Fig. 6From: NEMA image quality phantom measurements and attenuation correction in integrated PET/MR hybrid imagingImages of the first five iterations reconstructed with 3D OP-OSEM for different matrix and Gaussian filter sizes and using CT-based AC. Note: increasing the number of iterations is associated with increasing lesion sharpness while also increasing background noise. This also applies when increasing the image matrix size from 172 x 172 to 344 x 344Back to article page