Slipsager Jakob M, Glimberg Stefan L, Søgaard Jes, Paulsen Rasmus R, Johannesen Helle H, Martens Pernille C, Seth Alka, Marner Lisbeth, Henriksen Otto M, Olesen Oline V, Højgaard Liselotte
DTU Compute, Technical University of Denmark, Lyngby, Denmark.
Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
J Magn Reson Imaging. 2020 Sep;52(3):731-738. doi: 10.1002/jmri.27112. Epub 2020 Mar 7.
Patient head motion is a major concern in clinical brain MRI, as it reduces the diagnostic image quality and may increase examination time and cost.
To investigate the prevalence of MR images with significant motion artifacts on a given clinical scanner and to estimate the potential financial cost savings of applying motion correction to clinical brain MRI examinations.
Retrospective.
In all, 173 patients undergoing a PET/MRI dementia protocol and 55 pediatric patients undergoing a PET/MRI brain tumor protocol. The total scan time of the two protocols were 17 and 40 minutes, respectively.
FIELD STRENGTH/SEQUENCES: 3 T, Siemens mMR Biograph, MPRAGE, DWI, T and T -weighted FLAIR, T -weighted 2D-FLASH, T -weighted TSE.
A retrospective review of image sequences from a given clinical MRI scanner was conducted to investigate the prevalence of motion-corrupted images. The review was performed by three radiologists with different levels of experience using a three-step semiquantitative scale to classify the quality of the images. A total of 1013 sequences distributed on 228 MRI examinations were reviewed. The potential cost savings of motion correction were estimated by a cost estimation for our country with assumptions.
The cost estimation was conducted with a 20% lower and upper bound on the model assumptions to include the uncertainty of the assumptions.
7.9% of the sequences had motion artifacts that decreased the interpretability, while 2.0% of the sequences had motion artifacts causing the images to be nondiagnostic. The estimated annual cost to the clinic/hospital due to patient head motion per scanner was $45,066 without pediatric examinations and $364,242 with pediatric examinations.
The prevalence of a motion-corrupted image was found in 2.0% of the reviewed sequences. Based on the model, repayment periods are presented as a function of the price for applying motion correction and its performance.
4 TECHNICAL EFFICACY: Stage 6 J. Magn. Reson. Imaging 2020;52:731-738.
患者头部运动是临床脑部MRI中的一个主要问题，因为它会降低诊断图像质量，并可能增加检查时间和成本。
调查在给定临床扫描仪上具有明显运动伪影的MR图像的患病率，并估计对临床脑部MRI检查应用运动校正可能节省的潜在财务成本。
回顾性研究。
总共173例接受PET/MRI痴呆症检查方案的患者和55例接受PET/MRI脑肿瘤检查方案的儿科患者。这两个检查方案的总扫描时间分别为17分钟和40分钟。
场强/序列：3T，西门子mMR Biograph，MPRAGE、DWI、T加权和T加权FLAIR、T加权二维FLASH、T加权快速自旋回波。
对来自给定临床MRI扫描仪的图像序列进行回顾性审查，以调查运动受损图像的患病率。由三位经验水平不同的放射科医生使用三步半定量量表对图像质量进行分类。总共对分布在228次MRI检查中的1013个序列进行了审查。通过对我国进行成本估算并做出假设来估计运动校正的潜在成本节省。
成本估算在模型假设的上下限均降低20%的情况下进行，以纳入假设的不确定性。
7.9%的序列存在运动伪影，降低了图像的可解释性，而2.0%的序列存在运动伪影，导致图像无法诊断。在不包括儿科检查的情况下，每台扫描仪因患者头部运动给诊所/医院带来的估计年度成本为45,066美元；包括儿科检查时，这一成本为364,242美元。
在2.0%的审查序列中发现了运动受损图像的患病率。基于该模型，回报期表示为应用运动校正的价格及其性能的函数。
4级 技术效能：6级 《磁共振成像杂志》2020年；52:731-738。
