US 12,405,324 B2
Measurement apparatus and measurement method
Satoru Nebuya, Tokyo (JP)
Assigned to ASAHI INTECC CO., LTD., Seto (JP)
Filed by ASAHI INTECC CO., LTD., Seto (JP)
Filed on May 5, 2023, as Appl. No. 18/143,939.
Application 18/143,939 is a continuation of application No. PCT/JP2020/042112, filed on Nov. 11, 2020.
Prior Publication US 2023/0305084 A1, Sep. 28, 2023
Int. Cl. G01R 33/24 (2006.01); A61B 5/0536 (2021.01); A61B 5/055 (2006.01); G01R 33/44 (2006.01); G01R 33/54 (2006.01)
CPC G01R 33/24 (2013.01) [A61B 5/0536 (2013.01); A61B 5/055 (2013.01); G01R 33/443 (2013.01); G01R 33/543 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A measurement apparatus comprising:
a static magnetic field applying part that applies a static magnetic field having a constant magnitude in a first direction to a measurement target;
a plurality of current applying parts that apply a plurality of AC currents oriented in a plurality of directions toward a portion of the measurement target, via a pair of electrodes;
a magnetic field detecting element that detects a magnitude of a magnetic field of an electromagnetic wave generated due to nuclear magnetic resonance in the portion of the measurement target generated in response to (i) the static magnetic field having the constant magnitude in the first direction and (ii) the plurality of AC currents;
a calculating part that calculates impedance of the portion of the measurement target based on a detection result of the magnetic field detecting element; and
an internal information output part that generates information including an internal component of the measurement target, based on the calculated impedance, wherein
the current applying parts apply the plurality of AC currents to a first portion and a second portion of the measurement target;
the calculating part calculates a first impedance based on a detection result of a magnetic field generated from the first portion of the measurement target according to the plurality of AC currents, and a second impedance based on a detection result of a magnetic field generated from the second portion of the measurement target according to the plurality of AC currents; and
the internal information output part generates information including at least one component of the first portion and the second portion, by comparing the calculated first impedance and the calculated second impedance.