Abstract: An integrated Positron Emission Tomography (PET)/Computed Tomography (CT) system includes a patient support device supporting a patient pallet, a gantry having a space through which the patient pallet passes, a plurality of integrated PET/CT detector modules attached to one side of the gantry, an x-ray tube attached to the other side of the gantry, and a signal detecting/processing unit. Each of the plurality of integrated PET/CT detector modules include a plurality of PET detectors, a flat-panel x-ray detector disposed in contact with the PET detectors and a read-out driver mounted at a rear end of the PET detectors and electrically connected with the flat-panel x-ray detector.

Abstract: Disclosed is a thyroid uptake measurement apparatus, in which a radiation attenuation filter is detachably provided at the leading end of a collimator of a radiation detector. The radiation attenuation filter inhibits the saturation of signals when gamma rays exceeding the maximum counting rate are entered. Accordingly, it is possible to inhibit the distortion of signals when the pile-up of the signals increases by an increase in the radiation decay. Moreover, the use of the radiation attenuation filter can significantly improve the scatter fraction, that is, the ratio of scattered radiation/total radiation generated by material scatter of radiation.

Abstract: Disclosed is a thyroid uptake measurement apparatus, in which a radiation attenuation filter is detachably provided at the leading end of a collimator of a radiation detector. The radiation attenuation filter inhibits the saturation of signals when gamma rays exceeding the maximum counting rate are entered. Accordingly, it is possible to inhibit the distortion of signals when the pile-up of the signals increases by an increase in the radiation decay. Moreover, the use of the radiation attenuation filter can significantly improve the scatter fraction, that is, the ratio of scattered radiation/total radiation generated by material scatter of radiation.

Abstract: The present invention provides an integrated PET/CT system that can simultaneously or sequentially take PET pictures and CT pictures, in which an integrated PET detector module is formed by packaging a plurality of PET (Positron Emission Tomography) detectors in a can or a cartridge, an integrated PET/CT detector module is formed by mounting a front end of a flat-panel x-ray detector at the PET detector, and the PET/CT detecting modules are mounted to a gantry. The integral PET/CT detecting module that is the most important component of the present invention can take CT pictures by mounting a flat-panel x-ray detector (or DR (Digital Radiograph)-detector) at the front end of a common PET detector, and the flat-panel x-ray detector can minimize attenuation and scatter of gamma rays, such that it is possible to minimize interference due to the x-ray detector in acquiring a PET picture.

Abstract: Disclosed is a versatile single photon emission computerized tomograph capable of imaging a number of areas of the patient by the same system to obtain diagnostic nuclear medical images of excellent resolution and sensitivity, and imaging method using the same. The versatile single photon emission computerized tomograph includes a support means configured in a plate structure so that the patient can lie down and adapted to move in longitudinal and vertical directions while the patient is lying down; a gantry configured in an arc shape about an object to be imaged; a body for retaining and supporting an outer surface of the gantry while being able to slide and rotate; and at least one detector mounted so as to slide along the inner surface of the gantry and adapted to protract toward or retract from the center point of the gantry to image an organ of the patient.