Academic Research And Simulation Of Noninvasive Monitoring Tissue Temperature By Using Ultrasound

Ultrasound has been widely used at low intensities for diagnostic and imaging applications. Many therapeutic procedures using ultrasound have been developed and clinically used with varying degrees of success. They are similar in that They all use the fact that ultrasound beams can be easily controlled, focused, and are completely noninvasive. Despite these advantages and the great potential that ultrasound has as a therapeutic agent, its use in the clinic is still limited.The main reason for this is that hardly any progress has been made in the design and practical implementation of treatment feedback and control procedures. The purpose of the paper is to simulate a noninvasive technique of auto梞onitoring tissue temperature changes due to heating fields by using diagnostic ultrasound for the use in clinic. There are three important points in our study. First, set up the received signal mathematical amodel on computer. Sencond, analyze the received signal data, in other words, take the temperature information from the data. In our study, we adopt two analytic method of spectrum. Third, use computer program to simulate the ultrasound echo system.We aim at two ends:to calculate temperature resolution and spatial temperature resolution. A ultrasound echo system is used in our study. This system include a ultrasound diagnostic instrument,a digital oscilloscope, and a computer. The working frequency of the ultrasound diagnostic instrument is 2.5MHz.The supreme sampling frequency of the digital is 200M1-lz.We use Matlab5.2 and VC++5.O to simulate the ultrasoupd echo system and analyze the received sinai data. The simulated results and the experiment indicate that:The simulation of spectrum estimation technique has a temperature resolution on the order 0. FC and the spatial temperature resolution on the order of 2. 0mm.