摘要
目的:探讨膝关节低场磁共振的最佳检查方法。方法:在76例77个膝关节MRI检查中,冠状面图像的第一定位线是在横断面图像上内、外侧髁后缘连线的平行线;第二定位线是在矢状面图像上以胫骨髁间隆起的上缘为中心做股骨-胫骨长轴的平行线。矢状面图像的第一定位线是在冠状面图像上内、外侧半月板中心连线的垂线向外上内下倾斜,第二定位线是在横断面上内、外侧髁后缘连线的垂线向内前外后倾斜。结果:冠状面显示半月板、侧副韧带最佳,矢状面显示半月板、交叉韧带最佳,矢状面第一定位线平均倾斜角度(-x±s)为6.9°±1.3°,第二定位线倾斜角度平均为5.8°±1.4°。结论:在做膝关节MRI检查时,矢状面扫描双定位线的角度和方向要做适当调整,以便清晰显示前交叉韧带。
ObJective;To study the optimal scanning method of the knee joint in low field MRI. Methods： In the MR scanning of 77 knee joints of 76 patients, the first orientation lines of coronal scan were the lines paralleling to the drawing line between the posterior margins of the internal and external condyles on the transversal image of the knee joint. The second orientation lines of coronal scan were the lines paralleling to the long axis of femur and tibia centered on the top of the intercondyloid eminence of the tibia on sagittal image of the knee joint. The first orientation lines of the sagittal scan were the lines with a small tilted angle with the upside outward relative to the lines perpendicular to the connection line between the centers of the medial and lateral menisci on the coronal image. The second orienta- tion lines of the sagittal scan were the lines with a small tilted angle with the front inward relative to the lines perpendicular to the drawing line between the posterior margins of the internal and extemal condyles on the transversal image. Results： The menisci and accessory ligaments can be best shown on the coronal images of the knee. The menisci, anterior and posterior eruciate ligaments can be best shown on the sagittal images of the knee. In the sagittal scanning, the average tilted angles （ x^- ＋ s ） of the first and the second orientation lines were 6.9° ± 1.3° and 5.8° ± 1.4°. Conclusion：The angles and the directions of the double orientation lines in sagittal MRI scanning of the knee joint must be changed so as to depict the anterior cruciate ligament clearly.
出处
《医学影像学杂志》
2008年第11期1314-1316,共3页
Journal of Medical Imaging
关键词
膝关节
前交叉韧带
磁共振成像
Knee joint
Anterior eruciate ligament
Magnetic resonance imaging
