| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image high in image quality by reducing bright spot artifacts generated at an image center due to influence of digital noise mixing into an analog/digital converter for detecting magnetic resonance signals and converting them to digital signals. SOLUTION: The magnetic resonance signals generated from a subject 1 are received by a reception coil 14b and amplified in amplifiers 15 and 16, and the amplified analog signals are converted to the digital signals in a reception system 6 including an analog/digital converter (ADC) 17. From the digital signals, the image of the subject is generated by an image processing part comprising a signal processing system 7 and a CPU 8. The reception system 6 includes a voltage adjusting mechanism 26 for adjusting the power supply voltage of the DC of the ADC 17, and the power supply voltage of the ADC 17 is adjusted to an optimum value and set by the voltage adjusting mechanism 26. The optimum value of the power supply voltage of the ADC 17 is such a voltage that a noise level when the magnetic resonance signal inputted to the ADC 17 is 0 is a background level or below. COPYRIGHT: (C)2011,JPO&INPIT
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