Interactive Scan Control for Kinematic Study in Open MRI
スポンサーリンク
概要
- 論文の詳細を見る
Purpose: A tool to support the subject is generally used for kinematic joint imaging with an open MRI apparatus because of difficulty setting the image plane correctly. However, use of a support tool requires a complicated procedure to position the subject, and setting the image plane when the joint angle changes is time consuming. Allowing the subject to move freely enables better diagnoses when kinematic joint imaging is performed. We therefore developed an interactive scan control (ISC) to facilitate the easy, quick, and accurate setting of the image plane even when a support tool is not used. Methods: We used a 0.4T magnetic resonance (MR) imaging system open in the horizontal direction. The ISC determines the image plane interactively on the basis of fluoroscopy images displayed on a user interface. The imaging pulse is a balanced steady-state acquisition with rewound gradient echo (SARGE) sequence with update time less than 2 s. Without using a tool to support the knee, we positioned the knee of a healthy volunteer at 4 different joint angles and set the image plane through the patella and femur at each of the angles. Lumbar imaging is also demonstrated with ISC. Results: Setting the image plane was easy and quick at all knee angles, and images obtained clearly showed the patella and femur. Total imaging time was less than 10 min, a fourth of the time needed when a support tool is used. We also used our ISC in kinematic imaging of the lumbar. Conclusion: The ISC shortens total time for kinematic joint imaging, and because a support tool is not needed, imaging can be done more freely in an open MR imaging apparatus.
- 日本磁気共鳴医学会の論文
- 2007-12-31
著者
-
Goto Tomohiro
Application Development Department Mri System Division Hitachi Medical Corporation
-
Yamashita Yasuyuki
Kumamoto University Hospital
-
HAMADA Kiyomi
Clinical Application Department Marketing Division, Hitachi Medical Corporation
-
ITO Taeko
Clinical Application Department Marketing Division, Hitachi Medical Corporation
-
NAGAO Hisako
Application Development Department MRI System Division, Hitachi Medical Corporation
-
TAKAHASHI Tetsuhiko
Application Development Department MRI System Division, Hitachi Medical Corporation
-
HAYASHIDA Yoshiko
Kumamoto University Hospital
-
HIAI Yasuhiro
Kumamoto University Hospital
-
Ito Taeko
Clinical Application Department Marketing Division Hitachi Medical Corporation
-
Nagao Hisako
Application Development Department Mri System Division Hitachi Medical Corporation
-
Hamada Kiyomi
Clinical Application Department Marketing Division Hitachi Medical Corporation
-
Takahashi Tetsuhiko
Application Development Department Mri System Division Hitachi Medical Corporation
-
Yamashita Yasuyuki
Kumamoto Univ.
関連論文
- Interactive Scan Control for Kinematic Study in Open MRI
- Modified Echo Peak Correction for Radial Acquisition Regime (RADAR)