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Table 2 Signal-to-noise ratios in kiwifruits examined with and without an endorectal coil at site 1 (twelve corresponding regions of interest in anterior and posterior locations) and at site 2 (three corresponding regions of interest in anterior and posterior locations)

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

Kiwifruits, outer pericarp, site 1ERC, n = 12 × 2 ROIsnoERC, n = 12 × 2 ROIsERC versus noERC
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SDp valueSNR, anterior,p valueSNR, posterior,p value
T2WI14.2 ± 2.413.9 ± 3.70.74213.3 ± 2.413.1 ± 2.70.7630.4280.546
DWIreduced b = 504.8 ± 2.47.8 ± 2.70.0137.4 ± 4.08.2 ± 2.40.5410.0050.688
DWIreduced b = 8007.6 ± 7.17.3 ± 2.80.8947.0 ± 3.210.7 ± 4.70.0440.7360.047
DWIreduced ADC5.3 ± 2.221.9 ± 12.0< 0.00110.5 ± 5.534.1 ± 13.3< 0.0010.0020.024
Kiwifruits, outer pericarp, site 2ERC, n = 3 × 2 ROIsnoERC, n = 3 × 2 ROIsERC versus noERC
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SDp valueSNR, anterior, p valueSNR, posterior, p value
T2WI19.8 ± 5.117.4 ± 2.90.48514.5 ± 6.818.5 ± 6.70.2550.4810.691
DWIreduced b = 508.8 ± 1.57.1 ± 1.40.4216.6 ± 3.18.4 ± 1.50.1730.4630.178
DWIreduced b = 8005.3 ± 4.28.2 ± 1.20.4019.9 ± 0.57.8 ± 1.40.0760.2250.708
DWIreduced ADC10.8 ± 3.041.7 ± 13.10.0605.2 ± 0.626.7 ± 9.80.0710.0950.366
Kiwifruits, peripheral placenta, site 1ERC, n = 12 × 2 ROIsnoERC, n = 12 × 2 ROIsERC versus noERC
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SDp valueSNR, anterior, p valueSNR, posterior, p value
T2WI9.4 ± 3.98.6 ± 2.60.2517.8 ± 2.68.1 ± 2.90.7150.2850.496
DWIreduced b = 507.6 ± 4.36.1 ± 1.90.3329.1 ± 2.89.1 ± 4.90.9920.3790.066
DWIreduced b = 8007.8 ± 3.17.0 ± 3.10.58110.5 ± 2.911.5 ± 6.20.5290.0460.086
DWIreduced ADC15.1 ± 8.215.2 ± 8.60.94126.7 ± 16.125.5 ± 9.20.8100.0360.010
Kiwifruits, peripheral placenta, site 2ERC, n = 3 × 2 ROIsnoERC, n = 3 × 2 ROIsERC versus noERC
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior, p valueSNR, posterior, p value
T2WI9.0 ± 0.79.8 ± 3.50.7139.0 ± 0.710.4 ± 2.90.3910.9720.225
DWIreduced b = 507.1 ± 2.06.8 ± 0.20.8256.5 ± 1.88.7 ± 2.10.0100.1250.241
DWIreduced b = 8007.2 ± 1.36.9 ± 2.20.8618.6 ± 0.48.4 ± 1.60.8060.1830.450
DWIreduced ADC24.7 ± 2.235.6 ± 14.00.27722.5 ± 11.422.1 ± 4.30.9370.7290.251
  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 endorectal coil, noERC without endorectal coil, ROI region-of-interest, SD standard deviation, SNR signal-to-noise ratio, T2WI T2-weighted turbo-spin-echo imaging