent trends in utilization rates of noncardiac thoracic imaging: an example of how imaging growth might be controlled. J Am Coll Radiol. 2007 Dec; 4(12):886-9. PMID: 18047983.
      Citations:    
    103. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. The effect of the introduction of MR and CT angiography on the utilization of catheter angiography for peripheral arterial disease. J Am Coll Radiol. 2007 Jul; 4(7):457-60. PMID: 17601587.
      Citations:    
    104. Morrison WB, Parker L, Frangos AJ, Carrino JA. Vertebroplasty in the United States: guidance method and provider distribution, 2001-2003. Radiology. 2007 Apr; 243(1):166-70. PMID: 17392252.
      Citations:    
    105. Kavanagh EC, Roberts CC, Frangos A, Parker L, Gopez A, Deely D, Morrison WB. Musculoskeletal biopsy: utilization and provider distribution in the United States Medicare population. Acad Radiol. 2007 Mar; 14(3):371-5. PMID: 17307671.
      Citations:    
    106. Levin DC, Rao VM, Frangos AJ, Parker L, Sunshine JH. Recent trends in utilization of vascular ultrasound among radiologists, surgeons, cardiologists, and other physicians. J Am Coll Radiol. 2007 Feb; 4(2):125-7. PMID: 17412244.
      Citations:    
    107. Levin DC, Rao VM, Frangos AJ, Parker L, Sunshine JH. Current practice patterns and recent trends in breast biopsy among radiologists and surgeons. J Am Coll Radiol. 2006 Sep; 3(9):707-9. PMID: 17412153.
      Citations:    
    108. Bergin D, Parker L, Zoga A, Morrison W. Abnormalities on MRI of the subscapularis tendon in the presence of a full-thickness supraspinatus tendon tear. AJR Am J Roentgenol. 2006 Feb; 186(2):454-9. PMID: 16423952.
      Citations:    
    109. Levin DC, Rao VM, Frangos AJ, Parker L, Sunshine JH. The controversy over advanced cardiovascular imaging: relative roles of radiologists, cardiologists, and other physicians in CT and MRI of the cardiovascular system. J Am Coll Radiol. 2006 Jan; 3(1):16-8. PMID: 17412000.
      Citations:    
    110. Levin DC, Intenzo CM, Rao VM, Frangos AJ, Parker L, Sunshine JH. Comparison of recent utilization trends in radionuclide myocardial perfusion imaging among radiologists and cardiologists. J Am Coll Radiol. 2005 Oct; 2(10):821-4. PMID: 17411941.
      Citations:    
    111. Levin DC, Rao VM, Parker L, Frangos AJ, Sunshine JH. Recent trends in utilization of cardiovascular imaging: how important are they for radiology? J Am Coll Radiol. 2005 Sep; 2(9):736-9. PMID: 17411920.
      Citations:    
    112. Levin D, Nazarian LN, Miller TT, O'Kane PL, Feld RI, Parker L, McShane JM. Lateral epicondylitis of the elbow: US findings. Radiology. 2005 Oct; 237(1):230-4. PMID: 16118152.
      Citations:    
    113. Intenzo CM, Parker L, Rao VM, Levin DC. Changes in procedure volume and service provider distribution among radiologists and nonradiologists in dual-energy x-ray absorptiometry between 1996 and 2002. J Am Coll Radiol. 2005 Aug; 2(8):662-4. PMID: 17411901.
      Citations:    
    114. Maitino AJ, Levin DC, Rao VM, Parker L, Sunshine JH. Do emergency medicine physicians perform ultrasound and conventional radiography in the emergency department? Recent trends from 1993 to 2001. J Am Coll Radiol. 2005 Mar; 2(3):274-8. PMID: 17411811.
      Citations:    
    115. Karchevsky M, Schweitzer ME, Carrino JA, Zoga A, Montgomery D, Parker L. Reactive endplate marrow changes: a systematic morphologic and epidemiologic evaluation. Skeletal Radiol. 2005 Mar; 34(3):125-9. PMID: 15647940.
      Citations:    
    116. Wu HT, Schweitzer ME, Parker L. Is epidural fat associated with body habitus? J Comput Assist Tomogr. 2005 Jan-Feb; 29(1):99-102. PMID: 15665692.
      Citations:    
    117. Levin DC, Rao VM, Parker L, Bonn J, Maitino AJ, Sunshine JH. The changing roles of radiologists, cardiologists, and vascular surgeons in percutaneous peripheral arterial interventions during a recent five-year interval. J Am Coll Radiol. 2005 Jan; 2(1):39-42. PMID: 17411758.
      Citations:    
    118. Levin DC, Rao VM, Parker L, Maitino AJ, Sunshine JH. Who gets paid for diagnostic imaging, and how much? J Am Coll Radiol. 2004 Dec; 1(12):931-5. PMID: 17411735.
      Citations:    
    119. Gardiner GA, Sullivan KL, Halpern EJ, Parker L, Beck M, Bonn J, Levin DC. Angiographic assessment of initial balloon angioplasty results. J Vasc Interv Radiol. 2004 Oct; 15(10):1081-7. PMID: 15466794.
      Citations:    
    120. Levin DC, Rao VM, Maitino AJ, Parker L, Sunshine JH. Comparative increases in utilization rates of ultrasound examinations among radiologists, cardiologists, and other physicians from 1993 to 2001. J Am Coll Radiol. 2004 Aug; 1(8):549-52. PMID: 17411652.
      Citations:    
    121. Shabshin N, Schweitzer ME, Morrison WB, Parker L. MRI criteria for patella alta and baja. Skeletal Radiol. 2004 Aug; 33(8):445-50. PMID: 15221214.
      Citations:    
    122. Glynn N, Morrison WB, Parker L, Schweitzer ME, Carrino JA. Trends in utilization: has extremity MR imaging replaced diagnostic arthroscopy? Skeletal Radiol. 2004 May; 33(5):272-6. PMID: 14985875.
      Citations:    
    123. Forsberg F, Goldberg BB, Merritt CR, Parker L, Maitino AJ, Palazzo JJ, Merton DA, Schultz SM, Needleman L. Diagnosing breast lesions with contrast-enhanced 3-dimensional power Doppler imaging. J Ultrasound Med. 2004 Feb; 23(2):173-82. PMID: 14992354.
      Citations:    
    124. Fayad LM, Holland GA, Bergin D, Iqbal N, Parker L, Curcillo PG, Kowalski TE, Park P, Intenzo C, Mitchell DG. Functional magnetic resonance cholangiography (fMRC) of the gallbladder and biliary tree with contrast-enhanced magnetic resonance cholangiography. J Magn Reson Imaging. 2003 Oct; 18(4):449-60. PMID: 14508782.
      Citations:    
    125. Fayad LM, Parellada JA, Parker L, Schweitzer ME. MR imaging of anterior cruciate ligament tears: is there a gender gap? Skeletal Radiol. 2003 Nov; 32(11):639-46. PMID: 14504836.
      Citations:    
    126. Maitino AJ, Levin DC, Parker L, Rao VM, Sunshine JH. Practice patterns of radiologists and nonradiologists in utilization of noninvasive diagnostic imaging among the Medicare population 1993-1999. Radiology. 2003 Sep; 228(3):795-801. PMID: 12954898.
      Citations:    
    127. Maitino AJ, Levin DC, Parker L, Rao VM, Sunshine JH. Nationwide trends in rates of utilization of noninvasive diagnostic imaging among the Medicare population between 1993 and 1999. Radiology. 2003 Apr; 227(1):113-7. PMID: 12668743.
      Citations:    
    128. Shi H, Schweitzer ME, Carrino JA, Parker L. MR imaging of the lumbar spine: relation of posterior soft-tissue edema-like signal and body weight. AJR Am J Roentgenol. 2003 Jan; 180(1):81-6. PMID: 12490482.
      Citations:    
    129. Zhang XM, Shi H, Parker L, Dohke M, Holland GA, Mitchell DG. Suspected early or mild chronic pancreatitis: enhancement patterns on gadolinium chelate dynamic MRI. Magnetic resonance imaging. J Magn Reson Imaging. 2003 Jan; 17(1):86-94. PMID: 12500277.
      Citations:    
    130. Lin DC, Nazarian LN, O'Kane PL, McShane JM, Parker L, Merritt CR. Advantages of real-time spatial compound sonography of the musculoskeletal system versus conventional sonography. AJR Am J Roentgenol. 2002 Dec; 179(6):1629-31. PMID: 12438067.
      Citations:    
    131. Carrino JA, Morrison WB, Parker L, Schweitzer ME, Levin DC, Sunshine JH. Spinal injection procedures: volume, provider distribution, and reimbursement in the U.S. medicare population from 1993 to 1999. Radiology. 2002 Dec; 225(3):723-9. PMID: 12461252.
      Citations:    
    132. Basak S, Nazarian LN, Wechsler RJ, Parker L, Williams BD, Lev-Toaff AS, Kurtz AB. Is unenhanced CT sufficient for evaluation of acute abdominal pain? Clin Imaging. 2002 Nov-Dec; 26(6):405-7. PMID: 12427436.
      Citations:    
    133. Lim PS, Nazarian LN, Wechsler RJ, Kurtz AB, Parker L. The endometrium on routine contrast-enhanced CT in asymptomatic postmenopausal women: avoiding errors in interpretation. Clin Imaging. 2002 Sep-Oct; 26(5):325-9. PMID: 12213366.
      Citations:    
    134. Zhang XM, Mitchell DG, Shi H, Holland GA, Parker L, Herrine SK, Pasqualin D, Rubin R. Chronic hepatitis C activity: correlation with lymphadenopathy on MR imaging. AJR Am J Roentgenol. 2002 Aug; 179(2):417-22. PMID: 12130443.
      Citations:    
    135. Mitchell DG, Parker L, Sunshine JH, Levin DC. Body MR imaging and CT volume: variations and trends based on an analysis of medicare and fee-for-service health insurance databases. AJR Am J Roentgenol. 2002 Jul; 179(1):27-31. PMID: 12076898.
      Citations:    
    136. Zhang XM, Mitchell DG, Dohke M, Holland GA, Parker L. Pancreatic cysts: depiction on single-shot fast spin-echo MR images. Radiology. 2002 May; 223(2):547-53. PMID: 11997566.
      Citations:    
    137. Livstone BJ, Parker L, Levin DC. Trends in the utilization of MR angiography and body MR imaging in the US Medicare population: 1993-1998. Radiology. 2002 Mar; 222(3):615-8. PMID: 11867774.
      Citations:    
    138. Levin DC, Parker L, Sunshine JH, Pentecost MJ. Cardiovascular imaging: who does it and how important is it to the practice of radiology? AJR Am J Roentgenol. 2002 Feb; 178(2):303-6. PMID: 11804883.
      Citations:    
    139. Levin DC, Parker L, Intenzo CM, Sunshine JH. Recent rapid increase in utilization of radionuclide myocardial perfusion imaging and related procedures: 1996-1998 practice patterns. Radiology. 2002 Jan; 222(1):144-8. PMID: 11756719.
      Citations:    
    140. Matsuoka LY, Wortsman J, Lifrak ET, Parker LN, Mehta RG. Effect of isotretinoin in acne is not mediated by adrenal androgens . J Am Acad Dermatol. 1989 Jan; 20(1):128-9. PMID: 2521493.
      Citations:    
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