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1、医学影像1（Medicalimaging1）ImagingdiagnosisofdigestivesystemThefirstsectionofdigestivetractimagingexaminationmethodBariumsulfateexaminationofdigestivetractItisdividedintotwokindsoftraditionalanddoublecontrast,whichisthepreferredmethodofinspectionUltrasonographyandCTexaminationTh
2、einternalcondition,invasionandmetastasisofthetumorwereobservedMRIexaminationIthascharacteristics,butitisseldomusedindiagnosisTraditionalradiographyconceptThecontrastagentisintroduced?Organs,thefilling,resultinginupliftonthescreenorthefilm(fillingdefect)ordepression(prominen
3、tniche)silhouetteimagecast,whichcanbecalled"cast"or"silhouettestylecheck".Traditionalradiography-Method(1)characteristicsofbariumsulfate(BaSO4)Concentration:esophagus220%W/V;stomach130%W/Vsmallintestineandcolon50%W/VViscosity:1000cPa.SSuspensionheightTheparticlesaresmalland
4、uniform,andthesizeisabout1mm(two)inspectionmethodObservationoffourphases:filling,compressionSimpledoublecontrast,mucosalphaseThree.InspectionsiteEsophagus:mucosa,fillingphaseStomach,duodenum:mucosaphase,fillingphase,compressionphase,simpledoublecontrastphaseSmallintestine:f
5、illingphaseandmucousmembranephaseColon:fillingphase,mucosaphase,compressionphaseDoublecontrastradiographyconceptWhentheorganisinflatedbygas,itformsnegativebackgroundontheX-ray.Asmallamountofhighqualityandhighconcentrationbariumcandelineatetheshapeofthecysticorgan,whichisals
6、ocalled"panoramic"examinationDoublecontrastradiographymethod(1)BaSO4features:A:highcontent;B:C:uniformparticles;goodviscosity,goodfluidity,10-15cPa.S;D:suspensionstability;acidresistance;E:F:160%W/V:theconcentrationoftheesophagus,stomachintestinecolon60-65%W/V50-60%W/V;(2)h
7、ypotonicdrugs:654-2moreuse(3)gasproductionmethod:gasinjectionfoamingagentinhalationDoublecontrastradiographymethodDoublecontrastradiographyoftheesophagus,bariumandgaswereswallowedtogetherThestomach?A,lowB,aZhang;oralbariumaftergasinjection,observationofgastricmucosa;C,lefta
8、nteriororthostaticbarium200-300ml,observationoftheesophagusandgastriccardia;D,supi
