《医学影像学 Medical Imaging》课程教学课件（PPT讲稿，儿科，2020）消化系统示教课——肝胆系统

Medical Imaging(Liver, Biliary System, Pancreasand Spleen)

Medical Imaging （Liver, Biliary System, Pancreas and Spleen）

-Method of examination>Ultrasound:convenience,fast, nonradiative>CT: Major imaging techniques, enhancement scan,Highradiationdose>MRI: nonradiative, enhancement scan, MRCP,time-consuming>X-ray: DSA

◼Method of examination ➢Ultrasound：convenience，fast，nonradiative ➢CT：Major imaging techniques，enhancement scan， High radiation dose ➢MRI：nonradiative，enhancement scan，MRCP， time-consuming ➢X-ray ：DSA

Nomal CT manifestations(axial view>Changing shapes of liver on different slices.>Homogeneous attenuation of hepatic parenchyma; slightlyhigherthanthatof spleen（脾脏）>Hepaticblood vessels appear as markedly enhanced punctiformor branched linear structures after cantrast enhancement,whereasintrahepatic bileducts（胆管）often can notbe shown.>Two scanplanesof note:at theIst hepatichilus &the 2sthepatichilus

◼Nomal CT manifestations(axial view) ➢Changing shapes of liver on different slices. ➢Homogeneous attenuation of hepatic parenchyma；slightly higher than that of spleen（脾脏）. ➢Hepatic blood vessels appear as markedly enhanced punctiform or branched linear structures after cantrast enhancement,whereas intrahepatic bile ducts（胆管） often can not be shown. ➢Two scan planes of note：at the 1st hepatic hilus & the 2st hepatic hilus

-Liver-CT plain scans (axial view33.50毫1/1scanAbdomen(PED)KV

◼Liver-CT plain scans (axial view)

Liver-CT enhancement scan (axial view)6.09.00DU/1Abdomen(PED)OkV

◼Liver-CT enhancement scan (axial view)

Liver-CT enhancement scan (axial view)-167.0

◼Liver-CT enhancement scan (axial view)

-CTA导出的SYSTE[H]ACq

◼CTA

Density changes of hepatic parenchyma2689592013-419Se:2Im:2716:40:51AcqTime:16:42:06XY-9.25fuotPrescan6.1Abdomen(PED)120ky247mA512x512600msW:300WL:759mASTilt0.00CQCHILDRENHOSP2.5thk

◼Density changes of hepatic parenchyma

Liver-MR plain scans (axial view)T2WIT1WI

◼Liver-MR plain scans (axial view) T1WI T2WI

■MRCP（磁共振胆胰管水成像

◼MRCP(磁共振胆胰管水成像)