Suzuki Kazufumi, Masukawa Ai, Aoki Sachiko, Arai Yasuko, Ueno Eiko
Department of Radiology, Medical Center East, Tokyo Women's Medical University, Tokyo, Japan.
Acta Otolaryngol. 2010 May;130(5):568-75. doi: 10.3109/00016480903317473.
We developed a new coordinates system for magnetic resonance imaging (MRI) that utilizes the labyrinth and eyeballs as references to measure the spatial arrangement of cranial organs, and we verified its usefulness by observing small structures in the labyrinth in 39 ears from 33 patients. Our new coordinates system could be used for stereotactic analysis of cranial organs in MRI.
To research semicircular canal anatomy in healthy organisms, we propose a method that employs references visible on MRI for stereotactic measurement of cranial structures, and we evaluated the usefulness of our method.
Using the new coordinates system and vector analysis, we calculated angles among the semicircular canals and sagittal head plane from MRI volume data containing temporal bone and orbit.
The angle between the anterior semicircular canal plane and sagittal plane was 35.3 +/- 4.1 degrees; posterior semicircular canal plane and sagittal plane, 50.9 +/- 4.7 degrees; and horizontal semicircular canal plane and sagittal plane, 90.4 +/- 7.0 degrees. The angle between the anterior and posterior semicircular canal planes was 95.1 +/- 4.2 degrees; anterior and horizontal semicircular canal planes, 92.3 +/- 7.5 degrees; and posterior and horizontal semicircular canal planes, 93.5 +/- 4.9 degrees.
我们开发了一种用于磁共振成像（MRI）的新坐标系，该坐标系利用迷宫和眼球作为参考来测量颅骨器官的空间排列，并通过观察33例患者39只耳朵迷宫中的微小结构验证了其有效性。我们的新坐标系可用于MRI中颅骨器官的立体定向分析。
为研究健康生物体中的半规管解剖结构，我们提出了一种利用MRI上可见参考物对颅骨结构进行立体定向测量的方法，并评估了该方法的有效性。
使用新坐标系和矢量分析，我们从包含颞骨和眼眶的MRI容积数据中计算了半规管与矢状头平面之间的角度。
前半规管平面与矢状平面之间的角度为35.3±4.1度；后半规管平面与矢状平面之间的角度为50.9±4.7度；水平半规管平面与矢状平面之间的角度为90.4±7.0度。前半规管平面与后半规管平面之间的角度为95.1±4.2度；前半规管平面与水平半规管平面之间的角度为92.3±7.5度；后半规管平面与水平半规管平面之间的角度为9
