Table 5.
ROI Size Range, Average ADC and CV Values in the Abdomen and Pelvis
| Tissue | ROI Size (Range of Number of Pixels) | 1.5 T |
3.0 T |
CV (1.5 T vs. 3.0 T) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| tDWI | dDWI | CV | tDWI | dDWI | CV | tDWI | dDWI | ||
| Liver | 43–55 | 1.24 ± 0.08 | 1.28 ± 0.03 | 2.6 | 1.32 ± 0.06 | 1.20 ± 0.19 | 6.8 | 5.6 | 9.1 |
| Gallbladder | 20–28 | 3.02 ± 0.09 | 3.06 ± 0.33 | 4.0 | 3.22 ± 0.49 | 3.23 ± 0.09 | 6.3 | 9.1 | 6.9 |
| Pancreas | 16–39 | 1.39 ± 0.01 | 1.43 ± 0.09 | 2.6 | 1.63 ± 0.26 | 1.36 ± 0.25 | 13.3 | 10.9 | 12.4 |
| Spleen | 36–51 | 0.86 ± 0.04 | 0.77 ± 0.03 | 7.6 | 0.76 ± 0.15 | 0.73 ± 0.01 | 10.0 | 9.1 | 4.1 |
| Renal cortex | 2–5 | 1.94 ± 0.05 | 1.96 ± 0.10 | 1.3 | 1.91 ± 0.10 | 1.88 ± 0.04 | 1.7 | 1.4 | 2.9 |
| Renal medulla | 4–7 | 1.85 ± 0.04 | 1.93 ± 0.17 | 5.5 | 1.90 ± 0.07 | 1.98 ± 0.11 | 2.9 | 1.7 | 7.1 |
| Prostate PZ | 9–12 | 1.07 ± 0.05 | 1.11 ± 0.00 | 2.5 | 1.15 ± 0.05 | 1.11 ± 0.03 | 2.6 | 4.7 | 1.4 |
| Prostate TZ | 10–13 | 0.90 ± 0.04 | 0.86 ± 0.02 | 2.7 | 0.94 ± 0.01 | 0.99 ± 0.11 | 5.7 | 3.4 | 9.5 |
| Urinary bladder | 34–86 | 1.93 ± 0.04 | 1.94 ± 0.01 | 0.6 | 2.34 ± 0.09 | 2.21 ± 0.29 | 4.6 | 13.5 | 8.6 |
This table presents the ROI size range, average ADC values (10−3 mm2/s), and CV values (%) between tDWI and dDWI and between 1.5 T and 3.0 T in abdominal and pelvic organs of 2 healthy volunteers. For organs/tissues in which multiple ROIs were drawn (ie, liver, pancreas, spleen, renal cortex, renal medulla, and prostate peripheral zone), the average values of all ROIs are listed.
Abbreviations: dDWI, diagonal diffusion-weighted imaging; PZ, peripheral zone; ROI, region of interest; tDWI, 3-scan trace diffusion-weighted imaging; TZ, transitional zone.