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Table 4 Signal-to-noise ratios in one kiwifruit examined with an endorectal coil filled with air at both site 1 and site 2, and with perfluorocarbon in site 2

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

Kiwifruit, outer pericarp (n = 3 × 2 ROIs)With air-filled ERC, site 1With air-filled ERC, site 2With PFC-filled ERC, site 2
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p value
T2WI16.0 ± 1.316.7 ± 2.20.60515.4 ± 2.99.0 ± 1.30.04712.2 ± 1.711.8 ± 0.40.655
DWIreduced b = 504.0 ± 1.27.0 ± 2.10.1536.2 ± 3.38.3 ± 1.60.4018.2 ± 1.59.3 ± 3.00.339
DWIreduced b = 8004.6 ± 3.46.0 ± 1.00.6259.9 ± 2.49.5 ± 2.30.5969.7 ± 2.48.0 ± 1.60.085
DWIreduced ADC7.2 ± 1.329.5 ± 12.90.11312.9 ± 2.940.3 ± 22.50.20313.6 ± 6.256.8 ± 9.10.040
Kiwifruit, outer pericarpERC air site 1 versus site 2ERC air versus PFC site 2
SNR, anterior, p valueSNR, posterior, p valueSNR, anterior, p valueSNR, posterior, p value
T2WI0.6000.0070.3470.091
DWIreduced b = 500.5020.5770.4460.759
DWIreduced b = 8000.0110.2140.8410.077
DWIreduced ADC0.1090.5630.8490.260
Kiwifruit, peripheral placenta (n = 3 × 2 ROIs)With air-filled ERC, site 2With air-filled ERC, site 2With PFC-filled ERC, site 2
SNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p valueSNR, anterior (mean ± SD)SNR, posterior (mean ± SD)p value
T2WI9.8 ± 2.89.7 ± 3.30.8317.5 ± 0.78.7 ± 0.70.1156.0 ± 0.67.0 ± 2.00.370
DWIreduced b = 505.9 ± 2.06.0 ± 0.60.9709.2 ± 1.17.4 ± 1.40.1638.9 ± 1.35.9 ± 0.80.069
DWIreduced b = 8007.0 ± 0.95.3 ± 1.40.2479.9 ± 0.98.0 ± 2.80.23811.8 ± 2.26.8 ± 1.20.070
DWIreduced ADC22.5 ± 8.421.8 ± 7.50.85328.5 ± 12.323.2 ± 9.70.71825.0 ± 13.025.9 ± 3.90.882
Kiwifruit, peripheral placentaERC air site 1 versus site 2ERC air versus PFC site 2
SNR, anterior, p valueSNR, posterior, p valueSNR, anterior, p valueSNR, posterior, p value
T2WI0.3240.5650.1480.378
DWIreduced b = 500.2110.2970.8250.336
DWIreduced b = 8000.1080.2300.2570.406
DWIreduced ADC0.3770.8510.1550.763
  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 endorectal coil, PFC perfluorocarbon, ROI region of interest, SD standard deviation, SNR signal-to-noise ratio, T2WI T2-weighted turbo-spin-echo imaging