Multi-focal double-contrast tube and control method thereof
A multi-focus and contrast technology, applied in the field of medical imaging, can solve the problem of not having a multi-focus dual-contrast tube control method, and achieve the effect of high engineering practicability and promoting development.
Active Publication Date: 2018-08-28
麦默真空技术无锡有限公司
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[0005] If the additional micro-focus function can be realized on the basis of the large and small focus of the existing common light source CT tube, then the existing medical CT can use the large and small focus mode to perform normal absorption contrast imaging on the human body, retaining the current All clinical applications can also add micro-focus mode, which can perform phase-contrast imaging on the human body to achieve clear imaging of human soft tissues such as tumors. At present, there is no one that can achieve large, small, and large in the same tube through computer simulation. The function of micro focus, and there is no multi-focus double-contrast tube and its control method
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[0026] In order to better clearly express the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.
[0027] figure 1 It shows a specific embodiment of the present invention, a schematic diagram of the structural connection of a multi-focus double-contrast tube. Specifically, the present invention optimizes the structure of the magnetic focusing system by establishing a model of the multi-focus double-contrast tube , set the simulation parameters, and the three optical focus sizes that meet the requirements are respectively large focus 1.2×1.5mm 2 , small focus 0.37×0.23mm 2 , micro focus 37×21μm 2 , thus verifying the feasibility of the multi-focus double-contrast tube model. Those skilled in the art understand that the present invention refers to the X-ray source capable of realizing large, small, and micro-focus functions on a medical CT system as "multi-focus double-contrast tube...
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The invention provides a multi-focal double-contrast tube. The multi-focal double-contrast tube comprises a cathode emitter (1) and an anode target plate (2), which are oppositely arranged along the advancing direction of electron beams; two magnetic quadrupole lenses (3), which are same in shape and size and opposite in polarity, are arranged between the cathode emitter (1) and the anode target plate (2) in parallel along the advancing direction of the electron beams; the magnetic quadrupole lenses (3) are provided with multiple magnetic poles (31); furthermore, the magnetic poles of the twomagnetic quadrupole lenses (3) are oppositely arranged with each other; each magnetic pole (31) is wound with an exciting coil (32) used for generating a focusing magnetic field and capable of changing the Ampere turns; and the focal length of the two magnetic quadrupole lenses (3) is adjusted by changing the Ampere turns of the exciting coil (32). According to the multi-focal double-contrast tubeand a control method thereof provided by the invention, in the original size focal mode, in coordination with a micro-focal imaging algorithm, micro-focal phase-contrast imaging on a key small area is realized; development of CT clinical diagnosis is greatly promoted; and the engineering applicability is very high.
Description
technical field [0001] The invention relates to the field of medical imaging, in particular to a multi-focus double-contrast tube and a control method thereof. Background technique [0002] In the field of traditional absorption contrast CT medical imaging, since most human soft tissues, such as cancer cells, have little difference in the absorption of X-rays, the image contrast is very low and the imaging effect is poor. The X-ray phase contrast imaging technology has the ability to clearly image light elements and weakly absorbing substances, and can obtain higher image resolution. [0003] Since the first commercial X-ray tube came out in 1896, traditional X-ray imaging technology is based on the difference in the absorption of X-rays by different substances. At present, X-ray absorption contrast imaging technology is widely used in clinical CT imaging equipment. However, in the field of actual medical imaging, since most of human soft tissues, such as cancer cells, hav...
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CPCH01J35/14
Inventor叶华伟方奇
Owner麦默真空技术无锡有限公司