Fig. 1

Example of quality control screens of MPS acquisitions with the D-SPECT camera. a Before starting the tomographic acquisition, a scout view is acquired that lasts 20–40 s to confirm that the detector arm is well positioned in the vertical axis and is close enough from the heart. The images located in the first row show that the detectors are well positioned in the vertical axis and include the whole heart in the field of view (left and middle images). Nevertheless, the heart (red circle, right image) is too far from the optimal position (circle with gray dotted line). Acquisition with the heart in this position may result in poor image quality. Efforts should be made to bring the detector arm closer from the chest and the heart of the patient. The duration of this low-dose stress acquisition after injection of a ^99mTc-labeled perfusion tracer was calculated at 8 min 42 s to reach an estimated LV myocardial count set at 1 million in the region of interest placed on the cardiac region on the scout view. b After the acquisition, a sinogram allows for the identification of patient movements in the horizontal axis and two panograms (for the two parts of the acquisitions separated by a movement of all the detectors in the arm) for the detection of movements in the vertical axis. Note the presence of patient movements in the vertical axis during the second part of the acquisition. In addition, the histogram shows all R-R intervals during the acquisition. Note the presence of abnormal short and long R-R intervals corresponding to extrasystolic and post-extrasystolic cardiac cycles. At the end of the acquisition, abnormal R-R intervals can be excluded from the gated reconstruction using the two red lines