Laurence Parker

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..This study provides an overview of geographic variation in noninvasive diagnostic imaging utilization in the Medicare population over the period 1998 to 2007...

..To study recent practice patterns in radionuclide myocardial perfusion imaging (MPI) and related procedures among radiologists, cardiologists, and other physicians...

..The aim of this study was to examine growth trends in ownership or leasing of private-office PET scanners by nonradiologist physicians...

..To determine the apportionment of Medicare Part B payments for noninvasive diagnostic imaging among radiologists and other specialists and to ascertain the trends in these payments over a recent 5-year period...

..To determine (a) the role cardiovascular imaging (CVI) plays within the spectrum of noninvasive diagnostic imaging (NDI), (b) the role radiologists play in CVI, and (c) recent trends in CVI workload among radiologists and cardiologists...

..The purpose of this study was to determine the relative roles of the different specialties in these procedures...

..To retrospectively determine whether benign exophytic renal masses can be distinguished from renal cell carcinoma (RCC) on the basis of angular interface at single-shot fast spin-echo (SE) T2-weighted magnetic resonance (MR) imaging...

..To study trends in the utilization of the various noncardiac thoracic imaging modalities in the Medicare population in recent years and to compare the roles of radiologists and nonradiologist physicians...

..The aim of this study was to examine recent nationwide trends in the ownership or leasing of computed tomographic (CT) scanners in private offices by nonradiologist physicians...

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..Our objective was to assess in a repeatedly screened I-131-exposed population the frequency with which a thyroid nodule could be retrospectively identified on ultrasonography studies preceding the one on which it was initially detected...

..To ascertain the relative roles of radiologists and surgeons in breast biopsy...

..To retrospectively evaluate the sensitivity, specificity, and positive and negative predictive values of steady-state free-precession (SSFP) survey MRI of the abdomen...

..To ascertain changes in the utilization rates of diagnostic ultrasound among radiologists, cardiologists, and other physicians in recent years...

..To determine how much vascular ultrasound is performed by the various medical specialties and to assess the utilization trends among them in recent years...

..To study recent trends in the utilization of abdominal imaging in the Medicare population...

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..The aim of this study was to examine recent shifts in place of service for noninvasive diagnostic imaging (NDI) and determine whether hospitals have lost business to private outpatient imaging facilities...

..Yet nonradiologists have become increasingly aggressive in their performance and interpretation of imaging. The purpose of this study was to track overall Medicare payments to radiologists and nonradiologist physicians in recent years...

..The aim of this study was to determine to what extent EVAR is replacing OSR, whether the frequency of treatment is increasing with the advent of the less invasive approach, and which specialties are performing the procedures...

..The aim of this study was to see if these developments occurred during the years after the DRA...

..The use of point-of-care (POC) ultrasound by nonradiologist physicians has recently been advocated. The aim of this study was to see how widespread this practice is...

..To study utilization trends in the various imaging modalities in emergency departments (EDs) over a recent multiyear period...

..The aim of this study was to determine how widely computer-aided detection (CAD) is used in screening and diagnostic mammography and to see if there are differences between hospital facilities and private offices...

..We sought to evaluate the incidence of IVC encirclement by hepatic parenchyma using preoperative MRI and CT and its effect on surgical technique and complications...

..More likely, there has been a change in physicians' ordering patterns, possibly due to the influence of radiology business management companies (RBMs) and imaging guidelines promulgated by specialty societies...

..To compare nationwide trends in noninvasive diagnostic imaging (NDI) practice patterns of radiologists and of nonradiologists among the Medicare population during the 6 years from 1993 to 1999...

..The purpose of this study was therefore to compare the effects of the DRA on the in-office MRI and CT practices of radiologists and NRPs...

..We prospectively examined unenhanced MR imaging findings in relation to pathologic fibrosis, inflammation and steatosis in patients with compensated chronic hepatitis C viral infection (HCV)...

..The aim of this study was to examine the effects of self-referral by comparing recent trends in payments and utilization rates for radionuclide myocardial perfusion imaging (MPI) among radiologists and cardiologists between 1998 and 2006...

..We hypothesized that extended-field-of-view (EFOV) sonography would allow greater interrater reliability than conventional sonography for the evaluation of rotator cuff muscle atrophy...

..The purpose of this study was to document trends in MSK ultrasound utilization from 2000 to 2009 within the Medicare population...

..The purpose of this article is to determine whether there has been any change in the rapid growth pattern that has characterized noninvasive diagnostic imaging in recent years...

..To study growth trends in the ownership of magnetic resonance imaging (MRI) examinations by nonradiologist physicians who either own the equipment outright or are involved in scan leasing arrangements...

..Recent published reports have shown a decline in the mammography screening rate in women over age 40, but it is not known whether this trend is a reason for concern in the Medicare population...

..The purpose of this article is to study recent utilization trends in coronary CT angiography (CTA) and compare them with radionuclide myocardial perfusion imaging (MPI), a competing procedure...

..To examine trends in emergency medicine physicians' participation in diagnostic ultrasound and conventional radiography from 1993 to 2001...

..To use the nationwide Medicare database to retrospectively evaluate the provider distribution for vertebroplasty, as well as the guidance method used in the United States...

..Physicians from many specialties perform musculoskeletal biopsy. Using the Medicare database, we sought to determine which specialties represent the physicians who are performing the majority...

..To report the incidence of liver function test (LFT) toxicities after radioembolization with yttrium-90 ((90)Y) SIR-Spheres and review potential risk factors...

..To determine whether intravenous contrast improves the ability of radiologists to establish the cause of acute abdominal pain after nondiagnostic or normal unenhanced CT...

..To determine current utilization rates and recent nationwide trends for noninvasive diagnostic imaging (NDI) among the Medicare population...

..The purpose of our study was to assess the relationship between the endometrium and submucosal fibroids before and after uterine artery embolization (UAE)...

..To evaluate spinal injection procedures for trends in volume, reimbursement, and physician specialty participation...

..In order to retrospectively determine the frequency of dilated cisterna chyli (CC) on MR images in patients with cirrhosis, and to assess its value as a simple diagnostic imaging sign of uncompensated cirrhosis...

..The aim of this study was to more accurately assess the use of percutaneous core needle biopsy (PNB) compared with surgical biopsy...

..To compare mammography with contrast-enhanced 2- and 3-dimensional power Doppler imaging for the diagnosis of breast cancer...

..The purpose of this study was to compare the diagnostic accuracy of MRI, MR arthrography, and ultrasound for the diagnosis of rotator cuff tears through a meta-analysis of the studies in the literature...

..CONCLUSION: Measuring pancreatic signal intensity on gadolinium chelate dynamic MRI is helpful for diagnosing early or mild chronic pancreatitis, especially before apparent pancreatic morphologic or signal intensity changes are present...

..To determine changes in the number of dual-energy x-ray absorptiometry (DEXA) procedures performed in the United States, as well as changes in the relative number of procedures performed by radiologists and nonradiologists...

..A secondary goal was to assess Encore volume flow measurements...

..Statistical analysis was performed by Fisher exact tests; 50 selected studies were reviewed independently by two additional readers to determine interobserver agreement via intraclass correlation coefficient (ICC)...

..The relationship between symptoms and intratendinous calcification, tendon thickening, adjacent bone irregularity, focal hypoechoic regions, and diffuse heterogeneity was statistically significant...

..To examine the relative change in utilization of magnetic resonance (MR) imaging of the extremities versus diagnostic and therapeutic arthroscopy...

..The aim of this study was to examine recent trends in Medicare reimbursements for noninvasive diagnostic imaging (NDI)...

..The aim of this study was to ascertain the effect of these recommendations on the utilization of screening mammography in the Medicare population...

..The relative procedure volume of abdominal MR imaging varied more than fivefold from rural to urban provider locations and double from nonteaching to teaching hospitals...

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..The purpose of this study was to determine the frequency of abnormal MR signal intensity in soft tissues and osseous structures in association with surgically proven meniscal tears...

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..The study objective was to identify whether there is any relationship between the conspicuity of sonographically detected papillary cancers and histologic subtype...

..4 and L3.9, respectively, p = 0.54). CONCLUSION: The severity of posterior lumbar subcutaneous edema and the volume of fluid collections on MR imaging are associated with increased weight...

..To evaluate the morphology and location of vertebral endplate changes, and to analyze their association with age, gender, and body mass index (BMI)...

..05). We believe that our findings will help prevent overdiagnosis of endometrial fluid or thickening in asymptomatic women...

..Because musculoskeletal sonography is highly dependent on image quality and tissue-plane definition, spatial compound sonography represents an important development...

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..Prevalence is especially high in patients with pancreatitis...

..Lymph node number, size, and hyperintensity were related to the activity of chronic hepatitis C, but the results of liver function tests were not...

..To evaluate, in the spine, the relationship between the amount of epidural fat to body weight, height, body mass index (BMI), presence of obesity, depth of posterior subcutaneous fat, as well as gender and age...

..Cross-sectional retrospective review of 539 patients with lumbar spine magnetic resonance imaging (MRI)...

..Clinically, females receive anterior cruciate ligament (ACL) tears more commonly than males. We explored whether gender differences exist in MR imaging patterns of ACL tears...

..To determine the diagnostic performance of functional magnetic resonance cholangiography (fMRC) for the evaluation of anatomic and functional biliary disorders...