Abstract We investigate the accuracy of direct attenuation correction (AC) in image domain for myocardial perfusion SPECT (single-photon emission computed tomography) imaging (MPI-SPECT) using residual (ResNet) and UNet deep convolutional neural networks. MPI-SPECT 99mTc-sestamibi images 99 patients were retrospectively included. ResNet networks trained non-attenuation-corrected as input, where...

Background: Left ventricular mechanical dyssynchrony (LVMD) can be induced after stress test. However, no studies have compared the influence of different stress‑inducing methods on LVMD parameters. Aims: The aim study was to determine whether there is a difference between exercise and adenosine triphosphate (ATP) tests in terms changes parameters assessed using gated single‑photon emission com...

BACKGROUND Experimental animal studies have demonstrated that myocardium at risk, residual collateral flow, and duration of coronary artery occlusion are important determinants of final infarct size. The present study examined these variables in patients with acute myocardial infarction in relation to final infarct size. METHODS AND RESULTS Myocardium at risk was assessed with hexakis(2-metho...

Objectives. Studies comparing outcome of single-(99m)Tc-methoxyisobutylisonitrile ((99m)Tc-sestamibi) and dual-tracer (99m)Tc-sestamibi scintigraphy in combination with (123)I before primary surgery of primary hyperparathyroidism (PHPT) are scarce. Methods. We compared (99m)Tc-sestamibi/(123)I and (99m)Tc-sestamibi in a single-centre retrospective series of 269 PHPT patients. The results were r...