liver,bile duct,pancreas and spleen
TRANSCRIPT
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肝、胆、胰、脾肝、胆、胰、脾LLiver, bile duct, pancreas and spleeniver, bile duct, pancreas and spleen
陈少琼(陈少琼( Chen,Shaoqiong)Chen,Shaoqiong)
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Technique and methodsTechnique and methods1.1. Liver angiographyLiver angiography
2.2. CT CT
3.3. MRI MRI
4. Contrast examination of the bile duct :: OOral cholecystographyral cholecystography
IIntravenous cholecystocholangiographyntravenous cholecystocholangiography
Direct cholangiographyDirect cholangiography
TT-tube Cholangiography-tube Cholangiography
PTCPTC --------Percutancous transhepatic cholangiography --------Percutancous transhepatic cholangiography
ERCPERCP ------Endoscopic retrograde cholangiopancreatography ------Endoscopic retrograde cholangiopancreatography
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Technique and methodsTechnique and methods
TT-tube -tube CholangiographyCholangiography
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Technique and methodsTechnique and methods
PTC 造影
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ERCPERCP
显示胆总管、肝总管及肝内胆管及胰管情况
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CTCT1.1. CTCT plain scan :: (( 11 )) Slice thickSlice thick :: 10MM 10MM ,, 5MM5MM
(( 22 )) Region: cover the whole organRegion: cover the whole organ
2. 2. Enhancement scanning:: (( 11 )) Purpose :: resolutionresolution ,, diagnosis. diagnosis.
vesselsvessels
(( 22 )) MethodsMethods :: Arterial phaseArterial phase (( 20-220-25”5” ),), portal phaseportal phase (( 60”60” ),), delayed phdelayed phasease (( 5-7’5-7’ ))
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Imaging of the hepatic vessels
Artery
Portal vein
Hepatic vein
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Hepatic vesselsHepatic vessels
Hepatic arteryHepatic artery : : Celiac trunk - - comcommon hepatic A.mon hepatic A. - - Proper
hepatic A - - Lt. and Rt. hepatic A.Lt. and Rt. hepatic A.
Portal vein : : left branch 、、 right branright bran
chch Hepatic vein : leftleft 、、 intermediateintermediate 、、
rightright
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Normal anatomy
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Proper hepatic A
Gastro-duodenal A.
脾动脉 splenic artery
SMA superior mesenteric artery
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门脉主干及其分支清晰显示。
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门静脉 CE MRA
3ml/s
20mlGd-DTPA
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门静脉 hepatic portal vein
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Portal vein and hepatic veinPortal vein and hepatic vein
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Hepatic vein
right intermediate left
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肝右 V
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Celiac trunk
Splenic artery
Common hepatic a.
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Hepatic artery
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Left branch of hepatic portal vein
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Right branch of hepatic portal vein
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Hepatic vein
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Liver lobesLiver lobes
Lobes Lobes :: Caudate lobe (S1S1)) ,, Left lobeLeft lobe(( S2S2 、、 3)3) 、、 Quadrate Quadrate lobelobe (( S4S4 ),), Right lobeRight lobe (( S5S5 、、 66 、、77 、、 88 ))
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Liver lobesLiver lobes
Quadrate lobe
上段
下段
Left lobe
Right lobe
右后叶上段
下段
1
上段
下段
左外叶
尾状叶
方叶
左内叶
Right lobe
右后叶
上段
下段
Quadrate lobe
Left lobe
Caudate lobe
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( 二 ) Couinaud 肝段划分法 ( 8 段划分法 )
肝门静脉
肝圆韧带
肝左静脉下腔静脉肝中静脉
肝右静脉
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CTCT
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MRMR
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二、二、 MRIMRI1.MRI 1.MRI plain scan :: SSequence————axialaxial、、 coronal coronal T1WT1W 、、 T2WT2W
FIESTAFIESTA 、、 DWIDWI 、、 double echodouble echo
2. MRI 2. MRI enhancement scanning
3. 3. MRMRAA
4.4. MRCPMRCP Magnetic Resonance Cholangiopancreatography
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T2WI
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T1WI
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ERCP 正常胆道
Bile duct systemBile duct system
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Intrahepatic bile duct
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MRCP
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Pancreas
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CTCT
body of pancreas head of pancreas
splenic veinPortal vein
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tail of pancreas body of pancreas
head of pancreas
MR T1WI
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head of pancreas
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T2 T2 FFAT SATAT SAT
胰腺 pancreatic duct
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胰头胰头
head of pancreasPortal veingallbladder
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23
47 8
6 5
冠状位
GB
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6 56 5
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7 8
6 5
肾上腺
M
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SP
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Disease of the liver
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Hepatic cyst
CCongenital diseaseongenital diseaseCT SCANCT SCAN Delicate, round, smooth, thin-walled hypodense Delicate, round, smooth, thin-walled hypodense
lesionlesion Homogeneous,waterdensity(0-15HU)Homogeneous,waterdensity(0-15HU) No enhancement No enhancement MR MR Very low signal intensity on T1WI and very high Very low signal intensity on T1WI and very high
intensity on T2WIintensity on T2WI
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CT Appearance Hepatic Cyst
-C venous phase
arterial phase
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CT Appearance Hepatic Cyst
Polycystic disease
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MR appearance Hepatic cyst
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Pyogenic abscess - bacterium or Amoeba
Hepatic AbscessHepatic Abscess
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Plain Radiography Plain Radiography
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CT Appearance of hepatic abscessCT Appearance of hepatic abscess Hypodense –hyperdenHypodense –hyperdensse –hypodense e –hypodense
necrosis membrane edemanecrosis membrane edema
20-40HU20-40HU
Gas or fluid levelGas or fluid level
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肝脓肿
肝右叶圆形低密度区,脓肿壁密度高于脓腔、低于正常肝。增强扫描:脓肿壁环形强化,轮廓光滑,厚度均匀,外围可见低密度水肿带
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肝脓肿
肝右叶椭圆形低密度区,增强扫描脓肿壁环形强化,轮廓光滑,厚度均匀,外围可见低密度水肿带
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MR Appearance of abscessMR Appearance of abscess
low signal intensity on T1WI and high low signal intensity on T1WI and high intensity on T2WIintensity on T2WI---inside cavity---inside cavity
Intensity is decreased than the center in the Intensity is decreased than the center in the wallwall
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肝脓肿
肝右叶两个不规则形异常信号
区, T1WI 脓肿壁信号高于脓腔、
低于正常肝, T2WI 反之。增强扫
描:脓肿壁环形强化,轮廓不光滑,边缘不整
平扫 T1WI
平扫 T2WI
静脉期septum
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Common hepatic tumorsCommon hepatic tumors Benign tumor
Cavernous hemangioma
Hepatocellular adenoma
Hamartoma
FFocal nodular hyperplasia (( FNHFNH )) Malignant tumour
HHepatocellular carcinoma epatocellular carcinoma
Cholangiocellular carcinoma
Liver metastasis
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Hemangiomas of liver
Hemangiomas is the most common benign tumor of the liver-- Cavernous hemangioma
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CT appearance of hemangiomas
A. A. Plain scan 11 、、 Low density ,, CT CT vvalue-about alue-about 30HU30HU 22 、、 Homogeneous Homogeneous (In(Inhomogeneoushomogeneous-centrally lower -centrally lower
density in large tumor, Ca or hemorrage) density in large tumor, Ca or hemorrage) B. B. Enhancement scanning
11 、、 rapidly enhancerapidly enhance
22 、、 filling in centripetally to become filling in centripetally to become isodensity with the adjacent parenchymaisodensity with the adjacent parenchyma
33 、、 The time for complete in-filling has The time for complete in-filling has been been : :
>>33’’、、 usually usually 77 ~~ 1515’’、、 most long most long 2020 ~~ 6060’’
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Plain scanPlain scanPlain scanPlain scan
PPortal phaseortal phase DDelayed phaseelayed phasePPortal phaseortal phase DDelayed phaseelayed phase
Arterial phaseArterial phase
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Plain ScanPlain ScanPlain ScanPlain Scan
EEnhancementnhancementEEnhancementnhancement
Delayed scanDelayed scan
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MRI MRI aappearanceppearance 1.1. Round, Clear marginRound, Clear margin
2.2.IntensityIntensity -- Hypointense on Hypointense on T1WIT1WI、、 Hyperintense on Hyperintense on T2WIT2WI ,, longlongTETE((≥≥ 120ms120ms)) long T2 valuelong T2 value““lamp bulb”,”,homogeneouslyhomogeneously
InhomogeneousInhomogeneous caused by thrombosis caused by thrombosis and scar in the centerand scar in the center
3. 3. Enhancement scanning
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Cavernous hemangioma
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Hepatocellular carcinomaHepatocellular carcinoma
Hepatocellular carcinomaHepatocellular carcinoma (HCC (HCC)) VViral iral hepatitidehepatitide infection ( infection (hepatitis Bhepatitis B or or CC) ) CCiirrhosisrrhosis ( (alcoholismalcoholism))
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CTCT
On CT, HCC can have three distinct patterns On CT, HCC can have three distinct patterns of growth:of growth:
Massive typeMassive type------A single large tumor A single large tumor ≥≥ 5cm 5cm NNodular typeodular type------ Multiple tumors Multiple tumors<5cm<5cm DDiffuse typeiffuse type ------Poorly defined tumor with an iPoorly defined tumor with an i
nfiltrative growth pattern nfiltrative growth pattern SSmall hepatocellular carcinomamall hepatocellular carcinoma<3cm<3cm
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Key pointsKey points
The key characteristics on CT are hypervasThe key characteristics on CT are hypervascularity in the arterial phase scans, washout cularity in the arterial phase scans, washout or de-enhancement in the portal and delayeor de-enhancement in the portal and delayed phase studies, a pseudocapsule and a mod phase studies, a pseudocapsule and a mosaic pattern. Both calcifications and intralesisaic pattern. Both calcifications and intralesional fat may be appreciated.onal fat may be appreciated.
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Important features that guide Important features that guide treatment include:treatment include:
size size spread (spread (stagestage) ) involvement of liver vessels involvement of liver vessels and bile ductand bile duct presence of a tumor capsule presence of a tumor capsule presence of extrahepatic metastases presence of extrahepatic metastases presence of daughter nodules presence of daughter nodules vascularity of the tumor vascularity of the tumor
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CT appearance of HCCCT appearance of HCC
Shape and marginShape and margin (1) (1) Regular or irregularRegular or irregular (2)(2) Clear margin Clear margin——pseudo-capsulepseudo-capsule
(3) (3) iill-definedll-defined marginmargin——infiltrating infiltrating
growinggrowing
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CT appearance of HCCCT appearance of HCC
DensityDensity (( 11 )) hypodensehypodense (( commoncommon ))
(( 22 )) isodense or isodense or hyperdensehyperdense (( rarerare ))
(( 33 )) mixed densitymixed density (( hemorrage, hemorrage, necrosis, calcification and fatty degenerationnecrosis, calcification and fatty degeneration ))
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低密度低密度低密度低密度 高密度高密度高密度高密度
稍低密度稍低密度稍低密度稍低密度 混杂密度混杂密度混杂密度混杂密度
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CT appearance of HCCCT appearance of HCC
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CT enhancementCT enhancement
Blood supplyBlood supply
11 )) normal tissuenormal tissue :: 25% 25% ffrom hepatic rom hepatic arteryartery
75%75% from portal vein from portal vein22 )) HCCHCC : : 90% 90% ffrom hepatic arteryrom hepatic artery 10% 10% from portal veinfrom portal vein
EnhancementEnhancement hypervascularity in the arterial phase scans, washout hypervascularity in the arterial phase scans, washout
or de-enhancement in the portal and delayed phaseor de-enhancement in the portal and delayed phase
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CT appearance of HCCCT appearance of HCC
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巨块型肝癌、肝内子灶、IVC
癌
栓
CT appearance of HCCCT appearance of HCC
Massive type
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肝硬化合并原发性结节型肝癌 nodular type
CT appearance of HCCCT appearance of HCC
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CT appearance of HCCCT appearance of HCC
原发型肝细胞癌合并门静脉、下腔静脉癌栓
Diffuse type
IVC
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MR appearance of HCCMR appearance of HCC
Low signal intensity on T1WI and high Low signal intensity on T1WI and high intensity on T2WIintensity on T2WI
Low signal capsule on T1WILow signal capsule on T1WI
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MR appearance of HCCMR appearance of HCC
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time
CT Value
HCC
Hemangioma
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CT-HCT-Hepatic metastasisepatic metastasis
Hypodense lesion, round, multiple Hypodense lesion, round, multiple Central necrosis and rim enhancementCentral necrosis and rim enhancement bull's-eye configuration
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CT-HCT-Hepatic metastasisepatic metastasis
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CT-HCT-Hepatic metastasisepatic metastasis
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– CholesterolCholesterol stones stones, , Pigment stonesPigment stones, , Mixed stoMixed sto
nesnes
– 2020 ~~ 3030% of gallstones are radio-opaque% of gallstones are radio-opaque
CCholelithiasisholelithiasis
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• X-ray : Radio-opaque stones, round or irregularRadio-opaque stones, round or irregular
• Cholecystography: Filling defect• CT : Ringlike calcification, CT value -60 ~ 140HU• MR : Hypointense
------ Complicating with cholangiectasis and cholangitis
CCholelithiasis-radiologic findingsholelithiasis-radiologic findings
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CCholelithiasisholelithiasis
平 片
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CCholelithiasisholelithiasis
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CCholelithiasisholelithiasis
Cholecystography----radioparent calculus
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CCholelithiasisholelithiasis
TT-tube -tube CholangiographyCholangiography
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CCholelithiasisholelithiasis
PTC 造影
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CTCT
cholecystolithiasis
CCholelithiasisholelithiasis
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CCholelithiasisholelithiasis
cholecystographyCT 检查
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CCholelithiasisholelithiasis
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CCholelithiasisholelithiasis
MRCP
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Imaging findingsImaging findings ::– CTCT ::
Thickening of the wallThickening of the wall>>33 mmmm Acute stageAcute stage :: edema edema Chronic stageChronic stage :: shrink,shrink,calcification of the
wall cholelithiasis
Cholecystitis
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cholecystitis
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Chronic cholecystitis : shrink of the gallbladder and thickening wall
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CalcificationCalcification
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Pancreatitis
Acute pancreatitisAcute pancreatitis Excessive swelling of the pancreas, Excessive swelling of the pancreas,
surrounded by isodense or slightly surrounded by isodense or slightly hypodense exudative zones.hypodense exudative zones.
Perirenal fasciae are visible and thickenedPerirenal fasciae are visible and thickened Hemorrhagic and necrosis Hemorrhagic and necrosis
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Acute pancreatitisAcute pancreatitis
Excessive swelling of the pancreas
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Acute pancreatitisAcute pancreatitis
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Acute Acute pancreatitispancreatitis
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Chronic Pancreatitis
Calcification Calcification Pancreatic atrophy or swellingPancreatic atrophy or swelling Dilatation of the pancreatic duct Dilatation of the pancreatic duct Pseudocysts 30%Pseudocysts 30%
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PseudocystsPseudocysts
Chronic Pancreatitis
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慢性胰腺炎慢性胰腺炎– 胰管串珠样增粗胰管串珠样增粗– 合并胆总管结石合并胆总管结石– 慢性胆囊炎慢性胆囊炎
Chronic Pancreatitis
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Chronic Pancreatitis
CalcificationCalcification
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临床与病理临床与病理– 上段上段胆管占胆管占 5050 %以上%以上– 早期出现早期出现胆道梗阻症状胆道梗阻症状– 分型:浸润型、结节型、乳头型分型:浸润型、结节型、乳头型
肝胆胰脾肝胆胰脾 ------ 胆管癌胆管癌
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影像学表现:• PTC 或 MRCP :胆管局限性狭窄或息肉样充盈缺损,
近段胆管扩张,呈“软藤征”。• CT :近段胆管扩张
远侧可见低密度肿瘤影(浸润型见不到肿块)• MRI :近段胆管扩张,远侧可见肿瘤影
肝胆胰脾肝胆胰脾 ------ 胆管癌胆管癌
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肝胆胰脾肝胆胰脾 ------ 胆管癌胆管癌
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肝胆胰脾肝胆胰脾 ------ 胆管癌胆管癌