Apparatus and Method for Processing Reception Signal in Magnetic Resonance Measurement Apparatus

摘要

In a magnetic resonance measurement apparatus such as an NMR measurement apparatus, when a frequency of an observation nucleus falls within a high frequency band, an RF reception signal is converted into an intermediate frequency signal, and is input to an analog-to-digital converter. In this case, under-sampling is executed for the intermediate frequency signal in the analog-to-digital converter, and a second-order aliased signal component generated from a target signal component is observed. On the other hand, when the frequency of the observation nucleus falls within a low frequency band, over-sampling for the RF reception signal is executed.

主权项

1. A magnetic resonance measurement apparatus comprising:
an analog-to-digital converter circuit to which an analog reception signal including a target signal component having a first frequency is input, that samples the analog reception signal at a sampling frequency which is a second frequency, and that outputs a digital reception signal; and a signal processor circuit that executes a signal processing on the digital reception signal, wherein when the first frequency satisfies an over-sampling condition, a sampling scheme of the analog-to-digital converter circuit is an over-sampling scheme, and the signal processor circuit executes the signal processing on the target signal component, and when the first frequency satisfies an under-sampling condition, the sampling scheme of the analog-to-digital converter circuit is an under-sampling scheme, and the signal processor circuit executes the signal processing on an aliased signal component generated from the target signal component.