Fig. 9
From: MLAA-based attenuation correction of flexible hardware components in hybrid PET/MR imaging
Results for RF experiment: activity. a Sagittal views of attenuation maps and corresponding activity distributions. Neglecting headphone attenuation (uncorrected) results in an activity underestimation compared to the CT-based reconstruction (CTAC) for regions in close vicinity of the attached RF coil. Correction for RF coil attenuation using xMLAA compensates for the activity underestimation. The activity difference images in the bottom row give the relative difference to the CT-based reconstruction. b Average activity values evaluated within the phantom for coronal planes with varying y-position. Plotted are the coronal planes with plane numbers 140 to 190, as indicated in (a). The activity underestimation present when neglecting headphone attenuation (uncorrected) decreases with increasing distance from the coil. xMLAA results in a slight overestimation of below 1.5% for all coronal planes