Invention Grant
- Patent Title: Magnetic resonance examination apparatus and antenna device
- Patent Title (中): 磁共振检查仪和天线装置
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Application No.: US13577885Application Date: 2011-01-21
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Publication No.: US09182463B2Publication Date: 2015-11-10
- Inventor: Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
- Applicant: Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
- Applicant Address: JP Tokyo
- Assignee: Hitachi Medical Corporation
- Current Assignee: Hitachi Medical Corporation
- Current Assignee Address: JP Tokyo
- Agency: Miles & Stockbridge P.C.
- Priority: JP2010-041274 20100226
- International Application: PCT/JP2011/051122 WO 20110121
- International Announcement: WO2011/105143 WO 20110901
- Main IPC: G01R33/34
- IPC: G01R33/34

Abstract:
There is provided a technique for securing a comfortable examination space in a tunnel type MRI apparatus without increasing the manufacturing cost of the MRI apparatus and sacrificing performance thereof. In an RF coil provided with a hollow-shaped outer conductive element and a strip-shaped conductive element disposed along the outer conductive element in the axial direction, meander lines constituting the strip-shaped conductive element are disposed at uneven distances from the outer conductive element to secure an internal space. In order to obtain uniform sensitivity at the center of the RF coil, the strip-shaped conductive element is constituted with N of connected meander lines, and length of the strip-shaped conductive element is adjusted so that, in the strip-shaped conductive element resonating at resonance frequency of the antenna, nodes are formed in a number of (M+1)×N−1, wherein M is 0 or a natural number of 1 or larger.
Public/Granted literature
- US20120299594A1 ANTENNA DEVICE Public/Granted day:2012-11-29
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