Furthermore, no significant differences have been found in the assessment of tumor grade using advanced techniques such as PWI [ 12], MRS [ 13, 14], and DWI [ 9, 15].
Second, novel MR techniques including MR elastography [5 7], MR DWI [10 12], T1ρ MR imaging [13 15], and MR PWI [16, 17] have emerged for detecting liver fibrosis.
The total scanning time for six MRS acquisitions (30 20), a T1-weighted volumetric spoiled gradient-recall echo sequence (5 39), T1- (1:39) and T2-weighted scans (1 11), an fMRI run (3:12), and DWI (3:44) was 44 65.
Moreover T2WI with DWI also yielded higher interreader agreement than any other combination tested (k = 0.17 0.20 for T2WI alone, k = 0.55 0.63 for T2W and DWI, k = 0.32 0.34 for T2W and DCE, and k = 0.49 0.58 for T2WI, DWI, and DCEI).
They used different imaging sequences (T1w, T2w, DCE, DWI and T2*w), different radiofrequency coils and different contrast agents (gadolinium-based and USPIO).
Small FOV T2, DWI, and T1 post-contrast images identify nearly all PSMA-positive lymph nodes greater than 1 cm.
Open image in new window Fig. 3 DWI appearance of a small residual cholesteatoma confirmed on second-look surgery.
MRI included axial T2 weighted STIR, B0 mapping and 2 DWI single-shot EPI measurements (DWI1 and DWI2) with b values 0, 500 and 1000 mm2/s.
For Katayama et al. [15] and Fujii et al., [16], DWI respectively "is not useful" and "provide no additional information" in discriminating benign from malignant ovarian masses.
