UNLABELLED We evaluated the clinical utility of positive somatostatin receptor scintigraphy in patients with medullary thyroid cancer (MTC). METHODS Twenty-four MTC patients with increased calcitonin levels underwent somatostatin receptor scintigraphy using 111In-pentetreotide (120-200 MBq) with early (4 hr after injection) and delayed (24 hr) whole-body scans and liver SPECT imaging. In Grou...

Introduction: The aim of this study was to evaluate the impact of measurement of coronary artery calcification score (CAC) in patients with suspected coronary artery disease (CAD) and a normal myocardial perfusion scan. Methods: In a prospective study we measured the calcium score of 74 patients (29 m, 45 f, mean age 58.7 (m) and 64.4 (f)) with suspicion of CAD and a normal perfusion scan. In ...

BACKGROUND Renal scintigraphy, generally using 99mTc-DMSA, is the accepted reference standard for detection of renal cortical changes. The timing of the test, i.e., whether an acute 99mTc-DMSA scan, a follow-up only or both scans should be performed, however, remains open to discussion. In our study, a six-month follow- up DMSA scan was performed in all the children diagnosed with a first attac...

background: bilateral neck exploration is the gold standard for parathyroid adenoma localization in primary hyperparathyroidism. but surgeons do not have adequate experience for accurate surgical exploration and new methods are developed for surgery like unilateral exploration and minimally invasive surgery, thus, preoperative localization could reduces time and stress in surgical performance. ...

UNLABELLED The purpose of this study was to describe the clinical presentation of bone metastases in patients with carcinoid tumors and to determine the diagnostic value of imaging techniques and markers of bone metabolism. METHODS This retrospective study was performed on the entire group of patients with carcinoid tumors treated in our hospital from January 1992 to May 1999. Only patients w...

UNLABELLED (99m)Tc-labeled red blood cell scintigraphy is a powerful detection and localization tool that may be confounded by false-positive and false-negative findings. Subtraction scintigraphy has been used in the evaluation of acute lower gastrointestinal tract hemorrhage (LGIH) to reduce the impact of interpretive confounders. The aim of this investigation was to evaluate the cost-effectiv...

Introduction Over the past few decades, a number of methods have been developed for the in vivo determination of bone density. The most important of these methods are based on measuring the attenuation (reduction in intensity) of a beam of either electromagnetic radiation (in the form of X-rays or gamma rays) or ultrasound when it passes through bone; in the latter case, the measurement of velo...

Mailing address: Pedro Silvio Farsky Rua Caravelas, 423 04012-090 São Paulo, SP Brazil E-mail: [email protected] Sent for publishing on: 06/23/2004 Accepted on: 02/23/2005 The benefit of myocardial revascularization (RM) surgery was first demonstrated in patients with severe left ventricular dysfunction with CASS registration1. A longer survival, in five years, was verified in patients with le...