The Bell-Thompson rule as an aid for peripheral percutaneous transluminal angioplasty.
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Angioplasty, Balloon↗
Biomedical subjects
R A Blinder
Publications and source records attributed to R A Blinder.
MR-tutor: a program for teaching the interdependence of factors which influence signal intensity in magnetic resonance imaging.
Magnetic resonance (MR) imaging is a valuable diagnostic radiologic procedure. The appearance of tissues on the MR scan is dependent upon a complex relationship among a number of variables. We have written a computer program which teaches students of magnetic resonance imaging the interdependence of these variables and how they affect the appearance of tissues on MR images. The program is written in BASIC for the IBM* and compatible computers. A listing of the program appears in the Appendix of this article.
Computer-Assisted Instruction↗
MR imaging with surface coils in primary hyperparathyroidism.
The use of magnetic resonance (MR) to preoperatively evaluate patients with primary hyperparathyroidism was assessed using a 1.5 T system and surface coil reception. Twenty-five patients with primary hyperparathyroidism were studied before surgical exploration. Axial images, 5 mm thick, were obtained from the thyroid cartilage to the sternal notch. Both T1-weighted [short repetition time (TR), short echo time (TE)] and T2-weighted (long TR, long TE) spin echo sequences were performed in most cases. Parathyroid adenomas typically demonstrated greater signal than surrounding tissues on T2-weighted sequences, yet demonstrated signal intensity that was less than or equal to normal thyroid tissue on T1-weighted sequences. Using these criteria, MR correctly identified 17 of 20 surgically proven parathyroid adenomas in the neck. Magnetic resonance appeared less sensitive in two patients with parathyroid hyperplasia, identifying only one of six hyperplastic glands. We conclude that MR with surface coils provides high contrast, anatomic delineation of the neck and is useful for preoperative localization of parathyroid tumors.
Adenoma↗
MR imaging of stump neuroma.
Painful stump neuromas in the postamputation patient are difficult to diagnose and treat. We report a case in which magnetic resonance allowed precise preoperative diagnosis and localization of such a lesion. Magnetic resonance, with its ability for long axis imaging in the extremity, is ideally suited for the workup of stump neuromas.
Amputation Stumps↗