BACKGROUND The additive prognostic value of tests done in a hierarchical order for the detection of coronary artery disease (CAD) is not always known. The principal goal of this study, therefore, was to assess the incremental prognostic value of data obtained in succession (clinical, exercise stress testing, 201Tl imaging, and coronary angiography) in patients with suspected CAD. A second goal ...

The object of this review is to provide information about (201)Tl-thallous chloride in radionuclide myocardial perfusion imaging. This technique has experienced a recent resurgence because of the shortage of (99m)Tc. After reading this article, the technologist will be able to describe the properties and uptake mechanism of (201)Tl, the procedure for myocardial perfusion imaging with this agent...

UNLABELLED BACKGROUND In single-photon emission computed tomography (SPECT), attenuation of photon flux in tissue affects quantitative accuracy of reconstructed images. Attenuation maps derived from X-ray computed tomography (CT) can be employed for attenuation correction. The attenuation coefficients as well as registration accuracy between SPECT and CT can be influenced by several factors....

Twenty 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. Postoperative regional exercise perfusion was improved in seven of the...

IN SQUAMOUS CELL CARCINOMA (SCC), some authors have reported that tumor angiogenesis is a prognostic factor in predicting the effect of treatment.1,2 There are some studies using microvessel density (MVD) in evaluating angiogenesis and showing the usefulness of MVD in predicting radiosensitivity in esophageal cancer,3 cervix carcinoma,4 and head and neck carcinoma.5–8 Furthermore, some authors ...

STUDY OBJECTIVE Data on the prevalence of myocarditis in children are limited. Autopsy studies have shown that myocarditis is often undiagnosed. We attempted to investigate the clinical features of asymptomatic myocarditis in four schoolchildren detected during a mass ECG screening in schoolchildren. DESIGN AND SETTING To evaluate asymptomatic myocarditis, we clinically examined 12 schoolchil...

One hundred and forty-nine patients with suspected ischaemic heart disease were evaluated by exercise thallium-201 myocardial scintigraphy (201Tl SMS), single lead exercise electrocardiography, and coronary arteriography. Myocardial distribution of tracer was assessed semi-quantitatively from digital 201Tl scintigrams and compared with tracer distribution in subjects with normal hearts. Fifty-t...

The predictive accuracy of exercise thallium-201 (201Tl) myocardial scintigraphy in the evaluation of aortocoronary bypass graft surgery was assessed in 48 patients undergoing angiographic investigation 15 months (mean time) after myocardial revascularisation. 201Tl scintigrams detected 61 out of 77 (79%) patent grafts but only 21 out of 42 (50%) occluded grafts, though, for grafts supplying no...