JPS6468247A - Magnetic resonance apparatus - Google Patents
Magnetic resonance apparatusInfo
- Publication number
- JPS6468247A JPS6468247A JP62225918A JP22591887A JPS6468247A JP S6468247 A JPS6468247 A JP S6468247A JP 62225918 A JP62225918 A JP 62225918A JP 22591887 A JP22591887 A JP 22591887A JP S6468247 A JPS6468247 A JP S6468247A
- Authority
- JP
- Japan
- Prior art keywords
- impedance matching
- impedance
- control circuit
- high frequency
- fine adjustment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
PURPOSE:To shorten the time required in impedance matching, by automatically determining an initial value optimum in the impedance matching state of a high frequency coil according to an object to be measured before performing fine adjustment in the vicinity of said initial value. CONSTITUTION:The impedance matching conditions of high frequency coils 5, 6 different according to an object to be measured are preliminarily stored into the memory within a computer 3 as a plurality of initial values. At first, the variable condensers of impedance matching devices 11, 12 are controlled to the capacity values according to initial setting conditions by an impedance control circuit 13. Continuously, the fine adjustment of the impedance matching devices 11, 12 is performed by an impedance detector 14 and the impedance control circuit 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225918A JPS6468247A (en) | 1987-09-09 | 1987-09-09 | Magnetic resonance apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225918A JPS6468247A (en) | 1987-09-09 | 1987-09-09 | Magnetic resonance apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6468247A true JPS6468247A (en) | 1989-03-14 |
Family
ID=16836925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62225918A Pending JPS6468247A (en) | 1987-09-09 | 1987-09-09 | Magnetic resonance apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6468247A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0637131A1 (en) * | 1993-07-29 | 1995-02-01 | Nec Corporation | Microwave amplifier having a variable-impedance impedance matching circuit |
JP2002034953A (en) * | 2000-06-29 | 2002-02-05 | Siemens Ag | Method of operating magnetic resonance imaging apparatus |
JP2013505044A (en) * | 2009-09-17 | 2013-02-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multi-element RF transmitter coil for MRI with local automatic adjustment and matching circuit |
JP2014525336A (en) * | 2011-09-07 | 2014-09-29 | コーニンクレッカ フィリップス エヌ ヴェ | Magnetic resonance system and noise figure reduction method |
-
1987
- 1987-09-09 JP JP62225918A patent/JPS6468247A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0637131A1 (en) * | 1993-07-29 | 1995-02-01 | Nec Corporation | Microwave amplifier having a variable-impedance impedance matching circuit |
JP2002034953A (en) * | 2000-06-29 | 2002-02-05 | Siemens Ag | Method of operating magnetic resonance imaging apparatus |
JP2013505044A (en) * | 2009-09-17 | 2013-02-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multi-element RF transmitter coil for MRI with local automatic adjustment and matching circuit |
JP2014525336A (en) * | 2011-09-07 | 2014-09-29 | コーニンクレッカ フィリップス エヌ ヴェ | Magnetic resonance system and noise figure reduction method |
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