乳腺磁共振成像史浩

《乳腺磁共振成像史浩》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、7/1/202111:32:34AM1乳腺磁共振成像MRIOFBREAST史浩山东省医学影像学研究所7/1/202111:32:34AM2PREFACE7/1/202111:32:34AM3MAMMOGRAPHY7/1/202111:32:34AM4PITFALLSThesensitivityisbetween69%and90%.Thespecificityrangesfrom10%to40%.Tumoursmaybemissedbecauseofpoormammographictechniqueorobservererror,orthesizeandnatureofthelesions

2、relativetothesurroundingbreasttissue,whichmayobscurethem.7/1/202111:32:34AM5ULTRASOUND7/1/202111:32:34AM6PITFALLSUShaslimitationsasascreeningmodalitybecausemicrocalcificationinductalcarcinomainsitumaynotbeidentified.Thefalsenegativerateisrangingfrom0.3%to47%insomeseries.Itisdifficulttoensurethatt

3、heentirebreasthasbeenimaged.USistimeconsuming.7/1/202111:32:34AM7MRI7/1/202111:32:34AM8ADVANTAGESExcellentsofttissueresolutionTomographicimagingMultipleorientationsHighspatialresolutionLackofionizingradiationGradingthecancerofbreast7/1/202111:32:34AM9DISADVANTAGESLowersensitivitytocalcificationEx

4、pensiveExaminationfeeLongerexaminationtimeInfectionofheartmovementandrespiration7/1/202111:32:34AM10EXAMINATIONINDEX钼靶或超声不能确诊的病灶区分术后疤痕和肿瘤复发要保留乳腺的乳腺癌患者，查找其它隐藏肿瘤，明确肿瘤范围，确定手术区域评价隆胸术后硅树胶植体的完整性及乳腺病变情况7/1/202111:32:34AM11MRITECHNIQUE7/1/202111:32:34AM12COILSdedicatedbreastcoilsingleordoublebreastmode7/

5、1/202111:32:34AM13EXAMINATIONTIMEAftermenopauseNotimerequestBeforemenopauseSixthtoSixteendaysofthemenstrualcycleOravoidingsixdaysbeforeandaftermenses7/1/202111:32:34AM14POSITIONThepronepositionwilldecreasetheamountofrespiratorymotionartifact.Minimalcompressionappliedwithinthecoilwilldecreasemotio

6、nartifact.7/1/202111:32:34AM15PHASE-ENCODINGDIRECTIONThephaseencodingdirectionshouldnotpassanteriortoposterior,butfromlefttoright,toensurethatcardiacactivityisnotprojectedoverthebreast.7/1/202111:32:34AM16SATURATION&GATINGSaturationzoneislocatedbehindthoracicwallCardiacandrespiratorygating7/1/202

7、111:32:34AM17SCANNINGPLANESTransverseplaneCoronalplaneSagittalplane7/1/202111:32:34AM18CONVENTIONALSEQUENCEST1WIT2WISTIR(Fatsuppressionsequences)7/1/202111:32:34AM19SPECIALSEQUENCES3DFLASH(fastlowangleshot)PWI(Perfusio