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Measuring system and method of time modulation transfer function

A transfer function, time modulation technology, applied in the field of medical devices, to achieve the effect of high degree of automation, improved repeatability, and improved accuracy

Inactive Publication Date: 2017-05-31
BEIJING WEIMAI MEDICAL EQUIP CO LTD
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Problems solved by technology

[0006] The present invention intends to propose a measurement system and method for the time modulation transfer function of the X-ray interventional imaging system to solve some basic problems of the performance test of the interventional imaging system, and it is expected to realize the measurement of the time modulation transfer function of the X-ray interventional imaging system Accurate measurement

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  • Measuring system and method of time modulation transfer function

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Embodiment Construction

[0032] The specific embodiments of the present invention will be described in more detail below with reference to the drawings and examples, so as to better understand the solution of the present invention and its advantages in various aspects. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention.

[0033] like figure 1 As shown, on the one hand, the embodiment of the present invention provides a system for measuring time modulation transfer function, which includes a motion platform 101 , a test target 102 , a driving device 103 , an anti-shaking device 104 and a synchronization device 105 .

[0034] A C-arm angiography system is taken as the system under test, which includes an X-ray tube 201 and a flat panel detector 202 .

[0035] The test target 102 has a knife-edge edge, which means that the test target 102 has sharp edges. The test target 102 is installed on the moving platf...

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Abstract

The invention discloses a measuring system and method of a time modulation transfer function. The measuring system comprises a motion platform, a test target, a driving device, and a synchronizing device, the test target comprises a blade-shaped edge, the test target can be movably arranged on the motion platform, the driving device is connected with the test target and used for dragging the test target to move on the motion platform at a uniform speed, and the synchronizing device is connected with the driving device and used for maintaining synchronization of the motion of the test target and the exposure of a detected system. According to the measuring system and method of the time modulation transfer function, the time modulation transfer function of a medical X-ray interventional imaging system can be accurately measured, and comprehensive assessment of the X-ray imaging system is facilitated.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a measurement system and method for a time modulation transfer function of an X-ray interventional imaging system. Background technique [0002] The modulation transfer function (MTF) is a description of the spatial frequency transmission characteristics of a linear imaging system or its links, and is used to evaluate the ability of various imaging systems or imaging components to transfer image information and detail resolution. [0003] At present, the general methods for measuring MTF include slit camera and edge method. The edge method has been specified by the International Electrotechnical Commission (IEC) as a standard method for measuring system MTF. The system MTF obtained by the slit method is very accurate, easy to operate, and the method is mature, but its processing is very difficult. The slit width needs to be less than or equal to 10 microns, and the er...

Claims

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Application Information

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IPC IPC(8): G01M99/00
CPCG01M99/005
Inventor 俞龙江解菁张宁
Owner BEIJING WEIMAI MEDICAL EQUIP CO LTD
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