Comparison and prediction of artefact severity due to total hip replacement in 1.5 T versus 3 T MRI of the prostate
Comparison and prediction of artefact severity due to total hip replacement in 1.5 T versus 3 T MRI of the prostate
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DOI：
10.1016/j.ejrad.2021.109949
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发表时间：
2021-09-16
影响因子：
3.3
通讯作者：
Schimmoller, L.
中科院分区：
文献类型：
--
作者：
Boschheidgen, M.;Ullrich, T.;Schimmoller, L.
目的：评价1.5和3 T下全髋关节置换术（THR）患者多参数前列腺MRI（mpMRI）的图像质量和诊断价值。方法：在这项回顾性多中心队列研究中，纳入了单侧或双侧THR和1.5 T或3 T mpMRI患者。评价了每种场强70次连续标准治疗检查的诊断价值。评估总体诊断价值和前列腺成像质量评分（PI-QUAL）。采用3分量表对定位器和mpMRI序列（T2 w、DWI、DCE）中的脑梗死严重程度进行评分。分析了伪影与诊断价值的相关性。此外，亚组分析侧重于不同3 T扫描仪代的图像质量。结果：纳入了140例连续患者（平均年龄72岁，中位PSA值8.3 ng/ml）。当比较1.5 T与3 T检查时，在DWI和定位器的伪影严重度以及图像的总体诊断价值方面没有观察到显著差异。定位器和DWI的诊断价值、PI-QUAL评分和伪影严重度之间存在强相关性。T2 w和DCE序列显示总体低伪影。观察到最新一代扫描仪的3 T图像质量显著改善，尤其是DWI（p < 0.03）。结论：THR患者的MpMRI可以在两种场强下进行，伪影无显著差异。定位器可能作为诊断价值的早期预测特征，特别是用于造影剂应用决策。THR患者可以从技术先进的扫描仪生成和rs/ptx-EPI DWI序列中受益。
Purpose: To evaluate image quality and diagnostic value of multiparametric prostate MRI (mpMRI) in patients with total hip replacement (THR) at 1.5 and 3 Tesla. Methods: In this retrospective multicenter cohort study patients with uni-or bilateral THR and 1.5 T or 3 T mpMRI were included. Seventy consecutive, standard-of-care examinations per field strength were evaluated regarding their diagnostic value. The overall diagnostic value and prostate imaging quality score (PI-QUAL) were assessed. Artifact severity in the localizer and mpMRI sequences (T2w, DWI, DCE) was scored on a 3-point scale. Correlation between diagnostic value and artifacts was analysed. Moreover, a subgroup analysis focussed on image quality at different 3 T scanner generations. Results: 140 consecutive patients (mean age 72, median PSA value 8.3 ng/ml) were included. When comparing 1.5 T to 3 T examinations, no significant differences were observed regarding the artifact severity of DWI and the localizer and the overall diagnostic value of the images. There was a strong correlation between the diagnostic value, PI-QUAL score, and artifact severity in the localizer and DWI. T2w and DCE sequences showed overall low artifacts. Significant improvement in image quality for 3 T at the latest scanner generation was observed, especially for DWI (p < 0.03). Conclusions: MpMRI of patients with THR can be conducted at both field strengths without significant differences in artifacts. The localizer might be useful as an early forecasting feature for diagnostic value and particularly for contrast medium application decision. Patients with THR could benefit from technically advanced scanner generation and rs/ptx-EPI DWI sequences.