Method for generating CT angiography based on plain-scan CT

Abstract

The invention discloses a method for generating CT angiography based on plain-scan CT. The method comprises the following steps: acquiring a plain-scan CT image and a CTA image corresponding to a layer; constructing a deep learning model for generating a CTA image from the plain-scan CT image; and a loss function of the deep learning model is defined, a back propagation and gradient descent algorithm is adopted, a model parameter enabling the loss function to be minimum is searched, and the trained deep learning model is obtained. According to the method, the defects of current CTA contrast agent injection can be overcome, anaphylactic reaction or renal toxicity possibly caused by contrast agent injection is avoided, the cost and difficulty of CTA are greatly reduced, and the method is suitable for various medical scenes and has very high clinical application value.

Description

technical field [0001] The invention belongs to the technical field of medical image processing, and in particular relates to a method for generating CT angiography based on plain scan CT. Background technique [0002] At present, the methods mainly used in clinical vascular imaging include digital silhouette angiography (Digital subtraction angiography, DSA), computed tomography angiography (Computed topography angiography, CTA), magnetic resonance angiography (Magnetic resonance angiography, MRA), and ultrasound vascular imaging. imaging etc. Among them, DSA is considered to be the gold standard for vascular imaging due to its high spatial resolution and real-time observation. However, this method is invasive and often not used as the preferred inspection method. CTA and MRA can image blood vessels in various parts of the body with minimal trauma, and are often used as the preferred examination methods. Ultrasound angiography can only image specific parts, and the imagin...

AI Technical Summary

Problems solved by technology

At present, CTA method is usually used clinically. However, due to the need for injection of contrast medium, there is a possibility of contrast medium allergy or related adverse events. At the same time, due to the nephrotoxicity of contrast medium, this examination cannot be performed for patients with impaired renal function. , In addition, the current CTA technology only utilizes the characteristic of increased blood vessel density after contrast agent injection, while human blood vessels themselves have specific location and morphological characteristics, such as the thoracoabdominal aorta running in front of the spine, which has fixed branches and running directions , none of these features are used in current CTA technology

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