Imaging device and imaging method

An imaging method comprising:

• transmitting, by a plurality of transmitters each of which includes a transmission area, a wave from the transmission area of each of the plurality of transmitters to a measurement area;
• receiving, by a plurality of receivers each of which includes a reception area, a scattered wave of the wave from the measurement area, in the reception area of each of the plurality of receivers;
• and
• imaging an object in the measurement area using measurement data of the scattered wave, wherein
• each of the transmission area and the reception area has a finite size, and
• the imaging of the object in the measurement area includes:
• deriving, using the measurement data, a scattering field function that receives a transmission position of the wave and a reception position of the scattered wave as input and outputs an amount of the scattered wave at the reception position, the finite size being reflected in the scattering field function;
• deriving an imaging function that receives an imaging target position as input and outputs an image intensity at the imaging target position, and is defined based on an amount output from the scattering field function in response to inputting the imaging target position into the scattering field function as the transmission position and the reception position;
• and
• imaging the object in the measurement area using the imaging function.