JPS5455496A - Current seam - Google Patents
Current seamInfo
- Publication number
- JPS5455496A JPS5455496A JP12203877A JP12203877A JPS5455496A JP S5455496 A JPS5455496 A JP S5455496A JP 12203877 A JP12203877 A JP 12203877A JP 12203877 A JP12203877 A JP 12203877A JP S5455496 A JPS5455496 A JP S5455496A
- Authority
- JP
- Japan
- Prior art keywords
- coils
- order
- seam
- gradient
- magnetic field
- 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 form a seam having a reduced gradient of unnecessarily high order over a wide range by additionally interposing a pair of auxiliary coils between opposed concentric coils for a current seam for compensating the magnetic field distribution in a magnetic resonance device.
CONSTITUTION: There are provided inside of a pair of opposed magnetic poles M and M' coils E0 and E0, of a C-shaped seam for compensating the round magnetic field of second order, which is located about the coils M and M', such that the magnetic field generated has not gradient of fourth order but gradients of second and sixth orders. There are also provided inside of the coils E0 and E0, coils F0 and F0, for auxiliary seams which are concentric to but have a smaller radius than the C seam coins E0 and E0 and which have no gradient of fourth order. If a reverse current to that flowing through the coils E0 and E0 is supplied, the gradient of the magnetic field of an order higher than sixth order is compensated so that the compensated gradient of second order becomes substantially equal over a wide range. As a result, it is possible to improve the resolution during the measurement of magnetic resonance type. Incidentally, similar results can also be obtained for a linear seam
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12203877A JPS5455496A (en) | 1977-10-12 | 1977-10-12 | Current seam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12203877A JPS5455496A (en) | 1977-10-12 | 1977-10-12 | Current seam |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5455496A true JPS5455496A (en) | 1979-05-02 |
JPS6118695B2 JPS6118695B2 (en) | 1986-05-14 |
Family
ID=14826050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12203877A Granted JPS5455496A (en) | 1977-10-12 | 1977-10-12 | Current seam |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5455496A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61743A (en) * | 1984-06-13 | 1986-01-06 | Shimadzu Corp | Nmr imaging apparatus |
-
1977
- 1977-10-12 JP JP12203877A patent/JPS5455496A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61743A (en) * | 1984-06-13 | 1986-01-06 | Shimadzu Corp | Nmr imaging apparatus |
JPH0568253B2 (en) * | 1984-06-13 | 1993-09-28 | Shimadzu Corp |
Also Published As
Publication number | Publication date |
---|---|
JPS6118695B2 (en) | 1986-05-14 |
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