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

Murer, Sophie; Scheidler, Juergen; Mueller-Lisse, Ulrike L.; Helling, Marissa; Scherr, Michael; Mueller-Lisse, Ullrich G.

doi:10.1186/s41747-019-0111-8

European Radiology Experimental

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 1			With air-filled ERC, site 2			With PFC-filled ERC, site 2
	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value
T2WI	16.0 ± 1.3	16.7 ± 2.2	0.605	15.4 ± 2.9	9.0 ± 1.3	0.047	12.2 ± 1.7	11.8 ± 0.4	0.655
DWI_reduced b = 50	4.0 ± 1.2	7.0 ± 2.1	0.153	6.2 ± 3.3	8.3 ± 1.6	0.401	8.2 ± 1.5	9.3 ± 3.0	0.339
DWI_reduced b = 800	4.6 ± 3.4	6.0 ± 1.0	0.625	9.9 ± 2.4	9.5 ± 2.3	0.596	9.7 ± 2.4	8.0 ± 1.6	0.085
DWI_reduced ADC	7.2 ± 1.3	29.5 ± 12.9	0.113	12.9 ± 2.9	40.3 ± 22.5	0.203	13.6 ± 6.2	56.8 ± 9.1	0.040
Kiwifruit, outer pericarp	ERC air site 1 versus site 2					ERC air versus PFC site 2
	SNR, anterior, p value		SNR, posterior, p value			SNR, anterior, p value		SNR, posterior, p value
T2WI	0.600		0.007			0.347		0.091
DWI_reduced b = 50	0.502		0.577			0.446		0.759
DWI_reduced b = 800	0.011		0.214			0.841		0.077
DWI_reduced ADC	0.109		0.563			0.849		0.260
Kiwifruit, peripheral placenta (n = 3 × 2 ROIs)	With air-filled ERC, site 2			With air-filled ERC, site 2			With PFC-filled ERC, site 2
	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value	SNR, anterior (mean ± SD)	SNR, posterior (mean ± SD)	p value
T2WI	9.8 ± 2.8	9.7 ± 3.3	0.831	7.5 ± 0.7	8.7 ± 0.7	0.115	6.0 ± 0.6	7.0 ± 2.0	0.370
DWI_reduced b = 50	5.9 ± 2.0	6.0 ± 0.6	0.970	9.2 ± 1.1	7.4 ± 1.4	0.163	8.9 ± 1.3	5.9 ± 0.8	0.069
DWI_reduced b = 800	7.0 ± 0.9	5.3 ± 1.4	0.247	9.9 ± 0.9	8.0 ± 2.8	0.238	11.8 ± 2.2	6.8 ± 1.2	0.070
DWI_reduced ADC	22.5 ± 8.4	21.8 ± 7.5	0.853	28.5 ± 12.3	23.2 ± 9.7	0.718	25.0 ± 13.0	25.9 ± 3.9	0.882
Kiwifruit, peripheral placenta	ERC air site 1 versus site 2					ERC air versus PFC site 2
	SNR, anterior, p value		SNR, posterior, p value			SNR, anterior, p value	SNR, posterior, p value
T2WI	0.324		0.565			0.148	0.378
DWI_reduced b = 50	0.211		0.297			0.825	0.336
DWI_reduced b = 800	0.108		0.230			0.257	0.406
DWI_reduced ADC	0.377		0.851			0.155	0.763

p values were obtained using Student’s t test for paired samples
ADC apparent diffusion coefficient, DWI_reduced 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

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