JPS645535A - Nuclear magnetic resonance diagnostic apparatus - Google Patents
Nuclear magnetic resonance diagnostic apparatusInfo
- Publication number
- JPS645535A JPS645535A JP62160496A JP16049687A JPS645535A JP S645535 A JPS645535 A JP S645535A JP 62160496 A JP62160496 A JP 62160496A JP 16049687 A JP16049687 A JP 16049687A JP S645535 A JPS645535 A JP S645535A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- gradient magnetic
- exciting
- magnetic field
- phase
- 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 an examination time and to enhance the examination efficiency of a patient, by properly setting the flip angle of an exciting RF pulse. CONSTITUTION:In an SE method, an exciting RF pulse is applied in such a state that a gradient magnetic field Gv for determining a tomographic surface is applied to perform the selective excitation only for magnetization in a certain tomographic surface. Continuously, the gradient magnetic fields Gf, Gphi of frequency encoding and phase encoding are applied. A 180 deg. RF pulse is applied TE/2 after the application of the exciting RF pulse in such a state that all of the gradient magnetic fields are not applied to reverse the phase of a spin. Thereafter, a spin echo signal is obtained from the 180 deg. RF pulse after TE/2 while the gradient magnetic field Gf is again applied. This obtained spin echo signal is detected in its phase to be digitalized and subjected to Fourier transform to make it possible to obtain the spectrum of an object to be examined. In order to obtain an actual image, a plurality of spin echo signals are obtained by changing the amplitude of the gradient magnetic field Gphi and subjected to two-dimensional Fourier transform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62160496A JPS645535A (en) | 1987-06-26 | 1987-06-26 | Nuclear magnetic resonance diagnostic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62160496A JPS645535A (en) | 1987-06-26 | 1987-06-26 | Nuclear magnetic resonance diagnostic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS645535A true JPS645535A (en) | 1989-01-10 |
Family
ID=15716193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62160496A Pending JPS645535A (en) | 1987-06-26 | 1987-06-26 | Nuclear magnetic resonance diagnostic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS645535A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020078756A (en) * | 2014-11-11 | 2020-05-28 | ハイパーファイン リサーチ，インコーポレイテッド | Pulse sequences for low-field magnetic resonance |
| US11333726B2 (en) | 2018-07-31 | 2022-05-17 | Hypefine Operations, Inc. | Low-field diffusion weighted imaging |
-
1987
- 1987-06-26 JP JP62160496A patent/JPS645535A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020078756A (en) * | 2014-11-11 | 2020-05-28 | ハイパーファイン リサーチ，インコーポレイテッド | Pulse sequences for low-field magnetic resonance |
| US11333726B2 (en) | 2018-07-31 | 2022-05-17 | Hypefine Operations, Inc. | Low-field diffusion weighted imaging |
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