Defect size on myocardial tomograms was measured in 30 patients who underwent 2 separate studies, 1 with thallium-201 (TI-201), the other with technetium-99m-methoxyisobutyl isonitrile (MIBI). A group of 15 patients with myocardial infarction was studied at rest and received both tracers on the same day.
Get MoreThallium-201 subtraction scintigraphy has been used in Wellington Hospital for preoperative localisation of parathyroid adenomas since 1984. The technique wa audited by comparing the scan reports with the outcome at operation in 33 patients, 30 of …
Get More12%The purpose of the present study was to assess the ability of technetium-99m-tetrofosmin (99m Tc-TF) to predict tumor malignancy and to compare its uptake with that of thallium-201 (201 Tl), technetium-99m-hexakis-2-methoxyisobutyl isonitrile (99m Tc-MIBI) and fluorine-18-fluorodeoxyglucose (18 F-FDG) in brain tumors.99m Tc-TF single-photon emission …
Get MoreThallium-201 Brain SPECT. Thallium-201 imaging was performed 0–11 days (mean, 4.3 days) after brain CT or MR imaging. Brain SPECT was obtained 30 minutes after intravenous injection of 5 mCi (185 MBq) of thallium-201 by using a low-energy, general-purpose parallel-hole collimator, 360° circular orbit, and 15 seconds per stop for a total of 128 stops on …
Get MoreTHALLIUM-201 SCINTIGRAPHY. All patients underwent radionuclide imaging about six weeks after infarction. At peak exercise, 74 MBq 201 Tl was injected intravenously, and patients were encouraged to continue exercising for a further minute whenever possible. Images were acquired by a mobile gamma camera (Elscint, 205M) attached with a low energy ...
Get MoreThallium, a chemical element with the symbol TI, has an atomic number 81 on the periodic table. Thallium sulfate was once used as an ant and rat poison.[1][2][3] The occupational limit for thallium exposure is 0.1 mg/m^3 to the skin for eight hours a day. Levels of 15 mg/m^3 are considered immediately dangerous to one's health. Thallium is readily absorbed through …
Get MoreThallium (Tl) 201 and technetium (Tc) 99m tetrofosmin single-photon emission CT are routinely used in the evaluation of coronary artery disease. Mediastinal tumors demonstrate Tl 201 and Tc 99m tetrofosmin uptake. We report a 56-year-old man who developed chest pain after a previously successful angioplasty and stent of the left anterior descending …
Get MoreFrom October 1983 to January 1985, 46 patients (38 men and 8 women; average age, 60 years; range, 37 to 83 years) underwent peripheral vascular surgery of either the internal carotid artery or the arteries of the lower limbs. Each patient had a thorough clinical examination, an ECG, and a dipyridamole-thallium-201 myocardial scan before operation.
Get MoreThe myocardial uptake and redistribution in thallium scintigraphy and the regional wall motion by echocardiography were evaluated by a semi-quantitative method in 42 patients who previously had myocardial infarction (50 target vessels) and underwent coronary revascularization. The aim of this study was to elucidate the significance of the initial image, delayed image and …
Get MoreAll surgical patients underwent dipyridamole thallium-201 scintigraphy before PTx. Patients with abnormal thallium scan results were referred for cardiology consultation. The decision to perform further evaluations and interventions was at the discretion of the surgeons and cardiologists, who were experts in coronary catheterization.
Get MoreOf the 62 patients who underwent 201Tl imaging studies, 24 were found to have positive results, with local recurrence or distant metastases. Patients with positive results in the 201Tl imaging studies tended to be older, were mor often male, had higher Tg levels and had a higher recurrence rate.
Get MoreThallium-201 (201Tl) uptake and redistribution kinetics were examined in an open-chest canine preparation of occlusion and reperfusion. Seven dogs (group I) underwent 3 hr of sustained occlusion and received 1.5 mCi of 201Tl after 40 min of occlusion of the left anterior descending coronary artery (LAD).
Get MoreTHALLIUM-201 SPECT. Imaging was performed 15 minutes after a 74 MBq injection of thallium-201 with pretreatment with 500 μg of glyceryl trinitrate. All images were obtained at the 80 keV photo peak with 30% window, and the digital data were stored on a 128 × 128 matrix.
Get MorePace, L, Perrone-Filardi, P, Mainenti, PP. Effects of myocardial revascularization on regional thallium-201 uptake and systolic function in regions with reverse redistribution on tomographic thallium-201 imaging at rest in patients with chronic coronary artery disease. J Nucl Cardiol. 1998;5: 153 – 160. Google Scholar | Crossref
Get MoreAll patients underwent exercise four hour redistribution thallium-201 SPECT and positron emission tomography using fluorine-18-fluorodeoxyglucose (FDG) and nitrogen-13 ammonia under fasting conditions. Results Sixteen patients showed exercise induced ST elevation ⩾ 1.5 mm, and 15 of these had increased FDG uptake in the infarct region. ...
Get MoreTwenty patients underwent myocardial imaging with Thallium-201 (201Tl) before and subsequent to coronary artery bypass grafting. All patients had rest and maximal treadmill exercise imaging postoperatively. Eleven of the 20 patients had rest and exercise 201Tl images preoperatively; 9/20 only had rest imaging preoperatively.
Get MoreWe examined correlations between nuclear tracer avidity and malignancy grade in cartilage tumours. Between 1996 and 2000, 92 consecutive patients with cartilaginous tumours (50 benign, 42 non-metastatic malignant) underwent nuclear scanning. Thallium-201 (TL-201) and pentavalent dimercaptosuccinic acid (DMSAV) were used as nuclear isotopes.
Get MoreAll patients underwent coronary angiography and serial thallium-201 imaging either at rest (10 patients) or after submaximal exercise stress (42 patients; target heart rate 120 beats/min). Two or three vessel disease was designated if abnormal thallium-201 uptake or washout patterns, or both, were seen in two or three vascular segments ...
Get MoreSmaller MIBI defect sizes, when compared with TI-201, in the exercise and redistribution studies were not due to technical artefacts since there was no difference when they were compared at rest. Defect size on myocardial tomograms was measured in 30 patients who underwent 2 separate studies, 1 with thallium-201 (TI-201), the other with technetium-99m …
Get MoreImmediate poststress thallium-201 reinjection followed by imaging one hour later has been proposed as an alternative reinjection protocol. This procedure is patient-convenient and time-saving as it shortens the investigation time to maximally 2.5 hours. The efficacy of the immediate thallium-201 reinjection protocol was assessed in 305 patients with stress perfusion defects in …
Get MoreObjective To investigate the relations between myocardial metabolism and the kinetics of thallium-201 in myocardial scintigraphy. Methods 46 patients within six weeks after the onset of acute myocardial infarction underwent resting myocardial dual isotope, single acquisition, single photon emission computed tomography (SPECT) using radioiodinated 15-iodophenyl 3-methyl …
Get MoreObjective This retrospective study aims to evaluate the diagnostic capacity of thallium-201 (201Tl) scintigraphy for differentiating malignant bone tumors from benign bone lesions. Methods Between January 2006 and December 2012, 279 patients with bone lesions (51 malignant and 228 benign) underwent 201Tl scintigraphy before treatment. To evaluate 201Tl …
Get MoreThallium-201 chloride (Tl-201) scintigraphy showed an uptake of Tl-201 into the mass at early scan at 10 minutes after injection, which slightly decreased but still accumulated at 2 hours later (Fig. 2). The patient underwent a resection of tumor for a tentative diagnosis of neurilemoma of degenerative type ("ancient Schwannoma").
Get MoreThe ability of exercise thallium-201 tomographic imaging to predict the presence of left main or 3-vessel coronary artery disease (CAD) was examined in 688 …
Get MoreThe value of stress thallium-201 single photon emission CT imaging as a predictor of outcome and long-term prognosis after CABG ... major surgical and nonsurgical cardiac events and cardiac event-free survival in 170 patients who underwent CABG. Ten (5.8%) patients died during follow-up: 4 had a documented cardiac death (all of them with large ...
Get Moreunderwent myocardial thallium-201 scintigraphy. Six patients with myocardial thallium-201 defects were classified into group A and another 19 without defects were classified into group B. Between group A and B, we compared the results of other nonin vasive examinations, including standard 12-lead ECG, ...
Get Morecranial head and neck underwent thallium-201 SPECT imaging and contrast-enhanced CT. A neuroradiologist and nuclear medicine physician with knowledge of the primary site evaluated all thallium-201 studies for abnormal radiotracer uptake at the primary site. These results were correlated with histologic findings and clinical follow-up in all ...
Get MoreThe prognostic value of thallium-201 imaging in patients with unstable angina is not well established. Forty consecutive patients with unstable angina who had responded to medical therapy underwent predischarge symptom-limited exercise testing and 39 of them underwent exercise thallium-201 imaging, on average 3 days after the exercise test.
Get MoreAbstract. BACKGROUND: Thallium-201 has been widely used in clinical practice for the management of coronary heart disease, but little is known regarding its kinetics in the acute phase of myocardial infarction. CASE REPORT: We report a 78-year-old man who developed acute inferior myocardial infarction during exercise thallium-201 scintigraphy. The …
Get MoreThe right ventricle was visualized by thallium-201 myocardial imaging 5-15 minutes after the stabilization period, but not to the same degree as in the dogs that underwent acute banding of the pulmonary artery.
Get MoreForty-one patients with chest pain and suspected coronary artery disease underwent thallium-201 myocardial imaging, performed immediately following maximal treadmill exercise, also at "redistribution" 4--5 hr after exercise, and at rest 1 wk later. All had coronary angiography.
Get MoreThallium-201 (201 Tl) uptake and redistribution kinetics were examined in an open-chest canine preparation of occlusion and reperfusion.Seven dogs (group I) underwent 3 hr of sustained occlusion and received 1.5 mCi of 201 Tl after 40 min of occlusion of the left anterior descending coronary artery (LAD). Group II (n = 18) underwent 60 min of LAD occlusion followed by …
Get MoreAll patients underwent myocardial thallium-201 scintigraphy. Six patients with myocardial thallium-201 defects were classified into group A and another 19 without defects were classified into group B. Between group A and B, we compared the results of other noninvasive examinations, including standard 12-lead ECG, 24 h ambulatory ECG, chest ...
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