摘要:
A gamma camera system is provided for obtaining a distribution image (i.e. a reconstruction and/or multiplanar reconstruction image) of a radioisotope injected into an object by dynamic study on the basis of .gamma.-rays emitted from the radioisotope. The system comprises a two-dimensional detector for detecting the .gamma.-rays, the detector being repeatedly rotated around the object. There are provided an element for forming image data of a reference image and the distribution image on the basis of detected signals from the detector, an element for obtaining a change in quantity of the .gamma.-rays every one rotation of detector, an element for specifying one of the plurality of rotations, the specified rotation corresponding to a maximum number of the .gamma.-rays, and an element for displaying the reference image using the reference image data corresponding to the specified one rotation. Further provided is an element for manually setting information required to obtain the distribution image using the displayed reference image. Using manually set information, the image data forming element creates the distribution image data.
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:
A scintillation camera apparatus adapted for displaying an image representing a radioisotope distribution within a subject under examination at a substantially constant level in image density during a persistent data acquisition procedure comprises an auxiliary memory for sequentially storing position signals representing detected positions of gamma rays, and an image memory for storing a count representing the frequency of detection of gamma rays in a memory location accessed by position signals. The auxiliary memory has a predetermined capacity, and thus, when the number of the sequentially stored position signals exceeds this memory capacity, the earliest-entered position signals stored therein are made to overflow therefrom. A memory controller accesses a location in the image memory by means of the overflowed position signals and decrements the content at the accessed location. After position signals are made to overflow from the auxiliary memory, the quantity of data stored in the image memory (the total number of counts of gamma rays) remains always at a constant value equal to the capacity of the auxiliary memory.
摘要:
A computer-implemented method and apparatus is provided for workflow configuration and execution in medical imaging. One method embodiment comprises the steps of creating and storing a workflow template (the workflow template comprising a standard form for entering data and activities), filling out the workflow template with data and a sequence of activities, and executing the sequence of activities according to the workflow template.