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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, ensuring exposure accuracy, and improving imaging quality.

Active Publication Date: 2021-01-05
SUZHOU POWERSITE ELECTRIC CO LTD
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  • 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

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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 invention relates to the technical field of ray tubes, in particular to a mixed focus control method and device. The mixed focus control method comprises the steps of: acquiring exposure parameters and a preset tube current; when the exposure parameters are greater than the maximum exposure parameters corresponding to a small focus and less than a preset multiple of the maximum exposure parameters corresponding to a large focus, determining to adopt the large focus and the small focus for simultaneous exposure; dividing the preset tube current into a first preset tube current correspondingto the small focus and a second preset tube current corresponding to the large focus according to a preset proportion; and according to the first preset tube current and the second preset tube current, adjusting filament currents corresponding to the small focus and the large focus to realize automatic exposure. The large focus and the small focus are adopted for exposure at the same time, on thebasis 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 according to the preset proportion, and the problem that the ray tube loses efficacy in advance due to the unilateral reason of the small focus is solved.

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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IPC IPC(8): H04N5/228H04N5/232H04N5/235
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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