Incremental Prognostic Value of Rest-Redistribution 201 Tl Single-Photon Emission Computed Tomography

Incremental Prognostic Value of Rest-Redistribution

Background—The incremental prognostic value of rest-redistribution Tl compared with stress and rest perfusion abnormalities has not been defined. Methods and Results—We identified 458 patients who underwent rest Tl /stress (exercise or adenosine) Tc sestamibi single-photon emission computed tomography (SPECT) and had late (18 to 24 hours) Tl imaging, were not revascularized within 60 days of SP...

Assessed by Quantitative Thallium-201 Single-Photon Emission Computed Tomography

The extent of abnormally perfused myocardium was compared in patients with and without chest pain during treadmill exercise from a large, relatively low-risk consecutive patient population (n=356) referred for quantitative thallium-201 single-photon emission computed tomography (SPECT). All patients had concurrent coronary angiography. Patients were excluded if they had prior coronary angioplas...

Single Photon Emission Computed Tomography

Predictive value of multislice computed tomography variables of atherosclerosis for ischemia on stress-rest single-photon emission computed tomography.

BACKGROUND previous studies have shown that the presence of stenosis alone on multislice computed tomography (MSCT) has a limited positive predictive value for the presence of ischemia on myocardial perfusion imaging (MPI). The purpose of this study was to assess which variables of atherosclerosis on MSCT angiography are related to ischemia on MPI. METHODS AND RESULTS both MSCT and MPI were p...

Lessons from the Tc-99m shortage: implications of substituting Tl-201 for Tc-99m single-photon emission computed tomography.

BACKGROUND In 2009, the Chalk River nuclear reactor closed for repairs that led to a critical shortage of technetium-99m (Tc-99m). Several centers used thallium-201 (Tl-201) as an alternative radiotracer for myocardial perfusion imaging. Because Tl-201 is considered by many as a suboptimal radiotracer, we sought to understand the impact of using Tl-201 (during the Tc-99m shortage) on downstream...