OBJECTIVE Chemical reactions involved in preparing 99mTc radiopharmaceuticals occasionally result in products of substandard purity. A retrospective examination of preparation problems that occurred in the author's institution was conducted to better define the incidence, recognize patterns and identify causes of substandard 99mTc radiopharmaceutical products. METHODS All 99mTc radiopharmaceu...

meckel's diverticulum is a common congenital disorder which may result in gl bleeding. for definite diagnosis before surgery, radiographic procedures such as small intestine barium studies are not greatly successful; on the other hand tc-99m-pertechnetate imaging is a physiologic and noninvasive method with high sensitivity and specificity. in this report, three patients with rectorrhagia,...

UNLABELLED Pertechnetate (as (99m)TcO(4)(-)), (123)I(-), and (131)I(-) have a long and successful history of use in the diagnosis and therapy of thyroid cancer, with uptake into thyroid tissue mediated by the sodium-iodide symporter (NIS). NIS has also emerged as a potential target for radiotherapy of nonthyroid malignancies that express the endogenous or transfected symporter. Perrhenates (as ...

PURPOSE The aim of this study is to evaluate structural alterations of thyroid tissue after microwave ablation using elastography and scintigraphic imaging to investigate the applicability of these diagnostic methods for follow-up.  MATERIALS AND METHODS 35 patients with 39 thyroid nodules were evaluated using elastography and scintigraphic imaging before and after ultrasound-guided microwave...

A method for measuring regional cerebral circulation time (rCCT) between the hemispheres using intravenous pertechnetate and a multidetector system is presented. Interhemispheric differences of rCCT instead of absolute values were selected because of the variation of pertechnetate bolus dispersion due to changes in the systemic circulation and injection technique inter-and intraindividually. Ti...

When handling unsealed radioactive sources, radiological protection attention must be taken to avoid unnecessary exposure and contaminations, an important necessary practice prevent such contaminations is the use of gloves when these sources. The present work aimed determine effectiveness contamination provided by different types disposable polymeric used in Nuclear Medicine Service Clinic Hosp...

The electroreduction of the pertechnetate ions has been examined in sulfuric acid solutions (0.5-4 M) using optically transparent thin layer spectroelectrochemical (RVC-OTTLE) cell. Soluble Tc(III), TcO2+ and [Tc(μ-O)2Tc]3+/4+ species with absorption bands at 420-450, 400, and 502 nm, respectively, were found to be formed during the reduction of TcO4- ions. The strongly acidic medium was found ...