Tomogram creating device, tomogram creating method, and radiation examining apparatus

A tomogram creating method, comprising the following steps:

• a first structural tomogram creating step for creating data about a first structural tomogram, based on a first radiation detect signal detected in an unbreathed state of a body to be examined, with respect to radiation transmitted through the body;
• a second structural tomogram creating step for creating data about a second structural tomogram, based on a second radiation detect signal detected in a breathed state of the body with respect to radiation transmitted through the body;
• a correction information creating step for creating correction information of a tomogram, based on the first structural tomogram data and the second structural tomogram data;
• and
• a functional tomogram creating step for creating data about a functional tomogram, based on a third radiation detect signal detected in the breathed state of the body with respect to radiation emitted from the body due to a radioactive medical agent, and the correction information.

A radiation examining apparatus, comprising:

• a radiation source device for emitting radiation;
• a plurality of radiation detectors for respectively outputting both a first radiation detect signal corresponding to a detected signal of the radiation transmitted through a body to be examined, and a second radiation detect signal corresponding to a detected signal of radiation emitted from the body due to a radioactive medical agent;
• and
• a tomogram creating device;
• said tomogram creating device including,
• means for creating data about a first structural tomogram, based on a third radiation detect signal detected in an unbreathed state of a body to be examined, with respect to radiation transmitted through the body;
• means for creating data about a second structural tomogram, based on the first radiation detect signal detected by the corresponding radiation detector in a breathed state of the body;
• means for creating correction information of a tomogram, based on the first structural tomogram data and the second structural tomogram data;
• and
• functional tomogram creating means for creating data about a functional tomogram, based on the second radiation detect signal detected by the radiation detector in the breathed state of the body, and the correction information.

A radiation examining apparatus, comprising:

• an examined-body holding device having a bed movable in a longitudinal direction thereof with a body to be examined being laid thereon;
• an imaging device including,
• a radiation detector ring body surrounding a region in which the bed is inserted and including a plurality of radiation detectors, an X-ray source for irradiating the body with X rays, and an X-ray source moving device for shifting the X-ray source in a circumferential direction of the radiation detector ring body;
• said radiation detectors for respectively outputting both a first radiation detect signal corresponding to a detected signal of the X rays transmitted through the body, and a second radiation detect signal corresponding to a detected signal of ? rays emitted from the body;
• and
• a tomogram creating device for creating data about a first structural tomogram, based on a third radiation detect signal detected in an unbreathed state of the body with respect to radiation transmitted through the body, creating data about a second structural tomogram, based on the first radiation detect signal detected by the corresponding radiation detector in a breathed state of the body, creating correction information about a tomogram, based on the first structural tomogram data and the second structural tomogram data, and creating data about a functional tomogram, based on the second radiation detect signal detected by the radiation detector in the breathed state of the body, and the correction information.