Energy imaging with generally constant energy separation

一种成像、能量的技术，应用在成像系统领域，能够解决影响有效重构扫描图像、调制管电流不理想波形等问题

一种成像、能量的技术，应用在成像系统领域，能够解决影响有效重构扫描图像、调制管电流不理想波形等问题

CN107110796AActive Publication Date: 2017-08-29GENERAL ELECTRIC CO
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  • Energy imaging with generally constant energy separation
  • Energy imaging with generally constant energy separation
  • Energy imaging with generally constant energy separation

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Experimental program
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Embodiment Construction

[0022] now refer to figure 1 , an exemplary computed tomography (CT) imaging system 10 is shown including a gantry 12 that may represent a "third generation" CT scanner. The gantry 12 includes an X-ray source 14 that projects a polychromatic beam of X-rays 16 towards a detector assembly 18 on the opposite side of the gantry 12 . Typically, a collimator may be an integral part of the detector assembly 18 . Such as figure 2 As shown, the detector assembly 18 may be formed from a plurality of detectors 20 and a data acquisition system (DAS) 32 . A plurality of detectors 20 sense projected X-rays passing through a patient 22 or object, and a DAS 32 converts the corresponding data into digital signals for subsequent processing. Each detector 20 generates an analog electrical signal representative of the intensity of the incident X-ray beam, and thus the intensity of the beam attenuated through the patient 22 . During a scan to acquire X-ray projection data, the gantry 12 and ...

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Abstract

The present inventors have recognized that fall times between high-kV to low-kV levels (during a dual energy or fast-kV energy scan) are linked to the discharge of HV (high voltage) capacitance. In an embodiment of the invention, a high voltage generator may be activated during fall transitions from first to second energy levels in order to substantially maintain a predetermined fall transition time. Accordingly, substantially equal energy distributions between high-kV and low-kV levels may be achieved.

Description

[0001] Cross References to Related Applications [0002] This international patent application filed under the Patent Cooperation Treaty (PCT) claims priority to U.S. Application No. 14 / 658,913, filed March 16, 2015, and U.S. Application No. 62 / 098,001, filed December 30, 2014, They are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates generally to imaging systems, and more particularly to high voltage generators for imaging systems. Background technique [0004] Computed tomography (CT) is an x-ray medical imaging procedure that enables the use of multiple two-dimensional (2D) images acquired around a patient or subject to obtain a three-dimensional (3D) image of the patient or subject. In CT, the use of dual energy imaging is known to obtain material signatures and / or reduce artifacts by utilizing two scans of a patient or subject at different voltage / energy levels ("low kV" and "high kV") . [0005] During a sin...

Claims

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Application Information

Patent Timeline
29 Aug 2017
Publication
CN107110796A
IPC
G01N23/04; H05G1/58
CPC
G01N23/046; H05G1/58; A61B6/032; A61B6/482; H03K17/00; H05G1/10
Inventors
J-F.拉鲁瓦; J.布劳亚