Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal

An automatic brightness and stable signal technology, applied in X-ray equipment, electrical components, etc., can solve the problems of slow sampling speed, automatic brightness stabilization signal tracking speed and low image brightness stability, so as to achieve convenient and flexible installation and use, and improve tracking Speed ​​and image brightness stability, easy installation and fixed effects

Inactive Publication Date: 2004-11-03
SHENYANG NEUSOFT MEDICAL SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a slow sampling speed, and the tracking speed of the automatic

Method used

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  • Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal
  • Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal
  • Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal

Examples

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Example

[0016] Example 1. Select a filter set consisting of three filters, two filters with apertures (2a), (2b) and one filter without aperture (2c), press figure 2 Arrangement order combination, the filter group after combination is as figure 2 As shown, it is assembled on the fixing part on the front of the photomultiplier tube. The apertures of the selected filters (2a) and (2b) are 3.0mm and 2.3mm respectively, and the thickness of the filter is 0.2mm. The three filters are all gel-neutral filters, and the attenuation rates are all taken 40%;

[0017] When using two filters, remove the filter (2c), the material, pore size and attenuation rate of the filters (2a) and (2b) remain unchanged, and the filter is still in the gel with an attenuation rate of 40% Sex filter.

Example

[0018] Example 2. A piece of glass sheet metal nickel-chromium-iron alloy coated neutral filter is selected and assembled on the fixing member in front of the photodiode. The attenuation rate of the above-mentioned coated filter gradually decreases from the center of the filter to the edge of the filter, the attenuation rate at the center is 100%, and the attenuation rate at the edge is 40%. The thickness of the thickest part of the filter coating should not exceed 1.5mm±0.1mm.

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Abstract

This invention relates to an optical central sample device for getting automatic brightness stable signals in an image conversion device of a x-line unit including a sample lens and a photomultiplier tube or a photodiode characterizing in mounting a kind of light filter in front of the optical sampling device replacing the known diaphragm in which, the light filter may be a set composed of two filters with different central apertures or a neutral one of a glass filmed with NiCrFe alloy and the filming of which becomes thicker steadily from the center to the edge. The phenomena will not happen if uses this invented method that the switch beam limiter or a transmitted load density becomes larger suddenly or an image brightness picture changes suddenly which realizes automatic brightness stable signal quick tracing.

Description

Technical field [0001] The invention relates to a medical device, in particular to an optical center-focused sampling device for obtaining automatic brightness stabilization signals in an image conversion device in an X-ray machine. Background technique [0002] The structure of the X-ray machine mainly includes: image intensifier, image conversion device, high-voltage generator, X-ray tube and console. Automatic brightness stabilization is an essential function of X-ray machines, but also a very demanding function. In order to keep the brightness output by the image intensifier within a certain range, automatic brightness control and automatic exposure control are required. The effect of automatic brightness stabilization is to keep the image displayed on the monitor at a basically stable brightness when the doctor observes different parts of the subject, which is beneficial to the doctor's observation and diagnosis. To achieve this goal, the image to be collected and the...

Claims

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Application Information

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IPC IPC(8): H05G1/36H05G1/64
Inventor 江宏刘柏
Owner SHENYANG NEUSOFT MEDICAL SYST CO LTD
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