X-ray CT equipment and its processing method
A processing method and ray technology, applied in X-ray equipment, image data processing, instruments, etc., can solve problems such as less time spent and poor image quality
Inactive Publication Date: 2003-07-16
GE MEDICAL SYST GLOBAL TECH CO LLC
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[0007] However, since the segmentation data reconstruction process (Segemnt Recon) which is a processing method in the live display mode uses only a small amount of projection data for reconstruction, the image quality it obtains is poor, although the reconstructed X of the first frame - Ray tomograms take less time, and moreover, problems involving "tangential artifacts" (specific to segmented data reconstruction processing (SegemntRecon)) and artifacts depending on the angle of the detector tube
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[0031]
[0032] attached image 3 Shown is a system configuration diagram of an X-ray CT apparatus embodying the first mode of the present invention.
[0033] as attached image 3 As shown, the X-ray CT apparatus consists of a gantry device 320 that irradiates an object (patient) with X-rays and detects the X-rays that have penetrated the placed object, an operating table 300, and a carrier 340. The gantry device 320 sends instruction signals to complete different settings, reconstructs the tomogram based on the projection data from the gantry device 320 and displays the reconstructed data, the carrier 340 mounts the subject and transports him or her to the gantry inside of the device.
[0034] The stand apparatus indicated by 320 has a configuration including a main controller 322 for controlling the entire apparatus.
[0035] Reference numeral 321 denotes an interface (I / F) for communicating with the console 300, and 322 denotes a gantry rotating unit in which an X-ray tu...
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With the object of improving image quality while keeping short the time taken to reconstruct the first X-ray tomogram at the time of start of scanning in its real-time display mode, an X-ray CT apparatus having a rotary unit for causing an X-ray source and an X-ray detector for detecting X-rays from the X-ray source to rotate integrally around a subject, is provided with a full data reconstructing device for reconstructing tomograms on the basis of penetrating X-ray data of each view detected during a full turn around the subject, a segment data reconstructing device for reconstructing tomograms on the basis of penetrating X-ray data of each view detected during a turn by (180+alpha) degrees, and a change-over device for counting the tomograms reconstructed after the start of scanning, and changing over between the full data reconstructing device and segment data reconstructing device according to the count.
Description
Background technique [0001] The present invention relates to an X-ray CT (Computed Tomography) apparatus for obtaining an X-ray tomogram of an object by X-ray radiation. [0002] An X-ray CT apparatus irradiates an object (patient) with X-rays to detect a difference in X-ray absorption rates in various tissues (such as internal organs, blood, and gray matter) of a human body through an X-ray detector, and uses a computer The detected differences are processed to obtain (reconstruct) images (tomograms) of sections (planes of the corresponding slices, ie slices) of the imaged region. [0003] In addition to the normal display mode used in usual X-ray CT tomography, X-ray CT equipment has the function of real-time display mode (Smart View) available in the reconstruction of X-ray tomography, depending on the purpose of use One or the other of the two modes can be used selectively. [0004] The real-time display mode is used to observe, for example, when a doctor is suturing a p...
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IPC IPC(8): A61B6/03G06T11/00
CPCY10S378/901G06T11/005A61B6/032
Inventor 志田浩一河内直幸
Owner GE MEDICAL SYST GLOBAL TECH CO LLC