US 7,627,082 B2 · Radiological imaging apparatus

Abstract

A radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radically with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a γ-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a γ-ray image pickup signal is output). The use of accurate information about γ-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the tomogram accuracy, that is, the PET examination accuracy.

Claims11

Dependent claims

A radiological imaging apparatus comprising:

a bed for laying a subject thereon;
an image pickup device, comprising:
a plurality of radiation detectors for detecting a plurality of radiations from said subject, wherein one certain radiation passed through a first radiation detector of said radiation detectors is detected by a second radiation detector of said radiation detectors;
and
an X-ray source for moving around said subject and irradiating X-rays to said subject,
wherein said first and second radiation detectors are arranged in a plurality of layers in a direction away from said bed around said bed, wherein said first radiation detector which is the first layer from a bed side outputs a first detection signal of an X-ray passed through said subject, said X-ray being one of said certain radiation and a second detection signal of a γ-ray emitted from said subject, said γ-ray being another of said certain radiation;
and
a signal processing apparatus connected to said plurality of radiation detectors, for processing radiation detection signals detected by said radiation detectors.

5 more elements

Dependencies are inferred from the claim text.

Radiological imaging apparatus

Life of this patent

Radiological imaging apparatus

Life of this patent

Abstract

Claims11