分子影像学杂志2025，Vol.48Issue(6)：706-710,5.DOI:10.12122/j.issn.1674-4500.2025.06.07
稀疏-线性填充STAR-VIBE序列K空间实现自由呼吸肝脏动态增强
Sparse-linear filling STAR-VIBE sequence K-space implementation for free-breathing dynamic enhancement of the liver
李友 1余丽珠 1张树桐1
作者信息
- 1. 华中科技大学同济医学院附属武汉中心医院影像科,湖北 武汉 430014
- 折叠
摘要
Abstract
Objective To optimize the STAR-VIBE sequence and explore its clinical application value for multi-phase dynamic contrast-enhanced liver imaging under free-breathing conditions.Methods Ninety-six patients with liver enhancement magnetic resonance scanning in Wuhan Central Hospital from March 2022 to July 2024 were included,and were divided into the group with normal breath-holding function(n=48)and the group with breath-holding obstacle(n=48)using group-control design according to whether the patients were able to hold their breath for 15 s.Both groups underwent free-breathing dynamic contrast-enhanced STAR-VIBE scanning with delayed-phase imaging,alongside conventional breath-hold T1-VIBE delayed enhancement scanning.The accuracy of dynamic phase visualization was evaluated using a double-blind method.Image quality of the delayed phase was quantitatively assessed using a 5-point scale,with statistical intergroup comparisons.Signal intensity(SI)values of liver parenchyma,erector spinae muscle,and background noise were measured at identical anatomical levels(avoiding vessels and lesions)on delayed-phase STAR-VIBE and T1-VIBE images.Liver signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)were calculated for both sequences.Results Two cases exhibited indistinct arterial and portal venous phase differentiation,yielding an overall phase accuracy of 98%.In the normal breath-holding group,there was no statistically significant difference in image quality scores between STAR-VIBE and T1-VIBE in the delayed phase(P>0.05),both achieving good diagnostic quality(STAR-VIBE:4.66±0.59,T1-VIBE:4.83±0.37).In the impaired breath-holding group,scores differed significantly between the two sequences(P<0.05).Delayed-phase STAR-VIBE image quality remained consistently good across both groups,with no intergroup statistical difference(P>0.05).SNR and CNR analysis revealed no significant differences between STAR-VIBE and T1-VIBE in the normal breath-holding group(P>0.05),whereas significant differences were observed in the impaired breath-holding group(P<0.05).There was no statistical significance in SNR/CNR between the two groups(P>0.05).Conclusion The optimized STAR-VIBE sequence enables diagnostically acceptable multi-phase dynamic contrast-enhanced liver imaging under free-breathing conditions,providing an effective imaging evaluation protocol for patients with limited breath-holding capacity.关键词
STAR-VIBE/自由呼吸/肝脏动态增强/K空间Key words
starvibe/free breathing/liver dynamic enhancement/K space引用本文复制引用
李友,余丽珠,张树桐..稀疏-线性填充STAR-VIBE序列K空间实现自由呼吸肝脏动态增强[J].分子影像学杂志,2025,48(6):706-710,5.
