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EP0165057A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Magnetic resonance apparatus

Assignee: Toshiba Corp
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Filing: 1985-06-12
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Granted: —
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Expires: 2005-06-12
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Abstract

Abstract A magnetic resonance apparatus is described for gener- afrng a magnetic resonance phenomenon in an object by applying gradient, and static magnetic field, and rotating magnetic field based upon a standard transmission signal, and demodulating the evoked magnetic resonance signal using a standard reception signal. The standard signal generator has an oscillator (11) for producing a signal of desired frequency. Memory (17A, 17B) stores data corresponding to a signal of desired frequency, and counters (16A, 16B) form read out speed controlling means for controlling the speed at which the data stored in the memory (11) is read out. The counters are incremented in accordance with desired frequency SG f . The counters include reading out initiation timing control means for controlling the start time of the reading out of the data stored in the memory (11). The standard signal is formed by changing the output signal from the oscillator (11) in accordance with the output signal from the memory (11), in circuits (19A, 19B).

Inventors

  • 👤 Masaaki C/O Patent Division Hino

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 15:49
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/36; G01R33/3607

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 167 words
A magnetic resonance apparatus for generating a magnetic resonance phenomenon in an object by applying gradient and static magnetic field and a rotating magnetic field based upon a transmisson standard signal to evoke a magnetic resonance phenomenon, and detecting and demodulating the magnetic resonance signals with a reception standard signal, the apparatus comprising: oscillator means (11) for producing a signal of a desired frequency, memory means (17) for storing data corresponding to a signal of desired frequency, read out speed controlling means (14, 15, 16) for controlling the speed at which the data stored in the memory means -f17) is read out in accordance with the desired frequency, reading out initiation timing control means (14, 15, 16) for controlling the initiation timing of the reading out of the data stored in the memory means (17), and means (19) for producing at least one of the standard signals by changing the output signal from the oscillating means in accordance with the output signal from said memory means (17).
Claim 2
Dependent Claim 167 words
A magnetic resonance apparatus for generating a magnetic resonance phenomenon in an object by applying gradient and static magnetic field and a rotating magnetic field based upon a transmisson standard signal to evoke a magnetic resonance phenomenon, and detecting and demodulating the magnetic resonance signals with a reception standard signal, the apparatus comprising: oscillator means (11) for producing a signal of a desired frequency, memory means (17) for storing data corresponding to a signal of desired frequency, read out speed controlling means (14, 15, 16) for controlling the speed at which the data stored in the memory means -f17) is read out in accordance with the desired frequency, reading out initiation timing control means (14, 15, 16) for controlling the initiation timing of the reading out of the data stored in the memory means (17), and means (19) for producing at least one of the standard signals by changing the output signal from the oscillating means in accordance with the output signal from said memory means (17).
Claim 3
Dependent Claim 29 words
A magnetic resonance apparatus as claimed in claim 1, wherein one of the standard signal issued from said standard signal producing means is utilised as said transmission standard signal.
Claim 4
Dependent Claim 29 words
A magnetic resonance apparatus as claimed in claim 1, therein one of the standard signals issued from said standard signal producing means is utilised as said reception standard signal.
Claim 5
Dependent Claim 38 words
A magnetic resonance apparatus as claimed in claim 1, wherein one of the standard signals issued from said standard signal producing means is utilised as said transmission standard signal, and another is utilised as said reception standard signal.
Claim 6
Dependent Claim 24 words
5 . A magnetic resonance apparatus as claimed in claims 1 to 4, wherein said read out initiation timing control means includes counter (16).
Claim 7
Dependent Claim 15 words
A magnetic resonance apparatus as claimed in claim 5, wherein the counters have preloading functions.

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