Deep learning-based magnetic resonance imaging reconstruction for improving the image quality of reduced-field-of-view diffusion-weighted imaging of the pancreas

Table 5 The results of quantitative assessments

Quantitative assessments	mean ± SD			P values
				Friedman test	Bonferroni post-hoc test
	FOCUS-DLR+	FOCUS-DLR-	FOCUS-conv		FOCUS-DLR+ vs FOCUS-DLR-	FOCUS-DLR+ vs FOCUS-conv	FOCUS-DLR- vs FOCUS-conv
CRpancreas-fat on FOCUS with b value of 600 s/mm2	0.68 ± 0.08	0.49 ± 0.10	0.27 ± 0.11	< 0.0011	< 0.0011	< 0.0011	< 0.0011
CRpancreas-fat on FOCUS with b value of 0 s/mm2	0.72 ± 0.08	0.65 ± 0.08	0.40 ± 0.11	< 0.0011	< 0.0011	< 0.0011	< 0.0011
CRlesion-pancreas on FOCUS with b value of 600 s/mm2	0.51 ± 0.26	0.62 ± 0.21	0.01 ± 0.26	< 0.0011	< 0.0011	< 0.0011	< 0.0011
CRlesion-pancreas on FOCUS with b value of 0 s/mm2	0.53 ± 0.21	0.62 ± 0.21	0.17 ± 0.19	< 0.0011	< 0.0011	< 0.0011	< 0.0011
ADCpancreas+ (× 10-3 mm2/s)	1.44 ± 0.24	1.39 ± 0.22	1.84 ± 0.45	< 0.0011	< 0.0011	< 0.0011	< 0.0011
ADClesion (× 10-3 mm2/s)	3.00 ± 0.66	2.86 ± 0.61	3.32 ± 0.70	< 0.0011	< 0.0011	< 0.0011	< 0.0011

¹A significant difference.

mean ± SD were calculated from the combined data of two radiologists' measurements. All CRs are presented in absolute values. 95%CI: 95% confidence intervals; DLR: Deep learning-based reconstruction; FOCUS: Field-of-view optimized and constrained undistorted single-shot; FOCUS-conv: Conventional field-of-view optimized and constrained undistorted single-shot; ADC: Apparent diffusion coefficient; MPD: Main pancreatic duct; CR: Contrast ratio.