Method for measuring pulmonary circulation time

Abstract

The invention discloses a method for measuring pulmonary circulation time, comprising the following steps of: (1) making chest scout view CT scan and chest conventional CT scan on a testee; according to an obtained chest scanning image, selecting an image the scanning part of which is closest to the heart, showing pulmonary artery and pulmonary vein simultaneously; determining the bed surface position of the image as the scanning position of measuring the pulmonary circulation time of the testee; (2) injecting a contrast agent with a certain concentration into the vein of the testee by a high-pressure injector, and making CT perfusion scan on the scanning position determined by the step 1; (3) after the scan is finished, selecting two images of the contrast agent appearing first in the pulmonary artery and appearing first in the pulmonary vein from obtained images; and calculating the time interval of the two images by scanning time points recorded on each image. The method overcomes the defects of the past art on precision in the aspect of measuring pulmonary circulation time, and meanwhile, the method is simple and feasible and is convenient to operate.

Description

technical field [0001] The invention belongs to a method for establishing a "pulmonary circulation time" database, in particular to a method for measuring the "pulmonary circulation time" by measuring the "pulmonary circulation time", thereby establishing a database. Background technique [0002] The venous blood ejected from the right ventricle enters the pulmonary artery, passes through the various branches of the pulmonary artery in the lung, and flows to the capillary network around the alveoli, where gas exchange occurs, turning the venous blood into oxygen-rich arterial blood, which passes through the lungs The pulmonary veins at all levels belong to branches, and then inject into the left atrium through the pulmonary veins. The circulation of blood along the above path is called pulmonary circulation or small circulation. [0003] The main function of the pulmonary circulation is gas exchange, which is crucial to maintaining the normal physiological metabolism of the...

AI Technical Summary

Problems solved by technology

The traditional blood circulation time data collection method is to estimate the period from the injection of a specific drug to the subject’s perception of the drug’s effect as the cycle time. This method has limited measurement accuracy and large errors, and the obtained data loses comparison significance. Unable to provide valuable data for medical research

If the current relatively common ultrasound angiography technology is introduced, although high-precision observation can be achieved, due to the characteristics of the echo of the ultrasound interface, effective contrast imaging of the lungs cannot be performed.