Respiratory motion leads to blur and artifacts in single-photon emission computed tomography (SPECT) images. This may be an issue some treatments such as liver radioembolization. The purpose of this work was reconstruct 4-D respiration-gated SPECT images using a data-driven approach. A respiratory signal extracted from list-mode data Laplacian eigenmaps used for retrospective phase gating. meth...

OBJECTIVE SPECT has become a routine procedure in most nuclear medicine departments. SPECT provides significant technical challenges for the nuclear medicine technologist, as compared with planar imaging, in the areas of SPECT acquisition, image reconstruction, and data processing. Many new advances in SPECT methodology are becoming available, such as iterative reconstruction, multimodality fus...

OBJECTIVES To evaluate the relationship between serial cardiac troponin T (cTnT) levels with infarct size and left ventricular ejection fraction by gated single-photon emission computed tomography myocardial perfusion imaging (SPECT-MPI) in patients with acute myocardial infarction (AMI). BACKGROUND Current guidelines recommend the use of cTnT as the biomarker of choice for the diagnosis of A...

Myocardial ischemia may occur during an exercise session in cardiac rehabilitation programs. However, it has not been established whether it is elicited when exercise prescription is based on heart rate corresponding to the anaerobic threshold as measured by cardiopulmonary exercise testing. Our objective was to determine the incidence of myocardial ischemia in cardiac rehabilitation programs a...

Abstract Background False negative myocardial perfusion images on single-photon emission computed tomography (SPECT) imaging (MPI) is a substantial problem in the interpretation of MPI. To explore possible parameters from gated SPECT that could detected coronary artery disease (CAD) patients with normal images, we retrospectively selected who underwent 2-day Tc-99 m MIBI adenosine stress/rest M...

OBJECTIVE Gamma cameras contain energy discriminators that allow only those photons within a specified energy range to be recorded. A spontaneous shift in peak of 1 head of a dual-head gamma camera may cause artifacts. We present our experience with the incidental occurrence of off-peak status in 1 head of a dual-head gamma camera that resulted in subsequent artifacts and poor-quality images. ...

Various diagnostic imaging modalities have been used for quantitative left ventricular (LV) parameters. Because of the suboptimal value of the most widely used technology, two-dimensional (2D) echocardiography, 3D ultrasonographic imaging has improved accuracy for LV volume and function. Single photon emission computed tomography (SPECT) is another diagnostic method where LV volumetric and func...

BACKGROUND Exercise gated single-photon emission computed tomography (SPECT) using technetium-99m (99mTc)-sestamibi evaluates both myocardial perfusion during stress and wall motion >30 min after the stress, which has the potential to assess not only exercise-induced myocardial ischemia but also the development of myocardial stunning. METHODS AND RESULTS To evaluate the incidence of post-stre...

Over the past two decades, advancements in nuclear cardiac imaging have greatly improved the overall evaluation of patients surviving acute myocardial infarction (AMI). Initially used only to detect the presence of AMI in patients with an unclear clinical diagnosis, nuclear cardiac imaging has matured into a technique that can now accurately assess individual patient risk among seemingly stable...

OBJECT This study was designed to assess the value of gated SPECT Tc-99m-tetrofosmin (TF) wall thickening (WT) in addition to TF exercise (Ex)/rest myocardial SPECT, in comparison with F-18 fluorodeoxyglucose (FDG)-PET. METHODS The study population consisted of 33 patients with old myocardial infarction (27 men and 6 women; mean age, 62 +/- 8 years old). All patients underwent Ex/rest TF SPEC...