JPS6425841A - Examination method using nuclear magnetic resonance - Google Patents
Examination method using nuclear magnetic resonanceInfo
- Publication number
- JPS6425841A JPS6425841A JP62181121A JP18112187A JPS6425841A JP S6425841 A JPS6425841 A JP S6425841A JP 62181121 A JP62181121 A JP 62181121A JP 18112187 A JP18112187 A JP 18112187A JP S6425841 A JPS6425841 A JP S6425841A
- Authority
- JP
- Japan
- Prior art keywords
- ratio
- measurement
- image
- nuclear spins
- chemical shifts
- 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.)
- Granted
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
PURPOSE:To enhance the S/N ratio of a chemical shift image, by obtaining an image, wherein a plurality of chemical shifts are superposed, by one image sensing. CONSTITUTION:The signals from the nuclear spins corresponding to at least two or more chemical shifts are observed simultaneously. As one embodiment, when the signals from the nuclear spins corresponding to (n-1) chemical shifts are simultaneously detected by one measurement, only the nuclear spin corresponding to chemical shift of one kind respectively different in each measurement is selectively excited and the contribution to a signal is removed by phase dispersion. When the number of times of measurement are set to n-times, respective nuclear spins are measured (n-1) times. Therefore, the S/N ratio of an obtained image is given by formula (4). That is, since noise has no correlation between measurements, the S/N ratio becomes n<1/2> No. by n-time measurement whereas a signal becomes (n-1) times. The improvement rate of the S/N ratio is given by formula (5) from formulae (3), (4). As a result, when n>=3 is formed, the above-mentioned improvement rate becomes larger than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62181121A JP2619398B2 (en) | 1987-07-22 | 1987-07-22 | Inspection equipment using nuclear magnetic resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62181121A JP2619398B2 (en) | 1987-07-22 | 1987-07-22 | Inspection equipment using nuclear magnetic resonance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425841A true JPS6425841A (en) | 1989-01-27 |
| JP2619398B2 JP2619398B2 (en) | 1997-06-11 |
Family
ID=16095221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62181121A Expired - Fee Related JP2619398B2 (en) | 1987-07-22 | 1987-07-22 | Inspection equipment using nuclear magnetic resonance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2619398B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168041A (en) * | 1983-12-14 | 1985-08-31 | ゼネラル・エレクトリツク・カンパニイ | Nmr picture forming method |
-
1987
- 1987-07-22 JP JP62181121A patent/JP2619398B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168041A (en) * | 1983-12-14 | 1985-08-31 | ゼネラル・エレクトリツク・カンパニイ | Nmr picture forming method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2619398B2 (en) | 1997-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |