Table 2 Criteria for qualitative comparison of image quality in diffusion-weighted imaging in patients with bladder cancer

Susceptibility

 1: marked distortion was seen

 2: moderated distortion was seen

 3: little distortion was seen

 4: no distortion was seen

Detectability

 1: not visible

 2: partial visibility

 3: visibility

 4: excellent visibility

Motion artifact

 1: marked artifact

 2: moderate artifact

 3: slight artifact

 4: no artifact

Image blurring

 1: the bladder wall definition was not visible

 2: the bladder wall definition was partially visible

 3: the bladder wall definition was visible

 4: the bladder wall definition was clearly visible