Study on the optimal compression sensing acceleration factor for MRI image quality

Abstract

Abstract: Objective To explore the optimal compression sensing (CS) acceleration factor for the image quality of magnetic resonance cholangiopancreatography (MRCP). Methods 60 patients underwent MRCP between October 2021 and October 2023 were retrospectively analyzed. Conventional 3D-MRCP and CS-3D-MRCP (CS18, CS24, CS32) were performed respectively, and objective image analysis was performed by Philips image post-processing workstation. Subjective image analysis was performed by two senior radiologists according to the five-point method. Kappa test was used to analyze the consistency of subjective evaluation results of image quality, and the display score and image sharpness of pancreaticobiliary duct were compared among the four groups, and the display situation and scanning time of pancreaticobiliary duct were compared among the four groups. Results The SD and SNR scores of CS32 group were (38.4±3.0) and (40.4±2.8), they were significantly lower than SENSE4 [(44.3±3.5), (43.9±3.2)], CS18 [(43.2±4.2), (44.5±4.0)] and CS24 [(43.0±3.1), (46.2±5.2)]. The CNR score of CS32 was (8.2±1.3), which was significantly higher than SENSE4 (7.4±1.4), CS18 (7.7±1.3), CS24 (7.8±1.0), respectively, the difference was statistically significant (P<0.05). There was no statistical difference in SD、SNR、CNR scores among SENSE4、CS18 and CS24 (P>0.05). The subjective scores of SENSE4, CS18, CS24 and CS32 of the two observers are consistent (Kappa=0.792, 0.719, 0.800, 0.734, P<0.05). The image sharpness, common bile duct, common hepatic duct, cystic duct, left hepatic duct and right hepatic duct in CS32 group were (3.01±0.70), (3.40±0.45), (3.30±0.53), (3.15±0.53), (2.76±0.65), (2.85±0.60), they were significantly lower than SENSE4 [(3.75±0.42), (3.80±0.35), (3.90±0.21), (3.75±0.43), (3.55±0.47) and (3.50±0 0.47)], CS18 [(3.70±0.48), (3.95±0.15), (3.85±0.33), (3.80±0.43), (3.45±0.49), (3.55±0.45)], CS24 [(3.65±0.44), (3.76±0.35), (3.85±0.35), (3.60±0.45), (3.45±0.48), (3.35±0.41)], the difference was statistically significant (P<0.05). There was no statistical difference between the last three groups (P>0.05). The scanning time of SENSE4, CS18, CS24 and CS32 groups is 186s, 23s, 14s and 12s, respectively. Conclusion Collecting MRCP image information with CS technology can shorten the scanning time on the premise of ensuring the imaging quality, with CS24 was identified as the best acceleration factor.

Key words: Magnetic resonance cholangiopancreatography, Image quality, Compression sensing, Optimum acceleration factor

WANG Yue-rong, LI Ke-ke, JING Hong. Study on the optimal compression sensing acceleration factor for MRI image quality[J]. Chinese Hepatolgy, 2025, 30(8): 1147-1150.

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