本文選題：超聲內(nèi)鏡 + 相控陣��； 參考：《天津大學》2014年碩士論文

【摘要】：醫(yī)學超聲內(nèi)鏡將微型超聲探頭置于電子內(nèi)鏡前端,既能通過電子內(nèi)鏡觀察到消化道組織表面的形態(tài),也能通過超聲掃描觀察到組織的內(nèi)部斷層信息,提高了消化道病變的確診率。具有無損傷、無輻射、診斷效果好和重復(fù)性高等優(yōu)點,應(yīng)用前景廣闊。相控陣超聲內(nèi)鏡相對于傳統(tǒng)的機械環(huán)掃超聲內(nèi)鏡,具有成像質(zhì)量高,探頭使用壽命長,可引導(dǎo)穿刺手術(shù)等優(yōu)點,因此本文在課題組機械環(huán)掃超聲內(nèi)鏡成像系統(tǒng)研究的基礎(chǔ)上,設(shè)計了醫(yī)學相控陣超聲內(nèi)鏡成像系統(tǒng)方案,完成多路超聲回波的串行模擬接收系統(tǒng)和基于FPGA的數(shù)字處理系統(tǒng)。本文的主要工作有:1.制定相控陣超聲內(nèi)鏡接收與處理系統(tǒng)方案。模擬接收系統(tǒng)串行接收16路超聲回波信號,以FPGA為核心的數(shù)字處理系統(tǒng)將16路信號進行數(shù)字波束合成,再經(jīng)數(shù)字信號處理后通過USB2.0接口上傳到計算機,實時顯示超聲掃描圖像。2.設(shè)計模擬接收電路。實現(xiàn)超聲回波信號的模擬接收與處理,包括限幅、選通、濾波和放大等功能。3.研究數(shù)字波束合成技術(shù),設(shè)計高延時精度的動態(tài)逐點聚焦高性能數(shù)字波束合成器,以提高相控陣超聲成像質(zhì)量。4.設(shè)計基于FPGA的數(shù)字處理程序。實現(xiàn)數(shù)字波束合成、正交解調(diào)、數(shù)字濾波、對數(shù)壓縮和坐標變換等數(shù)字信號處理及USB2.0數(shù)據(jù)傳輸控制,完成計算機實時顯示應(yīng)用程序設(shè)計。5.搭建相控陣超聲內(nèi)鏡實驗系統(tǒng),進行接收回波實驗和掃描成像實驗,驗證模擬接收電路與數(shù)字處理系統(tǒng)的有效性和正確性。
[Abstract]:Medical ultrasound endoscopes place miniature ultrasound probes on the front end of electronic endoscopes, which can not only observe the shape of the digestive tract tissue surface through the electronic endoscopy, but also observe the information of the internal sections of the tissue through ultrasound scanning. The diagnosis rate of digestive tract diseases was improved. It has the advantages of no damage, no radiation, good diagnostic effect and high repeatability. Compared with the traditional mechanical loop scan ultrasound endoscopy, phased array ultrasound endoscopy has the advantages of high imaging quality, long service life of the probe, and can guide puncture surgery. Therefore, this paper is based on the research of mechanical loop scan ultrasound endoscopic imaging system in our research group. A medical phased array ultrasonic endoscopic imaging system is designed to complete the serial analog receiving system of multi-channel ultrasonic echo and the digital processing system based on FPGA. The main work of this paper is: 1. To establish a phased array endoscopic receiving and processing system. The analog receiving system receives 16 ultrasonic echo signals serially, and the digital processing system based on FPGA synthesizes the 16 channels signals by digital beam synthesis, then uploads them to the computer through USB2.0 interface after digital signal processing, and displays the ultrasonic scanning image .2. in real time. The analog receiving circuit is designed. To realize the analog receiving and processing of ultrasonic echo signal, including limiting, gating, filtering and amplifying functions. In order to improve the ultrasonic imaging quality of phased array, the digital beam synthesizer with high delay precision and dynamic point-by-point focusing and high performance digital beam synthesizer is studied. Design a digital processing program based on FPGA. Digital signal processing, such as digital beam synthesis, quadrature demodulation, digital filtering, logarithmic compression and coordinate transformation, and USB2.0 data transmission control are realized. A phased array ultrasonic endoscope experiment system was built to verify the validity and correctness of analog receiving circuit and digital processing system.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：R445.1

【參考文獻】

相關(guān)期刊論文 前7條

1 王平;高陽;范文政;王林泓;何為;許琴;;一種基于相對聲程差的高精度逐點聚焦實現(xiàn)方法[J];聲學學報;2012年05期

2 齊雁;譚冠政;范必雙;;基于FPGA的醫(yī)學超聲成像數(shù)字波束合成器設(shè)計[J];計算機測量與控制;2010年04期

3 陳曉冬;李明;俞鋒;李偉鋒;郁道銀;;超聲內(nèi)窺數(shù)字成像技術(shù)[J];中國激光;2009年10期

4 張曉輝;張凱;邱文靜;;超聲診斷儀中數(shù)字波束形成的設(shè)計[J];現(xiàn)代生物醫(yī)學進展;2009年01期

5 Tumur Tsendsuren;;Usefulness of endoscopic ultrasonography in preoperative TNM staging of gastric cancer[J];World Journal of Gastroenterology;2006年01期

6 馬家辰;沈毅;蘇寶庫;;超聲聲束形成技術(shù)的對比分析[J];中國醫(yī)療器械雜志;2005年06期

7 何正權(quán),劉志宏,袁勤;數(shù)字多聲束形成技術(shù)的研究及其意義[J];中國超聲醫(yī)學雜志;1997年08期

相關(guān)博士學位論文 前1條

1 鮑曉宇;相控陣超聲檢測系統(tǒng)及其關(guān)鍵技術(shù)的研究[D];清華大學;2003年

相關(guān)碩士學位論文 前5條

1 李亞楠;超聲內(nèi)鏡數(shù)字成像系統(tǒng)[D];天津大學;2014年

2 趙強;醫(yī)學超聲內(nèi)鏡編碼激勵與信號調(diào)理系統(tǒng)的研究[D];天津大學;2014年

3 郝云霞;基于FPGA的醫(yī)用陣列超聲內(nèi)鏡成像系統(tǒng)的研究[D];天津大學;2013年

4 蔡榮東;高集成度超聲相控陣檢測系統(tǒng)相關(guān)技術(shù)的研究[D];天津大學;2009年

5 辛雅寧;一種新型超聲電源換能系統(tǒng)的研究設(shè)計[D];西北工業(yè)大學;2005年

，

本文編號：2003458