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Table 3 Signal-to-noise ratio in human prostates with benign hyperplasia examined with endorectal coil filled with air in site 2 (n = 66 corresponding regions of interests, in anterior and posterior locations, respectively), and without endorectal coil at site 1 (n = 60 corresponding regions of interest, in anterior and posterior locations, respectively)

From: Two-centre comparative experimental study of biparametric MRI at 3.0 T with and without endorectal coil using kiwifruit (Actinidia deliciosa) as a phantom for human prostate

Prostates, peripheral zoneERC, site 2, n = 66 × 2noERC, site 1, n = 60 × 2
 SNR, PZa (mean ± SD)SNR, PZpl (mean ± SD)p valueSNR, Pza (mean ± SD)SNR, PZpl (mean ± SD)p value
T2WI6.2 ± 2.67.0 ± 3.00.1054.4 ± 1.26.0 ± 2.8< 0.001
DWIreduced b = 504.9 ± 2.25.8 ± 3.00.0265.8 ± 4.25.4 ± 2.70.558
DWIreduced b = 8008.0 ± 4.311.0 ± 6.00.00112.6 ± 7.112.6 ± 6.50.964
DWIreduced ADC6.0 ± 2.38.2 ± 4.1< 0.0016.4 ± 4.49.3 ± 12.30.096
Prostates, transitional zoneERC, site 2, n = 66 × 2noERC, site 1, n = 60 × 2
 SNR, Tza (mean ± SD)SNR, TZp (mean ± SD)p valueSNR, Tza (mean ± SD)SNR, TZp (mean ± SD)p value
T2WI8.3 ± 3.57.6 ± 3.20.1555.1 ± 1.96.1 ± 6.40.218
DWIreduced b = 507.5 ± 2.87.1 ± 2.70.2928.4 ± 3.78.6 ± 3.90.688
DWIreduced b = 80013.5 ± 5.413.7 ± 5.00.79616.5 ± 5.816.5 ± 6.10.972
DWIreduced ADC9.4 ± 3.58.7 ± 3.60.2719.2 ± 3.511.1 ± 9.80.121
  1. p values were obtained using Student’s t test for paired samples
  2. ADC apparent diffusion coefficient, DWIreduced echo-planar diffusion-weighted imaging with reduced field of view and selective excitation, ERC with endo-rectal coil, noERC without endo-rectal coil, Pza anterior region of peripheral zone of human prostate, PZpl posterior-lateral region of peripheral zone of human prostate, SNR signal-to-noise ratio, T2WI T2-weighted turbo-spin-echo imaging, Tza anterior region of transitional zone of human prostate; TZp posterior region of transitional zone of human prostate