JPS648959A - Nuclear magnetic resonance tomographic imaging apparatus - Google Patents

Nuclear magnetic resonance tomographic imaging apparatus

Info

Publication number
JPS648959A
JPS648959A JP62163222A JP16322287A JPS648959A JP S648959 A JPS648959 A JP S648959A JP 62163222 A JP62163222 A JP 62163222A JP 16322287 A JP16322287 A JP 16322287A JP S648959 A JPS648959 A JP S648959A
Authority
JP
Japan
Prior art keywords
gradient
magnetic field
sampling
signal
ripple
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.)
Pending
Application number
JP62163222A
Other languages
Japanese (ja)
Inventor
Yuji Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Healthcare Japan Corp
Original Assignee
Yokogawa Medical Systems Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yokogawa Medical Systems Ltd filed Critical Yokogawa Medical Systems Ltd
Priority to JP62163222A priority Critical patent/JPS648959A/en
Publication of JPS648959A publication Critical patent/JPS648959A/en
Pending legal-status Critical Current

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  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

PURPOSE:To reduce the blur of an image, by measuring the gradient area of a data sampling section to calculate the average value of intervals and generating a sampling signal of timing becoming equal to the average gradient area corresponding to the change of ripple to control the sampling of an AD converter. CONSTITUTION:When an object to be examined is received in a static magnetic field coil 11 and a current is allowed to flow to the static magnetic field coil 11 to apply a magnetic field, a gradient coil 12 forms a magnetic field by the current from a gradient power source 14 to supply a gradient magnetic field. The output signal of a preamplifier 19 is demodulated by a demodulator 20 and the unnecessary high frequency component thereof is removed by a low-band filter 21 and the signal from the filter 21 is converted to a digital signal by an AD converter 22. The sampling signal at this time is outputted from the controller 23 receiving the output signal of a ripple monitor 24 detecting the ripple superposed on the gradient power source 14. The controller 23 integrates the gradient waveform monitored by the ripple monitor 24 at the time of scanning and calculates a sampling interval becoming equal to a average gradient area and outputs a sampling trigger signal to the AD converter 22 in the timing thereof.
JP62163222A 1987-06-30 1987-06-30 Nuclear magnetic resonance tomographic imaging apparatus Pending JPS648959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62163222A JPS648959A (en) 1987-06-30 1987-06-30 Nuclear magnetic resonance tomographic imaging apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62163222A JPS648959A (en) 1987-06-30 1987-06-30 Nuclear magnetic resonance tomographic imaging apparatus

Publications (1)

Publication Number Publication Date
JPS648959A true JPS648959A (en) 1989-01-12

Family

ID=15769636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62163222A Pending JPS648959A (en) 1987-06-30 1987-06-30 Nuclear magnetic resonance tomographic imaging apparatus

Country Status (1)

Country Link
JP (1) JPS648959A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5256432A (en) * 1990-11-13 1993-10-26 Pizza Hut, Inc. Method of making pizza with a pizza toppings disk
JP2007003458A (en) * 2005-06-27 2007-01-11 Jeol Ltd Digital orthogonal lock-in detecting method and device
CN101949868A (en) * 2010-09-16 2011-01-19 厦门大学 Data acquisition device of nuclear magnetic resonance spectrometer
JP2012016574A (en) * 2010-06-07 2012-01-26 Toshiba Corp Magnetic resonance imaging apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185148A (en) * 1984-03-02 1985-09-20 Shimadzu Corp Nmr imaging appratus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185148A (en) * 1984-03-02 1985-09-20 Shimadzu Corp Nmr imaging appratus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5256432A (en) * 1990-11-13 1993-10-26 Pizza Hut, Inc. Method of making pizza with a pizza toppings disk
JP2007003458A (en) * 2005-06-27 2007-01-11 Jeol Ltd Digital orthogonal lock-in detecting method and device
JP2012016574A (en) * 2010-06-07 2012-01-26 Toshiba Corp Magnetic resonance imaging apparatus
CN101949868A (en) * 2010-09-16 2011-01-19 厦门大学 Data acquisition device of nuclear magnetic resonance spectrometer

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