Claims
- 1. A magnetic resonance image genrating apparatus comprising a first radiation source means for emitting pulse sequences of a first radiation of a frequency selected to excite nuclear spin transitions in selected nuclei in a sample being imaged, a second radiation source means for emitting a second radiation of a frequency selectd to excite elecron spin transitions coupled to the nuclear spin transitions of at least some of said selected nuclei, a primary magnet means for generating a substantially uniform nagnetic field, magnetic field gradient generating means for imposing a gradient on the magnetic field experienced by said sample during gradient imposition periods within said sequences, means for detecting free induction decay signals from said selected nuclei during detection periods within said sequences, and means for transforming said detected free induction decay signals into a magnetic resonance image of at least part of said sample, said second source means for emitting said second radiation during the delay period a final detection period of one of said sequences and an initial pulse of said first radiation in a subsequent sequence.
- 2. An apparatus as claimed in claim 1 wherein said means for transforming generates said image using only said free induction decay signals detected following emission of said first and second radiations by said first and second radiations by said first and second radiation source means.
- 3. An apparatus as claimed in claim 1 wherein said second radiation source means emits said second radiation as a continuous wave.
- 4. An apparatus as claimed in claim 1 wherein said second radiation source means emits said second radiation as a train of micropulses.
- 5. An apparatus as claimed in claim 1 wherein said second radiation source means emits said second radiation having at least two maxima in its frequency distribution.
- 6. An apparatus as claimed in claim 1 further comprising a decoupling means comprising a third radiation source means emitting a third radiation of a frequency selected to excite nuclear spin transitions.
- 7. An apparatus as claimed in claim 6 further comprising means for adjusting timing, duration, frequency, intensity and frequency band widths of radiations emitted by at least one of the first radiation source means, the second radiation source means and the third radiation source means.
- 8. An apparatus as claimed in claim 1 wherein the substantially uniform magnetic field generated by said primary magnet means has a strength of from 0.05 to about 20 milliTesla.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8714615 |
Jun 1987 |
GBX |
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8714804 |
Jun 1987 |
GBX |
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Parent Case Info
This application is a division of application Ser. No. 07/295,031 filed as PCT/GB88/00479 on Jun. 22, 1988, now U.S. Pat. No. 4,984,573.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2220269 |
Jan 1990 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
295031 |
Dec 1988 |
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