Table 1 Qualitative criteria for comparing image quality of TGSE and RESOLVE (b1000) sequences
From: Performance of TGSE BLADE DWI compared with RESOLVE DWI in the diagnosis of cholesteatoma
Image sharpness (anatomical structures: nasal sinus, ear, brain) | |
1. Completely unclear 2. Generally visible 3. Clearly visible | |
Geometric distortion â‘ Cholesteatoma (size and border) â‘¡ Whole image 1. Severe distortion 2. Moderate distortion 3. Mild distortion 4. No distortion | |
Ghosting artifacts (interface of cholesteatoma and the temporal lobe) 1. Severe artifact, unable to distinguish lesions and normal tissues 2. Moderate artifact, part of the lesion can be distinguished from normal tissues 3. Mild artifact, no impact on lesion diagnosis 4. No artifact | |
Overall image quality 1. Nondiagnostic 2. Barely diagnosis 3. Diagnostic 4. Good 5. Excellent |