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Mixed focus control method and device

A control method and focus technology, applied in the field of ray tubes, can solve problems such as tube failure, and achieve the effects of preventing premature failure, using frequency balance, and improving imaging quality

Active Publication Date: 2021-08-13
SUZHOU POWERSITE ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a hybrid focus control method and device to solve the problem of premature tube failure caused by the frequent use of small focus in the prior art

Method used

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0056] According to an embodiment of the present invention, an embodiment of a hybrid focus control method is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, although A logical order is shown in the flowcharts, but...

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Abstract

The present invention relates to the technical field of ray tubes, in particular to a hybrid focus control method and device. The method includes acquiring exposure parameters and preset tube current; when the exposure parameter is greater than the maximum exposure parameter corresponding to the small focus and less than the maximum exposure When the preset multiple of the maximum exposure parameter is used, it is determined to use large and small focal points for simultaneous exposure; the preset tube current is divided into the first preset tube current corresponding to the small focus and the second preset tube current corresponding to the large focus according to the preset ratio ; According to the first preset tube current and the second preset tube current, adjust the filament current corresponding to the small focus and the large focus to realize automatic exposure. Simultaneous exposure with large and small focal points and on the basis of the preset tube current, the preset tube current is divided into the first preset tube current and the second preset tube current corresponding to the small focus and the large focus by using a preset ratio, which prevents The problem of premature failure of the ray tube due to the unilateral reason of the small focus.

Description

technical field [0001] The invention relates to the technical field of ray tubes, in particular to a hybrid focus control method and device. Background technique [0002] The ray tube (also known as the ball tube) is the key component of the ray machine, which is composed of the cathode filament and the anode target surface. Ray tubes are classified according to the number of filaments, and can be divided into single-filament tubes, double-filament tubes and triple-filament tubes. Each filament corresponds to a focus, so it can be divided into single focus tube, double focus tube and triple focus tube. Among them, trifocal tubes are mainly used for digital angiography (ie, DSA), and single-focus and bifocal tubes are most used in practice. Under the same conditions, the smaller the effective focal point, the better the image quality, but the smaller the input power allowed by the anode of the tube, it is suitable for shooting small objects or thin parts (such as limbs) and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/228H04N5/232H04N5/235H04N23/40
CPCH04N23/41H04N23/67H04N23/72H04N23/73
Inventor 范声芳陈飞王万全陈晓森王彦为
Owner SUZHOU POWERSITE ELECTRIC CO LTD
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