資源描述:
《CT灌注在腮腺病變中的診斷價(jià)值》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、上海交通大學(xué)碩士學(xué)位論文CT灌注在腮腺病變中的診斷價(jià)值姓名:石慧敏申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):口腔臨床醫(yī)學(xué)(口腔放射)指導(dǎo)教師:蔡以理;余強(qiáng)20070407結(jié)論CT灌注中不同的病變采樣方法能導(dǎo)致不同的評(píng)價(jià)結(jié)果。采樣方法I適用于增強(qiáng)不明顯或增強(qiáng)均勻的病變;方法II和III適宜于對(duì)增強(qiáng)明顯不均勻的病灶進(jìn)一步分析。CT灌注對(duì)腮腺良性腫瘤和惡性腫瘤的鑒別具有一定價(jià)值。關(guān)鍵詞腮腺,頭頸部腫塊,CT,灌注,采樣方法DIAGNOSTICVALUEOFCTPERFUSIONFORPAROTIDGLANDTUMORSABSTRACTOBJECTIVETostudytheperfusionof
2、softtissueneoplasmsintheneckregionandinparotids,comparethedifferencesinsamplingmethodsandthevalueindifferentiatingbenigntumorsfrommalignantonesintheparotids.MATERIALSANDMETHODS78casetumorsintheneckregionswereexaminedbyCTperfusion.Thesamplingmethodsweredividedintothreetypes?MethodI:thesiz
3、eofROI,placedonthelesion,covered90?100%oftheareaofthelesion.MethodII:theROIplacedontheenhancedregionofthelesion(>20HU).Methodill:theROIplacedontheunchangedregionofthelesion.53caseparotidglandtumorswereexaminedbyCTperfusion.TheparametersincludingBF>BV、MTTandPSwereevaluated.Wilcoxonsignsum
4、testwereused?RESULTSThereweresignificantdifferencesintheparametersofCTperfusion(BF>BVandPS)betweenmethodIandIILIIandIII(PvO.Ol).ExceptforMTT,thedifferencesofBF>BVandPSbetweenthebenignandmalignanttumorswerestatisticallysignificant(P<0.01).CONCLUSIONSDifferentsamplingmethodsresultindiffere
5、ntoutcomesofCTperfusion.ThesamplingmethodImaybemoreusefultoevaluatetheevenlyenhancedlesionsorlesionswithoutenhancement.ThesamplingmethodsIIandIIIcanbeutilizedtoelaborateandanalyzethelesionswithunevenenhancement.TheparametersofCTperfusion,BF>BVandPS,werevaluableindifferentiatingbenignandm
6、alignanttumorsoftheparotidgland?KEYWORDSparotidglandtumor,headandneckneoplasm,CT,perfusion,samplingmethod縮略語(yǔ)表縮寫英文全稱中文全稱TDCtime-densitycurve時(shí)間一密度曲線BFbloodflow血流量BVbloodvolume血容量MTTmeantransittime對(duì)比劑的平均通過時(shí)間PScapillarypermeabilitysurfaceareaproduct表面通透圖TTPtimetopeak對(duì)比劑峰值時(shí)間IRFimpulseresiduef
7、unctionR(t)剩余函數(shù)ROIregionofinterest感興趣區(qū)OBForganbloodflow器官血流MVDmicrovesseldensity微血管密度上海交通大學(xué)學(xué)位論文原創(chuàng)性聲明本人鄭重聲明:所呈交的學(xué)位論文,是本人在導(dǎo)師的指導(dǎo)下,獨(dú)立進(jìn)行研究工作所取得的成果。除文中已經(jīng)注明引用的內(nèi)容外,本論文不包含任何其他個(gè)人或集體已經(jīng)發(fā)表或撰寫過的作品成果。對(duì)本文的研究做出重要貢獻(xiàn)的個(gè)人和集體,均已在文中以明確方式標(biāo)明。本人完全意識(shí)到本聲明的法律結(jié)果由本人承擔(dān)。學(xué)位論文作者簽名:石慧敏日期:2007年04月07日上海交通大學(xué)學(xué)位