Technology Research On Phased Array Ultrasonic Probe For Intervention Ablation Catheter Positioning

In recent years,ultrasonic technology has been improved,and has been widely used in many fields,such as medical imaging,industrial detection and so on,with the rapid development of information technology and electronic technology.In many applications of ultrasound,ultrasonic phased array can control the beam deflection and focus by adjusting the time of phased array probe.Because the ultrasonic phased array through the array of elements can be ordered to achieve flexible deflection and focusing beam,it is faster and more sensitive compared with the traditional ultrasonic testing.Therefore,phased array ultrasound is a mainstream research direction in recent years.At present,phased array ultrasound is mainly used for ultrasonic phased array ultrasonic imaging in medicine.However,the image is not particularly desirable because of the technical limitations.The doctors must rely on their experience to detect the ultrasonic image during the operation,which reduces the accuracy of diagnosis in virtually.This paper mainly studies on the technology of ultrasonic phased array probe used for the location of the intervention ablation.It can help to achieve precise location in the ablation catheter organ by matching the closed contours of the organ got by ultrasonic phased array probe with three-dimensional vector model of organs established before the operation.Therefore,the focus of this paper is how to obtain the contour information of the of the organ to determine the location of the interventional catheter ablation with high accuracy and short reaction time.This paper mainly studies the following aspects:1,The paper firstly studies on the application status in the field of medical ultrasound,especially in interventional ablation surgery,and has a further study on the related theory of ultrasonic testing and ultrasonic probe technology,the structure and composition of the ultrasonic probe system.2,In the paper,we studied the related problems of interventional ablation,mainly studied the structure and composition of the interventional ablation catheter,and the difficulties and research trends in the interventional ablation.3,The related principles of ultrasonic phased array are studied,such as the theory of ultrasonic and acoustic field model,the principle of sound field radiation,the deflection and focusing principle of ultrasonic phased array.The key of dynamic focusing is to determine the delay value of array excitation.4,The transducer array is designed,mainly for the two-dimensional rectangular array field model pulse space impulse response is divided into model and calculation of acoustic radiation and scattering model based on two-dimensional matrix ultrasonic probe parameter calculation and performance analysis.5.The simulation experiment is carried on with the help of the Field_II to verify the focusing characteristics of ultrasonic probe.