Validation of prone myocardial perfusion SPECT with a variable-focus collimator versus supine myocardial perfusion SPECT with or without computed tomography-derived attenuation correction

Abstract

Fewer artificial defects were observed in the apex of images acquired by prone imaging than by S-CTAC imaging. Prone images improved attenuation and had similar defect decision as S-CTAC images in the anterior-anteroseptal, lateral, and inferior areas.

Combined supine and prone imaging acquisition in cardiac SPECT: A turn for the better

“…10 Indeed, even with a state-of-the-art SPECT-CT unit employing novel collimation and iterative reconstruction techniques, the addition of prone imaging may reduce the incidence of apical artifacts. 11 Therefore, combining supine and prone imaging routinely in those labs that do not yet employ attenuation correction fits well with an overall approach to improving quality. The technique represents a method that can increase diagnostic accuracy without increasing radiation exposure or incurring the expense of new equipment.…”

New techniques, distinctive population, unique normal databases

“…Acquisition times were 8 minutes. 21 Matsuo et al compared IQÁSPECT acquisitions of 6 minutes with a standard acquisition of 20 minutes finding that the images were of equivalent quality. They noted that CTAC improved inferior artifacts with some apparent decrease in anterior or apical anterior segments.…”

Introduction of nuclear medicine research in Japan

“…IQ-SPECT (Siemens) is a dedicated myocardial SPECT system, with a novel multifocal collimator, SMARTZOOM, and cardiocentric and 3D iterative SPECT reconstruction, that requires only 6 – 7 min for one scan. Two investigations of IQ-SPECT have recently been reported in Japan [6, 7]. …”

“…Takamura et al investigated prone 201 Tl imaging without CT-derived AC acquired by IQ-SPECT [7]. The study group comprised 39 patients who underwent 201 Tl stress imaging with IQ-SPECT.…”