System and method for single-exposure digital subtraction angiography imaging

Abstract

The invention discloses a system and method for single-exposure digital subtraction angiography (DSA) imaging. The system is composed of an x-ray generator, a multi-energy photon counting detector, a DSA image generation unit, a device for image storage and display, a sickbed, a rotary rack and a controller, wherein the x-ray generator can generate continuous energy spectrum x rays; the multi-energy photon counting detector detects x photons which penetrate a human body and can judge and count energy of the x photons respectively; the DSA image generation unit collects output signals of the multi-energy photon counting detector to form data of two transmission images of a high energy zone and a low energy zone; and DSA images are obtained through subtraction computation of the data, and a conventional x-ray image can be obtained through summary computation. The DSA image can be obtained by the system through single exposure, so motion artifacts can be avoided; the contrast medium dosage and the radiation agent dosage can be reduced; equipment efficiency can be increased; more effective approaches can be provided for DSA imaging of dynamic objects; and the system has important values in clinical application.

Description

[0001] Technical field: [0002] The present invention relates to a medical X-ray imaging system and method, specifically to a single-exposure digital subtraction angiography (DSA) imaging system and method, providing an effective means of low-dose imaging for the diagnosis and treatment of vascular lesions. [0003] Background technique: [0004] Cardiovascular disease is one of the leading causes of death worldwide, and obtaining accurate images of cardiovascular patients is of great significance for diagnosis and treatment. Angiographic imaging (DSA) is a large-scale real-time imaging diagnostic equipment, especially in coronary angiographic diagnosis, etc. It is an essential equipment, and it is also a platform for interventional therapy. It is mainly used for coronary stent implantation, minimally invasive valve implantation, interventional therapy for tumors, interventional therapy for cerebrovascular malformations and aneurysms, interventional therapy for uterine fibroid...

AI Technical Summary

Problems solved by technology

Its disadvantage is that due to the voluntary or involuntary movement of the patient during the photography process, the mask image and the angiographic image cannot be accurately matched, resulting in poor registration artifacts or blurring of the image.

In dual-energy imaging, two different tube voltages are used for imaging, the equipment is complicated, and there are differences and overlaps in the energy spectrum, which reduces the quality of the subtraction image

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