Lecouvet Frederic E, Claus Jérôme, Schmitz Patrick, Denolin Vincent, Bos Clemens, Vande Berg Bruno C
Department of Medical Imaging, Cliniques Cliniques Universitaires St Luc, Brussels, Belgium.
J Magn Reson Imaging. 2009 Jan;29(1):141-5. doi: 10.1002/jmri.21633.
To compare an automated scan planning method to manual scan positioning in routine knee magnetic resonance imaging (MRI) studies.
The automated scan planning method uses anatomical landmarks in a 3D survey of the knee. The method is trained by example plannings, consisting of manual slice positioning by an experienced technologist in 15 MRI studies. Automated knee MR examinations obtained in three geometries in 50 consecutive patients were compared to those obtained in 50 consecutive control patients, where imaging planes were planned manually. Anatomical coverage and slice angulation were scored for each geometry on a 4-grade scale by an experienced radiologist blinded to the way of planning; groups were compared using a Mann-Whitney U-test.
In 150 automated sequences the technologist adapted slice positioning in four cases (addition of slices to adapt to the size of the knee), representing the only automated sequences that received a poor rating. Thirteen sequences with manual planning received a poor rating. No difference in quality was found (P > 0.05) between automated and manual plannings for coronal coverage, sagittal coverage and angulation, and transverse angulation. Rating of automated planning was higher for transverse coverage, but lower than manual planning for coronal angulation.
Automated sequence prescription for knee MRI is feasible in clinical practice, with similar quality as manual positioning.
在常规膝关节磁共振成像（MRI）研究中，比较一种自动扫描规划方法与手动扫描定位。
自动扫描规划方法在膝关节的三维测量中使用解剖标志。该方法通过示例规划进行训练，示例规划由一位经验丰富的技术人员在15项MRI研究中进行手动切片定位组成。将50例连续患者以三种几何形状获得的自动膝关节MR检查结果与50例连续对照患者的结果进行比较，对照患者的成像平面是手动规划的。由一位对规划方式不知情的经验丰富的放射科医生以4级量表对每种几何形状的解剖覆盖范围和切片角度进行评分；使用Mann-Whitney U检验对各组进行比较。
在150个自动序列中，技术人员在4例中调整了切片定位（增加切片以适应膝关节大小），这是仅有的获得较差评分的自动序列。13个手动规划的序列获得了较差评分。在冠状面覆盖、矢状面覆盖、角度以及横断面角度方面，自动规划和手动规划之间在质量上未发现差异（P>0.05）。自动规划在横断面覆盖方面的评分较高，但在冠状面角度方面低于手动规划。
膝关节MRI的自动序列处方在临床实践中是可行的，质量与手动定位相似。
