Fig. 2
From: The effect of patient anxiety and depression on motion during myocardial perfusion SPECT imaging
a From inspection of the raw data (32 planar images) in cinematic display, which were acquired during the “delay phase” of MPI, a downward patient movement was detected. Using tracing lines at the edges of heart silhouette on each of the 32 planar views, the patient’s displacement (shift) was confirmed on images 19 to 23 (arrows). This is a “Patient Motion Delay” assessment classified as grade 2 (moderately severe motion). b The tomographic filtered back projection (FBP) reconstruction of the raw data illustrated on Fig. 2a, revealed a large myocardial apical defect perfusion, which was diagnosed as motion artifact (arrow). Conversely, no myocardial apical defect appeared after the tomographic reconstruction of the “stress phase” images (arrowhead), since the patient remained motionless during the data acquisition