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

Table 2 Image-quality scores in the qualitative assessment

Qualitative assessment	1	2	3	4
Sharpness of the pancreas contour	Entire pancreas contour is unclear	< 50% of the pancreas contour is clear	≥ 50% of the pancreas contour is clear	Entire pancreas contour is clear
Image noise	Severe noise; no visualization of any organs	Moderate noise; compromised diagnostic capability of FOCUS is more than ≥ 50% of the image	Mild noise; compromised the diagnostic capability of FOCUS is < 50% of the image	No or slight noise on the image
Distortion of the pancreas	Severe distortion; no visualization of the whole pancreas	Moderate distortion; no visualization is ≥ 50% of the pancreas	Mild distortion; no visualization is < 50% of the pancreas	No distortion of the pancreas
Visualization of pancreas cystic lesion	No visualization of pancreas cystic lesion	Pancreas cystic lesion is visible, but its SI is low	Pancreas cystic lesion is visible with high SI, but its contour is unclear	Pancreas cystic lesion is clearly visible with high SI and clear contour
Visualization of MPD on ADC map	No visualization of MPD	Visible MPD is < 50% of the pancreas	Visible MPD is ≥ 50% of the pancreas	Whole MPD is visible

MPD: Main pancreatic duct; ADC: Apparent diffusion coefficient; SI: Signal intensity; FOCUS: Field-of-view optimized and constrained undistorted single-shot.