DCE‐MRI of the liver with sub‐second temporal resolution using GRASP‐Pro with navi‐stack‐of‐stars sampling DOI
Jingjia Chen, Chenchan Huang, Krishna Shanbhogue

et al.

NMR in Biomedicine, Journal Year: 2024, Volume and Issue: 37(12)

Published: Sept. 25, 2024

Abstract Respiratory motion‐induced image blurring and artifacts can compromise quality in dynamic contrast‐enhanced MRI (DCE‐MRI) of the liver. Despite remarkable advances respiratory motion detection compensation past years, these techniques have not yet seen widespread clinical adoption. The accuracy image‐based be especially compromised presence contrast enhancement and/or situations involving deep irregular breathing patterns. This work proposes a framework that combines GRASP‐Pro (Golden‐angle RAdial Sparse Parallel with imProved performance) new radial sampling scheme called navi‐stack‐of‐stars for free‐breathing DCE‐MRI liver without need explicit compensation. A prototype 3D golden‐angle sequence intermittently acquires 2D navigator was implemented. Free‐breathing conducted 24 subjects at 3T including 17 volunteers 7 patients. reconstruction performed temporal resolution 0.34–0.45 s per volume, whereas standard GRASP 15 volume. Motion all tasks. Liver images different phases from both reconstructions were visually scored by two experienced abdominal radiologists comparison. nonparametric paired two‐tailed Wilcoxon signed‐rank test used to compare scores, Cohen's kappa coefficient calculated evaluate inter‐reader agreement. sub‐second consistently received significantly higher scores ( P < 0.05) than throughout across assessment categories. There substantial agreement categories (ranging 0.67 0.89). proposed technique using holds great promise

Language: Английский

DCE‐MRI of the liver with sub‐second temporal resolution using GRASP‐Pro with navi‐stack‐of‐stars sampling DOI
Jingjia Chen, Chenchan Huang, Krishna Shanbhogue

et al.

NMR in Biomedicine, Journal Year: 2024, Volume and Issue: 37(12)

Published: Sept. 25, 2024

Abstract Respiratory motion‐induced image blurring and artifacts can compromise quality in dynamic contrast‐enhanced MRI (DCE‐MRI) of the liver. Despite remarkable advances respiratory motion detection compensation past years, these techniques have not yet seen widespread clinical adoption. The accuracy image‐based be especially compromised presence contrast enhancement and/or situations involving deep irregular breathing patterns. This work proposes a framework that combines GRASP‐Pro (Golden‐angle RAdial Sparse Parallel with imProved performance) new radial sampling scheme called navi‐stack‐of‐stars for free‐breathing DCE‐MRI liver without need explicit compensation. A prototype 3D golden‐angle sequence intermittently acquires 2D navigator was implemented. Free‐breathing conducted 24 subjects at 3T including 17 volunteers 7 patients. reconstruction performed temporal resolution 0.34–0.45 s per volume, whereas standard GRASP 15 volume. Motion all tasks. Liver images different phases from both reconstructions were visually scored by two experienced abdominal radiologists comparison. nonparametric paired two‐tailed Wilcoxon signed‐rank test used to compare scores, Cohen's kappa coefficient calculated evaluate inter‐reader agreement. sub‐second consistently received significantly higher scores ( P < 0.05) than throughout across assessment categories. There substantial agreement categories (ranging 0.67 0.89). proposed technique using holds great promise

Language: Английский

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