Melvyn T Korobkin

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PURPOSE To assess the accuracy of a dedicated adrenal computed tomographic (CT) protocol. MATERIALS AND METHODS One hundred sixty-six adrenal masses were evaluated with a protocol consisting of unenhanced CT, and, for those with attenuation values greater than 10 HU, contrast material-enhanced and delayed enhanced CT. Attenuation values and enhancement(More)
OBJECTIVE The purpose of this study was to analyze the CT contrast enhancement washout curves of adrenal masses and to determine the earliest time after initial enhancement that differentiation of adenomas from nonadenomas is possible. MATERIALS AND METHODS Contrast enhancement washout curves were generated after delayed contrast-enhanced CT scans of 52(More)
OBJECTIVE Although representing a minority of adrenal adenomas, the lipid-poor variety cannot be accurately identified on unenhanced CT or chemical shift MR imaging. We compared the delayed contrast-enhanced CT features of lipid-poor adenomas with those of lipid-rich adenomas and of adrenal nonadenomas to determine whether there were differences in the(More)
PURPOSE To evaluate multi-detector row computed tomographic (CT) urography for detection of urinary tract abnormalities. MATERIALS AND METHODS Sixty-five patients referred from the urology service, in whom urinary tract abnormalities were strongly suspected, underwent multi-detector row CT urography. The technique included unenhanced, nephrographic,(More)
Radiographic assessment of the patellofemoral joint (PFJ) is problematic because conventional views are cumbersome, difficult to standardize, and not reliable for displaying this joint with flexion of the knee less than about 30 degrees. We used computed tomography (CT) to obtain conveniently a direct transaxial view of the PFJ in ten normal human(More)
OBJECTIVE The purpose of our study was to determine whether unenhanced CT attenuation value, enhanced CT attenuation value, or lesion size can be used to differentiate adrenal adenomas from nonadenomatous adrenal masses. MATERIALS AND METHODS We retrospectively assessed the CT scans of 135 adrenal masses in 124 patients with a variety of adrenal masses.(More)
PURPOSE To investigate the utility of computed tomographic (CT) virtual cystoscopy in the detection of bladder tumors. MATERIALS AND METHODS Twenty-six patients suspected or known to have bladder neoplasms underwent CT virtual and conventional cystoscopy. The bladder was insufflated with carbon dioxide through a Foley catheter. Helical CT of the bladder(More)
PURPOSE To determine the optimal phase for enhancement of the normal pancreas and peripancreatic vasculature and the maximal tumor-to-pancreatic parenchymal enhancement difference by using multiphase, contrast material-enhanced, multi-detector row helical computed tomography (CT). MATERIALS AND METHODS Forty-nine patients with a normal-appearing pancreas(More)