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EP0107294A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus

Assignee: Toshiba Corp
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Filing: 1983-08-26
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Granted: —
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Expires: 2003-08-26
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Abstract

Abstract Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus to display as an image the distribution of the spin density or relaxation time of specified atomic nuclei existing in an object utilizing nuclear magnetic resonance phenomena including a phase demodulator for phase demodulating a nuclear magnetic resonance signal evoked by nuclear magnetic resonance phenomena in accordance with two reference waves whose phases are different from one another by 90°, an analog-to-digital converter for digitalizing the separated two signals obtained by the phase demodulator, and a phase correction processor for automatically correcting the phase difference between the reference waves and nuclear magnetic resonance signal to produce a frequency spectrum by processing the digitalized signals.

Inventors

  • 👤 Hidetomo C/O Patent Division Takase

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 03:15
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/36; G01R33/3621; G01R33/44; G01R33/48; G01R33/54

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 118 words
Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus to display as an image the distribution of the spin density or relaxation time of specified atomic nuclei existing in an object utilizing nuclear magnetic resonance phenomena, the reception signal processing apparatus comprising: means for phase demodulating a nuclear magnetic resonance signal evoked by nuclear magnetic resonance phenomena in accordance with two reference waves the phases of which are different from one another by 90°; means for digitalizing the separated two signals obtained by said phase demodulating means; and phase correction processing means for automatically correcting the phase difference between the reference waves and nuclear magnetic resonance signal for producing a frequency spectrum by processing said digitalized signals.
Claim 2
Dependent Claim 118 words
Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus to display as an image the distribution of the spin density or relaxation time of specified atomic nuclei existing in an object utilizing nuclear magnetic resonance phenomena, the reception signal processing apparatus comprising: means for phase demodulating a nuclear magnetic resonance signal evoked by nuclear magnetic resonance phenomena in accordance with two reference waves the phases of which are different from one another by 90°; means for digitalizing the separated two signals obtained by said phase demodulating means; and phase correction processing means for automatically correcting the phase difference between the reference waves and nuclear magnetic resonance signal for producing a frequency spectrum by processing said digitalized signals.
Claim 3
Dependent Claim 41 words
The reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus of claim 1 wherein said- phase correction processing means is a digital operation apparatus which performs phase correction procedure on said digitalized demodulation signals and then Fourier transforms said signals.
Claim 4
Dependent Claim 41 words
The reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus of claim 1 wherein said phase correction processing means is a digital operation apparatus which Fourier transforms said digitalized demodulation signals and then performs phase correction on the transformed signals.

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