脈衝式超音波激振式磁性感測技術之可行性探討

Abstract

脈衝式超音波激振式磁性感測技術其架構建立於聲波式振動樣品磁量儀，圓形海爾貝克磁鐵陣列(circular Halbach array)作為主要磁場來源，利用音波管及聚焦式超音波管產生能量，使被極化的磁性材料在接收線圈中振盪，產生磁通量變化讓接收線圈產生電信號以達到造影技術之雛形。在磁場相同的情況下，先以振盪頻率20～20kHz之音波做為驗證基礎，進而使用振盪頻率為3MHz之超音波來看是否實驗結果會與音波之結果相符。脈衝式超音波激振式磁性感測技術之可行性探討其目標是未來在臨床上能以超音波結構性影像為基礎，結合磁性感測之功能性影像，同時看到器官或組織的結構及病灶的位置。Pulsed ultrasound-induced magnetic sensing technology is based on sound-exciting vibrating sample magnetometer. Circular Halbach array as the main source of magnetic field. Using a sonic probe and a focused ultrasonic probe to generate energy, causing the polarized magnetic material to vibrate in the receiving coil, and the magnetic flux change causes the receiving coil to generate an electrical signal to achieve the prototype of the contrast technique. In the case of the same magnetic field, the acoustic wave with an oscillation frequency of 20 to 20 kHz is used as the basis for verification, and then the ultrasonic wave with an oscillation frequency of 3 MHz is used to see whether the experimental result matches the result of the sound wave. The Feasibility of Pulsed Ultrasound-Induced Magnetic Sensing Technology is aimed at the future clinically based on ultrasound structural images, combined with functional images of magnetic sensing, while seeing the structure of organs or tissues and location of the lesion.