Claims
- 1. A method of imaging blood flows by means of a magnetic resonance imaging apparatus which includes means for generating a static magnetic field and gradient magnetic fields, means for generating a high-frequency (RF) magnetic field, means for detecting magnetic resonance signals from a body under test, and means for implementing an image-reproducing computation on the detected signals, said method comprising the steps of:
- exciting selectively a partial region of said test body including a blood vessel portion;
- measuring resonance signals by utilizing spins flowing out of said excited region; and
- imaging a blood vessel system based on blood flow information included in the measured resonance signals,
- wherein said partial region is set to a region which includes a region formed by extending a view field plane and is outside of the view field.
- 2. A blood flow imaging method according to claim 1, wherein said measurement of resonance signals is implemented in a multi-echo mode.
- 3. A blood flow imaging method according to claim 2, wherein imaging is implemented by adding blood flow information reproduced from each of the signals measured in said multi-echo mode.
- 4. A blood flow imaging method according to claim 1, wherein said process of selective excitation includes a process of applying RF pulses successively.
- 5. A blood flow imaging method according to claim 4, wherein said RF pulses are applied for a variable number of times in a variable applying angle.
- 6. A blood flow imaging method according to claim 5, wherein said number of applying and angle of applying are varied depending on the portion to be scanned of said test body.
- 7. A blood flow imaging method according to claim 1, wherein said portion of selective excitation includes a part of the heart.
- 8. A blood flow imaging method according to claim 1, wherein said measuring process is synchronous with a pulsation of the heart.
- 9. A blood flow imaging method according to claim 1, wherein a flow velocity is measured on the basis of said blood flow information.
- 10. A method of imaging blood flows by means of a magnetic resonance imaging apparatus which includes means for generating a static magnetic field and gradient magnetic fields, means for generating a high-frequency (RF) magnetic field, means for detecting magnetic resonance signals from a body under test, and means for implementing an image-reproducing computation on the detected signals, said method comprising the steps of:
- exciting selectively a partial region of said test body including a blood vessel portion;
- measuring resonance signals by utilizing spins flowing out of said excited region; and
- imaging a blood vessel system based on blood flow information included in the measured resonance signals,
- wherein said spins have a major flow direction set to a phase-encode direction and said partial region is set to a region which includes a region formed by extending a view field plane and is outside of the view field.
- 11. A blood flow imaging method according to claim 10, wherein said process of selective excitation includes a process of applying RF pulses successively.
- 12. A blood flow imaging method according to claim 11, wherein said RF pulses are applied for a variable number of times in a variable applying angle.
- 13. A blood flow imaging method according to claim 12, wherein said number of applying and angle of applying are varied depending on the portion to be scanned of said test body.
- 14. A method of imaging blood flows by means of a magnetic resonance imaging apparatus which includes means for generating a static magnetic field and gradient magnetic fields, means for generating a high-frequency (RF) magnetic field, means for detecting magnetic resonance signals from a body under test, and means for implementing an image-reproducing computation on the detected signals, said method comprising the steps of:
- exciting selectively a partial region of said test body including a blood vessel portion;
- measuring resonance signals by utilizing spins flowing out of said excited region; and
- imaging a blood vessel system based on blood flow information included in the measured resonance signals,
- wherein said spins have a major flow direction set to a read-out direction and said partial region is set to a region which includes a region formed by extending a view field plane and is outside of the view field.
- 15. A blood flow imaging method according to claim 14, wherein said process of selective excitation includes a process of applying RF pulses successively.
- 16. A blood flow imaging method according to claim 15, wherein said RF pulses are applied for a variable number of times in a variable applying angle.
- 17. A blood flow imaging method according to claim 16, wherein said number of applying and angle of applying are varied depending on the portion to be scanned of said test body.
- 18. A blood flow imaging method according to claim 14, wherein said portion of selective excitation includes a part of the heart.
- 19. A blood flow imaging method according to claim 14, wherein said measuring process is synchronous with a pulsation of the heart.
- 20. A blood flow imaging method according to claim 14, wherein a flow velocity is measured on the basis of said blood flow information.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-18385 |
Jan 1987 |
JPX |
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Parent Case Info
This application is a Continuation of application Ser. No. 149,503, filed Jan. 28, 1988 now abandoned.
US Referenced Citations (6)
Continuations (1)
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Number |
Date |
Country |
Parent |
149503 |
Jan 1988 |
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