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Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
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250

M. Zhang

 

 

1.23.1\ Scanning Method

The patient should be on fast for 8–12 h. Subcostal scanning should be performed with the patient in a supine or left lateral decubitus position; deep inspiration makes the liver go down as an acoustic window.

1.23.2\ Section Structure

Major areas: longitudinal section of the right liver, right portal vein; oblique scan of the inferior vena cava, hepatic artery, and common biliary duct; sagittal section of the pancreatic head.

1.23.3\ Measuring Method and Normal

Generally the right portal vein diameter should be less than 1.0 cm. Pulsed Doppler can achieves

portal vein flow at this section. The inner diameter of the common bile duct can be measured.

1.23.4\ Clinical Application Value

This is the standard scan of the porta hepatis, which can be used to observe the portal vein, right portal vein, common bile duct, hepatic artery and liver parenchymal near the porta hepatis, and to determine whether the portal vein, common hepatic artery, and right hepatic biliary duct have dilations and whether there is abnormal echogenicity in them and to observe the size, shape, and parenchyma echogenicity of the right liver and to determine whether there is lymphadenhypertrophy in area of the porta hepatis.

8  The Digestive System Organ Scanning

1.24\ Transverse Scanning of the Porta Hepatis

from the Right Subcostal

Fig. 8.24  Transverse scan of the porta hepatis from the right subcostal

Gb

CBD

IVC

RL

251

LL

PHA

PV

Ao

252

M. Zhang

 

 

1.24.1\ Scanning Method

Patient should be on fast for 8–12 h. Subcostal transversely scanning of porta hepatis should be performed with patients in a left lateral decubitus or supine position; deep inspiration makes the liver go down as an acoustic window.

1.24.2\ Section Structure

Major areas: transverse section of the portal vein, common bile duct, and proper hepatic artery, which have been referred to as the Mouse Sign by Bartrum and Crow.

Ancillary areas: transverse section of the gallbladder neck, pancreatic neck, right anterior lobe, and left internal lobe of the liver.

1.24.3\ Clinical Application Value

To observe gallbladder neck diseases which may not be found by the standard longitudinal scanning and to show the position relationship of the portal vein, common bile duct, and proper hepatic artery.