Low-dose CT image noise reduction method and device

Abstract

The invention discloses a low-dose CT image noise reduction method and device, and the method comprises the steps: collecting a plurality of CT matching image pairs, and constructing a training data set based on the collected CT matching image pairs; constructing a neural network model for performing noise reduction processing on the low-dose CT image to obtain a high-dose CT image; training a neural network model by using the training data set to obtain a CT image noise reduction model; and inputting a to-be-optimized low-dose CT image into the CT image noise reduction model to obtain a high-dose CT image after noise reduction processing. Therefore, according to the method and the device, the low-dose CT image can be subjected to noise reduction processing to obtain the high-dose CT image with relatively high quality, namely, the quality of the CT image can be ensured without increasing the radiation dose.

Description

technical field [0001] The invention relates to the field of CT image noise reduction, in particular to a low-dose CT image noise reduction method and device. Background technique [0002] CT (computerized tomography, computerized tomography) scan is a medical imaging technique used in radiology to obtain detailed images of the body in a non-invasive manner. The principle of a CT scanner is: use a rotating X-ray tube and a row of detectors placed in a gantry to measure the X-ray attenuation of different tissues in the body, and then use a reconstruction algorithm to process multiple X-rays taken from different angles on a computer Radiographic measurements to produce tomographic (cross-sectional) images of the body. [0003] Due to the rapid increase in the number of patients undergoing CT scans in recent years, the radiation effects received during CT scans have attracted widespread attention. High-dose CT scans have higher current and voltage and longer scan time; low-do...

AI Technical Summary

Problems solved by technology

Studies have shown that the high current, high voltage and long scanning time of high-dose CT lead to longer radiation exposure time of patients, resulting in higher radiation, which may lead to cancer, but high-dose CT images are clear and accurate; The radiation caused by low-dose CT is lower, but the image noise of low-dose CT is more

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