Non-contrast-enhanced MR-angiography of the abdominal arteries: intraindividual comparison between relaxation-enhanced angiography without contrast and triggering (REACT) and 4D contrast-enhanced MR-angiography.

IF 2.3 3区医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Abdominal Radiology Pub Date : 2024-10-28 DOI:10.1007/s00261-024-04639-4

Carsten Gietzen, Jan Paul Janssen, Lukas Görtz, Kenan Kaya, Thorsten Gietzen, Roman Johannes Gertz, Henry Pennig, Katharina Seuthe, David Maintz, Philip S Rauen, Thorsten Persigehl, Kilian Weiss, Lenhard Pennig

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Abstract

Purpose: To evaluate Relaxation-Enhanced Angiography without Contrast and Triggering (REACT), a novel 3D isotropic flow-independent non-contrast-enhanced magnetic resonance angiography (non-CE-MRA) for imaging of the abdominal arteries, by comparing image quality and assessment of vessel stenosis intraindidually with 4D CE-MRA.

Methods: Thirty patients (mean age 35.7 ± 16.8 years; 20 females) referred for the assessment of the arterial abdominal vasculature at 3 T were included in this retrospective, single-centre study. The protocol comprised both 4D CE-MRA and REACT (navigator-triggering, Compressed SENSE factor 10, nominal scan time 02:54 min, and reconstructed voxel size 0.78 × 0.78 × 0.85 mm³). Two radiologists independently evaluated 14 abdominal artery segments for stenoses, anatomical variants, and vascular findings (aortic dissection, abdominal aorta aneurysms and its branches). Subjective image quality was assessed using a 4-point Likert scale (1 = non-diagnostic, 4 = excellent).

Results: REACT had a total acquisition time of 5:36 ± 00:40 min, while 4D CE-MRA showed a total acquisition time (including the native scan and bolus tracking sequence) of 3:45 ± 00:59 min (p = 0.001). Considering 4D CE-MRA as the reference standard, REACT achieved a sensitivity of 87.5% and specificity of 100.0% for relevant (≥ 50%) stenosis while detecting 89.5% of all vascular findings other than stenosis. For all vessels combined, subjective vessel quality was slightly higher in 4D CE-MRA (3.0 [IQR: 2.0; 4.0.]; P = 0.040), although comparable to REACT (3.0 [IQR: 2.0; 3.5]).

Conclusion: In a short scan time of about 5 min, REACT provides good diagnostic performance for detection of relevant stenoses, variants, and vascular findings of the abdominal arteries, while yielding to 4D CE-MRA comparable image quality.

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腹部动脉非造影剂增强磁共振血管造影术：无造影剂和触发的弛豫增强血管造影术（REACT）与四维造影剂增强磁共振血管造影术的个体内比较。

目的：通过比较图像质量和腹腔内血管狭窄评估，评估用于腹部动脉成像的新型三维各向同性不依赖血流的非对比度增强磁共振血管成像（非 CE-MRA）--无对比度和触发的弛豫增强血管成像（REACT）：这项回顾性单中心研究纳入了 30 名转诊患者（平均年龄 35.7 ± 16.8 岁；20 名女性），他们需要在 3 T 下对腹部动脉血管进行评估。研究方案包括 4D CE-MRA 和 REACT（导航仪触发、压缩 SENSE 因子 10、标称扫描时间 02:54 分钟、重建体素大小 0.78 × 0.78 × 0.85 mm3）。两名放射科医生独立评估了 14 个腹部动脉节段的狭窄、解剖变异和血管发现（主动脉夹层、腹主动脉瘤及其分支）。主观图像质量采用 4 点李克特量表进行评估（1 = 无诊断性，4 = 优秀）：REACT的总采集时间为5:36±00:40分钟，而4D CE-MRA的总采集时间（包括原始扫描和栓剂跟踪序列）为3:45±00:59分钟（p = 0.001）。将 4D CE-MRA 作为参考标准，REACT 对相关（≥ 50%）狭窄的灵敏度为 87.5%，特异性为 100.0%，同时能检测到 89.5% 除狭窄以外的所有血管发现。就所有血管而言，4D CE-MRA 的主观血管质量略高（3.0 [IQR: 2.0; 4.0.]; P = 0.040），但与 REACT（3.0 [IQR: 2.0; 3.5]）相当：结论：在约 5 分钟的短扫描时间内，REACT 对腹部动脉相关狭窄、变异和血管发现的检测具有良好的诊断性能，其图像质量与 4D CE-MRA 相当。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Abdominal Radiology Medicine-Radiology, Nuclear Medicine and Imaging

CiteScore

5.20

自引率

8.30%

发文量

334

期刊介绍： Abdominal Radiology seeks to meet the professional needs of the abdominal radiologist by publishing clinically pertinent original, review and practice related articles on the gastrointestinal and genitourinary tracts and abdominal interventional and radiologic procedures. Case reports are generally not accepted unless they are the first report of a new disease or condition, or part of a special solicited section. Reasons to Publish Your Article in Abdominal Radiology: · Official journal of the Society of Abdominal Radiology (SAR) · Published in Cooperation with: European Society of Gastrointestinal and Abdominal Radiology (ESGAR) European Society of Urogenital Radiology (ESUR) Asian Society of Abdominal Radiology (ASAR) · Efficient handling and Expeditious review · Author feedback is provided in a mentoring style · Global readership · Readers can earn CME credits