AJR. American journal of roentgenology
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AJR Am J Roentgenol · Apr 1996
Breath-hold ultrafast three-dimensional gadolinium-enhanced MR angiography of the aorta and the renal and other visceral abdominal arteries.
The objectives of this study were to develop and show the efficacy of a breath-hold ultrafast three-dimensional (3D) spoiled gradient-echo (SPGR) gadolinium-enhanced MR angiographic technique for imaging the aorta and the renal and other visceral arteries of the abdomen; and to compare breath-hold ultrafast 3D SPGR with two-dimensional (2D) time-of-flight (TOF) and non-breath-hold ultrafast 3D SPGR in the same patients. ⋯ Breath-hold ultrafast 3D SPGR when combined with 2D TOF accurately identified and graded all (51 of 51) renal, celiac, superior mesenteric, and inferior mesenteric artery stenoses or occlusions.
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AJR Am J Roentgenol · Apr 1996
Semimembranosus-tibial collateral ligament bursitis: MR imaging findings.
The purpose of this paper is to describe the MR imaging characteristics of semimembranosus-tibial collateral ligament (SMTCL) bursitis. ⋯ SMTCL bursitis has a characteristic MR imaging appearance of fluid draped over the semimembranosus tendon in the shape of an inverted U. This entity can clinically mimic internal derangement of the knee, typically causing pain more superior and posterior to that of pes anserinus bursitis. MR imaging is useful in diagnosing SMTCL bursitis and avoiding unnecessary knee arthroscopy.
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AJR Am J Roentgenol · Apr 1996
Breast imaging reporting and data system standardized mammography lexicon: observer variability in lesion description.
The American College of Radiology has recommended the Breast Imaging Reporting and Data System (BI-RADS) as a standardized scheme for describing mammographic lesions. The objective of this study was to measure inter- and intraobserver variabilities of radiologists' descriptions of mammographic lesions with the BI-RADS standardized lexicon. ⋯ BI-RADS is moderately successful in providing a standardized language for physicians to describe lesion morphology. Efforts to reevaluate specific terms and the diagnostic significance assigned to calcification descriptors may prove useful in maintaining the promise of improved quality with the BI-RADS standardized mammography lexicon.
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The objective of this study was to demonstrate the spectrum of appearances of renal lymphoma using current MR techniques including gadolinium enhancement. ⋯ Three types of renal involvement with lymphoma were observed. The most common appearance was a large retroperitoneal mass that invaded the kidney. Tumors had low to intermediate signal intensity on T1- and T2-weighted images and had diffuse heterogenous enhancement that was less than that of renal parenchyma.