Fig. 7
From: Practical issues and limitations of brain attenuation correction on a simultaneous PET-MR scanner
Transverse images a–c, coronal images d–f. a, d PET image acquired with pads in place. b, e Difference between PET images with/without pads attached to phantom. c, f Subtraction of two PET images acquired back to back. Dotted white lines represent the position of the pads in a, b, d and e. Dotted red lines in c show the positions of ROIs used to make measurements given in Table 1