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Table 3 Image quality (IQ) assessed by two independent observers on axial T2WI and DWI/ADC for both combined rigid phased-array endorectal coil and an external phased-array coil (ERC-PAC) and PAC acquisitions

From: Prostate MRI using a rigid two-channel phased-array endorectal coil: comparison with phased array coil acquisition at 3 T

Image sharpness/structure detail
 ◦ Definition: Clear depiction of prostate edge or degree of blurring, clarity of border delineation, peripheral-transition zone boundary, and the extent of lesion definition and internal morphologic features
 ◦ Scores: 1, non-diagnostic; 2, poor; 3, satisfactory; 4, good; and 5, excellent sharpness/detail.
Motion artifact
 ◦ Definition: Presence and severity of image blurring due to patient motion
 ◦ Scores: 1, non-diagnostic; 2, severe; 3, moderate; 4, mild; and 5, motion free
Anatomic distortion
 ◦ Definition: Distortion in size, profile, or orientation of the prostate using T2W as a reference
 ◦ Scores: 1, non-diagnostic; 2, severe; 3, moderate; 4, mild; and 5, no distortion
Ghosting/susceptibility artifacts
 ◦ Definition: Displaced reduplications of image or structure that propagate in phase encoding direction
 ◦ Scores: 1, non-diagnostic; 2, severe; 3, moderate; 4, mild; and 5, no ghosting/susceptibility
Coil related phase artifacts
 ◦ Definition: Displaced reduplications of the endorectal coil that propagate in phase encoding direction
 ◦ Scores: 1, non-diagnostic; 2, severe; 3, moderate; 4, mild; and 5, no coil artifact
Overall image quality
 ◦ Scores: 1, non-diagnostic; 2, poor; 3, satisfactory; 4, good; and 5, excellent image quality