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Body laser positioning system and method used for computed tomography (CT) system

A laser positioning, laser technology used in patient positioning for diagnosis, radiation beam guides, computed tomography scanners, etc. to achieve a reduction in scanning and repositioning

Active Publication Date: 2013-06-05
GE MEDICAL SYST GLOBAL TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems mentioned above, the present invention provides a volume laser positioning system and method for CT systems to assist doctors to better position patients

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  • Body laser positioning system and method used for computed tomography (CT) system
  • Body laser positioning system and method used for computed tomography (CT) system
  • Body laser positioning system and method used for computed tomography (CT) system

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Embodiment Construction

[0044] In order to solve the above-mentioned problems, the present invention adopts a lens system to generate a volumetric laser positioning beam, so that the laser distribution is at least tangent to the circumference of the SFOV of the CT in the CT scan x-y plane, and can also be generated in the z direction to be tangent to the CT rotation axis. The axial X-ray imaging width is the same as the laser body distribution.

[0045] The present invention will be described below by taking a cylindrical lens system as an example. It should be noted that the present invention is not limited to the cylindrical lens system, and other appropriate lens systems can be selected as required.

[0046] The basic principles of cylindrical lens system design are first described. Figure 4 Shown is the principle of the cylindrical lens to adjust the laser distribution. exist Figure 4 , the meanings of the symbols are as follows:

[0047] r 0 : incident laser radius,

[0048] -f: cylindri...

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Abstract

The invention relates to a body laser positioning system and a method used for a computed tomography (CT) system. The body laser positioning system used for the CT system comprises a laser positioning device and a laser piece generation device, wherein the laser positioning device is used for emitting lasers to an object to be scanned and using the emitted lasers to carry out initialization positioning for CT scanning, the laser piece generation device is used for enabling the emitted lasers to be diffused to laser pieces in a CT scanning plane, and edges of the laser pieces along the direction of propagation are at least tangential to a circumference of scanning field of view (SFOV) of the CT system. The body laser positioning method used for the CT system comprises that the lasers are emitted to the object to be scanned, and the emitted lasers are utilized to carry out the initialization positioning for the CT scanning, the emitted lasers are diffused to the laser pieces in the CT scanning plane, and the edges of the laser pieces along the direction of propagation are at least tangential to the circumference of the SFOV of the CT system.

Description

technical field [0001] The present invention relates to computed tomography (CT) systems, and more particularly to volume laser positioning systems and methods for CT systems. Background technique [0002] Various CT procedures, especially imaging for radiotherapy planning procedures, interventional procedures and procedures for obese patients require precise positioning of specific human tissues in the scan field of view (SFOV). Accurate and fast patient positioning is necessary for successful exposures and saves time in these procedures and also avoids redundant exposures. [0003] The usual CT procedure is as follows: [0004] Step 1: Before the CT scan, the doctor uses the laser positioning light to initialize the scan. Laser positioning lights are used to aid in patient positioning and alignment in three planes, including the axial, coronal, and sagittal planes. ( figure 1 ) [0005] Step 2: Use the X-ray positioning film to perform 0-degree positioning scan and 90...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03A61B6/08A61B6/04
Inventor 王颖李硕董加勤
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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