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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 brightness stabilization signal and the image brightness stability are very low.

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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Effect test

example 1

[0016] Example 1. Select a filter group consisting of three filters, two filters with apertures (2a), (2b) and one filter without aperture (2c), press figure 2 Combination in sequence, after combination, the filter group is as follows figure 2 As shown, fits on the mount in front of the photomultiplier tube. The above-mentioned selected filters (2a) and (2b) have apertures of 3.0mm and 2.3mm respectively, and the thickness of the filters is 0.2mm. The three filters are all gel neutral filters, and the attenuation rates are taken as 40%;

[0017] When using two optical filters, remove the optical filter (2c), the material, aperture and attenuation rate of the optical filters (2a) and (2b) remain unchanged, and the optical filter still uses the gel medium with an attenuation rate of 40%. sex filter.

example 2

[0018] Example 2. Select a neutral filter plated by a piece of glass sheet metal nickel-chromium-iron alloy, and assemble it on the fixing piece in front of the photodiode. The attenuation rate of the above-mentioned coated optical filter gradually decreases from the center of the optical filter to the edge of the optical 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 shall 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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