Method and computed tomography device and data storage medium for performing a dynamic ct examination on a patient

Abstract

The invention relates to a method and computed tomography device(11) and data storage medium for performing a dynamic CT examination on a patient(P). The computed tomography device(11) comprises a machine frame (12)including a static part (13) and a rotation part(14) around a system axis (15), and a patient support plate(21) capable of moving in the direction of the system axis(15). The rotation part is provided with a x-ray source(16) and a radiation detector(17), which are opposite to each other. The x-ray source(16) is provided with a diaphragm (30), which is provided with diaphragm elements (31,32), which can be moved in the direction of the system axis(15), and can be used to limit a X-ray bund (18) emitted from the x-ray source(16) in the direction of the system axis(15). In the method, the patient support plate(21) can be moved in the direction of the system axis(15) between the first and the second terminal positions (E1PL,E2PL),and the diaphragm elements (31,32) of the diaphragm (30) can be moved in the direction of the system axis(15) between the first and the second terminal positions (E1PL,E2PL). The invention also relates to a data carriage (25), and is provided with a computer program (26) used to realize the method.

Description

technical field [0001] The invention relates to a method for a computed tomography system with a gantry and a patient movable in the direction of the system axis and to a computed tomography system for dynamic CT examinations of patients A support plate, the frame has a stationary part and a part rotatable about a system axis, on which an X-ray source and an X-ray detector are arranged facing each other. Furthermore, the invention relates to a data carrier having a computer program for carrying out the method. Background technique [0002] In addition to conventional CT examinations (in which slice images or three-dimensional images of the patient's body region are reconstructed) in order to obtain information about the patient's morphology, so-called dynamic CT examinations of patients have been established, with which it is possible to obtain For example functional information about patient tissue. Contrast agents are usually used here in computed tomography. [0003] A...

AI Technical Summary

Problems solved by technology

A disadvantage of this recording technique is that the body region that can be examined is limited to the width of the x-ray detector, viewed in the direction of the system axis or the patient's longitudinal axis, which cannot be easily extended, at least in existing computed tomography systems.

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