JPS6415034A - Magnetic resonance imaging apparatus - Google Patents
Magnetic resonance imaging apparatusInfo
- Publication number
- JPS6415034A JPS6415034A JP62170685A JP17068587A JPS6415034A JP S6415034 A JPS6415034 A JP S6415034A JP 62170685 A JP62170685 A JP 62170685A JP 17068587 A JP17068587 A JP 17068587A JP S6415034 A JPS6415034 A JP S6415034A
- Authority
- JP
- Japan
- Prior art keywords
- respiration
- phase
- encoding
- magnetic field
- width
- 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
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
PURPOSE:To enhance respiration phase detection accuracy, by applying only a frequency encoding inclined magnetic field crossing the phase encoding direction of an adjacent slice to obtain a monitor signal and using the data obtained by the Fourier transform of the monitor signal to detect the respiration phase of an object to be examined. CONSTITUTION:Since monitoring RF transmitting pulses A1a, 2a excite adjacent slices, said pulses are shifted by DELTAf in frequency as compared with imaging RF transmitting pulses 1, 2. A slicing inclined magnetic field pulse B3a, a frequency encoding inclined magnetic field pulse D5a and a respiration monitoring echo signal E6a are a sequence added for monitoring respiration. In usual, a respiration monitor signal is obtained prior to an imaging sequence and subjected to Fourier transform. The spectrum width F at this time corresponds to the width in the frequency phase encording direction at the imaging time of an object to be examined and the phase of respiration is known on the basis of said width. At an imaging time, by setting a phase encoding inclined magnetic field GE to GE=GEOXDELTAFO/DELTAF, a respiratory moving artifact can be removed. Herein, GEO is encoding guantity and DELTAFO is the width in an encoding direction when there is no movement due to respiration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170685A JPS6415034A (en) | 1987-07-07 | 1987-07-07 | Magnetic resonance imaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170685A JPS6415034A (en) | 1987-07-07 | 1987-07-07 | Magnetic resonance imaging apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415034A true JPS6415034A (en) | 1989-01-19 |
Family
ID=15909495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62170685A Pending JPS6415034A (en) | 1987-07-07 | 1987-07-07 | Magnetic resonance imaging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415034A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190361082A1 (en) * | 2018-05-25 | 2019-11-28 | Oxford University Innovation Limited | Methods for monitoring motion using multi-transmit electrical coupling in imaging of the subject |
-
1987
- 1987-07-07 JP JP62170685A patent/JPS6415034A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190361082A1 (en) * | 2018-05-25 | 2019-11-28 | Oxford University Innovation Limited | Methods for monitoring motion using multi-transmit electrical coupling in imaging of the subject |
| US10928478B2 (en) * | 2018-05-25 | 2021-02-23 | Oxford University Innovation Limited | Methods for monitoring motion using multi-transmit electrical coupling in imaging of the subject |
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