摘要:
In a digital scintillation camera system, image data representing an radioisotope distribution is detected by a scintillation camera and is then digitized and converted to a video signal. The video signal is processed in a video imager to produce a diagnostic image on a film. A count-to-grey-level converter is arranged to convert a radiation count of diagnostic image data to a grey-level. A count-to-grey-level conversion table is accessed in the converter. The conversion table includes a correction component for obtaining the same count-density characteristics of a film as in a conventional analog scintillation camera system.
摘要:
The present invention provides a method for developing a human T cell-engrafted mouse, which includes transplanting a human-derived bone tissue into an inbred line mouse deficient in immune cells, and a human T cell-engrafted mouse obtainable by the method. The present invention also provides a method for preparing an HIV-infected mouse model, which includes infecting the human T cell-engrafted mouse with HIV, and an HIV-infected mouse model obtainable by the method.
摘要:
An emission computed tomography apparatus comprises a patient couch on which a subject on the dosage of rodioisotope (RI) lies and a two-dimensional position detector for collecting radioisotope distribution data in the subject at various rotation positions while rotating around the subject and the patient couch in order to obtain a tomogram image of the RI distribution in the subject. In order to eliminate a false image (artifact) on the tomogram image resulting form unequal detection characteristics in the position detector, the patient couch is traveled in one direction of the coordinate systems every time the position detector is rotated by a given angle. One position signal from the position detector is corrected in response to the traveling length of the patient couch. An artifact-free tomogram image of the RI distribution is obtained on the basis of the corrected position signal and another position signal from the position detector.