Checklist

— Directly below the right hemidiaphragm

• Attenuation values (see below)

• Homogeneous internal parenchymal structure, no focal abnormalities

• Intrahepatic bile ducts:

— Course (centrifugal)

— Width (general rule: ducts should no longer be visible after contrast administration)

• Extrahepatic bile ducts:

— Course (from porta hepatis to head of pancreas)

— Contents of homogeneous fluid density

— Contours (smooth and sharp)

— Wall thickness (see below; no general or circumscribed thickening)

— No pericholecystic fluid

• Gallbladder contents:

— Homogeneous

— No calculi (hypodense or hyperdense)

— Porta hepatis occupied by the hepatic artery, common bile duct, and portal vein; no masses or lymphadenopathy

— Costophrenic sinus clear and aerated on both sides; no pleural effusion, no infiltrates, no masses

Spleen

Pancreas

Adrenal glands, kidneys (if visualized) Abdominal cavity

Soft tissues

Position Configuration Size (see below)

Density (homogeneous internal structure)

Contours (smooth)

Position

Configuration

Size

Density (homogeneous internal structure) Contours (smooth, lobulated) Pancreatic duct

Para-aortic region unremarkable Position

Size (see below) Internal structure

Intestinal structures (if visualized and evaluable: configuration, width, wall thickness) No free extraintestinal or intra-abdominal air or fluid

Important Data

Dimensions

1

Liver:

a Angle of left hepatic border: ca. 45°

b Caudate lobe/right lobe (CL/RL) = 0.37 ± 0.16 (e.g., 0.88 ± 0.2

in cirrhosis. Reference lines [from medial side]: line I is tan

gent to the medial border of the caudate lobe; line II is paral

lel to I and tangent to the lateral aspect of the portal vein;

line III is tangent to the lateral hepatic border and perpen

dicular to a line midway between the portal vein and infe-

rior vena cava and perpendicular to I and II.

c Left lobe (anteroposterior diameter measured on the para-

vertebral line): up to 5 cm

2

Portal vein:

• Up to 1.5 cm

3

Hepatic veins:

• Up to 0.5 cm

4

Gallbladder:

• Horizontal diameter up to 5 cm (> 5 cm is suspicious for hy-

drops)

5

Width of gallbladder wall:

• 1-3 mm

6

Width of common bile duct:

• < 8 mm (after cholecystectomy: < 10 mm)

Spleen:

• Depth (D): 4-6 cm

• Width (W): 7-10 cm

• Length (L): 11-15 cm

• Splenic index: DxWxL = 160-440

Kidneys:

• Craniocaudal diameter: 8-13 cm

• Anteroposterior diameter: ca. 4 cm

• Transverse diameter 5-6 cm

Position of superior poles:

• Right: superior border of L1

• Left: inferior border of T12

Width of renal cortex:

• 4-5 mm

Gerota fascia (thickness):

• 1 -2 mm

Adrenal glands (variable):

• Crural thickness <10 mm

Diameter of abdominal aorta:

• Approximately 18-30 mm

Lymph nodes larger than 1 cm are suspicious for pathology.

Attenuation values

• Liver: 65 ± 10 HU

• Gallbladder contents: 0-25 HU

• Spleen: 45 ± 5 HU

• Pancreas: 40 ± 10 HU

• Fat: -65 to -100 HU

• Kidneys: 35-45 HU without contrast medium

• Adrenal glands: 25-40 HU without contrast medium

• Muscle: 45 ± 5 HU

• Blood vessels: ca. 40-55 HU without contrast medium

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