PROBLEM TO BE SOLVED: To provide a detection method that can easily detect kudoa septempunctata.;SOLUTION: A detection method is configured to: irradiate a sample put in a static magnetic field of 4.7 Tesla to 10 Tesla with an electromagnetic wave; and detect whether kudoa septempunctata is present in the sample depending upon presence or absence of reception of a nuclear magnetic resonance signal based on radiation of the electromagnetic wave larger by 1.2±0.3 ppm than a chemical shift of a resonance frequency of proton. Further, the detection method causes a linear inclination magnetic field to be overlapped on the static magnetic field, and when receiving the nuclear magnetic field resonance signal, can detect a distribution of the kudoa septempunctata in the sample thanks to the nuclear magnetic field resonance image based on the reception of the signal.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT
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