Systematic Scanning Planes

Systematic Scanning Planes for liver

1. Longitudinal section of the liver and the abdominal aorta
Scanning Method Probe is placed vertically in the middle line of the subxiphoid.
Section Structure

1. LL- Left lobe
2. CA- celiac artery
3. LA- left atrium
4. PB- pancreatic body
5. SpV- splenic vein
6. SpA- Splenic artery
7. SMA- superior mesenteric artery
8. Ao- aorta
9. E- Esophagus

Measuring Method Measuring anteroposterior diameter of the left hepatic lobe from the top of anterior capsule to the posterior capsule. Anteroposterior diameter should be less than 7 cm in the normal liver.
The Clinical Application Value This plane is the standard section for measuring anteroposterior diameter of the left liver lobe. The size, shape, and parenchyma echogenicity of the liver are observed.

2. Longitudinal scanning of the liver through the inferior vena cava on subxiphoid.
Scanning Method Probe is placed vertically in the subxiphoid, slightly inclined to the right
Section Structure

1. QL- quadrate lobe
2. MHV- middle hepatic vein
3. IVC- inferior vena cava
4. CL- caudate lobe
5. CBD- common bile duct
6. PV- portal vein

Measuring Method Measuring the diameter of the inferior vena cava (segment of the posterior liver and segment of entering the right atrium).
The Clinical Application Value The placeholder lesions, expansion, narrowness, blood clots, etc, in the inferior vena cava such as Budd-Chiari’s syndrome are diagnosed by this plane. Diameter of the inferior vena cava changes with breathing, narrows when exhaling, and widens when inhaling.

3. Transverse scan of the left and right liver through the porta hepatis on subxiphoid
Scanning Method Probe is transversely placed on the level of the subxiphoid, scanning slightly oblique to the right posterior. The patient should be in full and suspended inspiration to make the liver move down.
Section Structure

1. LL- Left lobe
2. RL-Right lobe
3. QL- quadrate lobe
4. CHD- Common hepatic duct
5. RPV- Right portal vein
6. CL- caudate lobe
7. IVC- inferior venacava
8. LPV-Left portal vein
9. 1- umbilical and sagittal portion of left portal vein
10. 2- External inferior branch of left portal vein
11. 3- External superior branch of left portal vein
12. 4- Right hepatic bile duct
13. 5- Left hepatic bile duct

Measuring Method Measuring the right and left portal vein inner diameter, its normal value should be less than 0.8 cm.
The Clinical Application Value This section can be used to determine location of the left lobe diseases. To observe the region of the porta hepatis, measuring the right portal vein and left portal vein. The bifurcation of the portal vein separating the caudate lobe from the quadrate lobe. sagittal segment of the left portal vein is the boundary of the left interior lobe and the eft exterior lobe. The caudate lobe is located between portal vein and inferior vena cava.

4. Transverse section of the left hepatic lobe through the left portal vein branches by subxiphoid
Scanning Method Probe is put horizontally at the level of subxiphoid to scan toward the posterior-superior.
Section Structure

1. LTH- ligament teres hepatis
2. LL- Left lobe
3. CL- caudate lobe
4. IVC- inferior vena cava
5. RL-Right lobe
6. 1- left portal vein branches
7. 2- external inferior branch of left portal
8. 3- superior branch of the left portal vein

Measuring Method The inner diameter of the sagittal segment of the left portal vein is measured; generally, the sagittal diameter should be less than 10 mm, but the sagittal. Sagittal segment can be a congenital variant. It will be wide in the case of portal vein hypertension patients. The thickness of the caudate lobe is measured, and its normal upper limit is 30 mm.
The Clinical Application Value (1) Positioning of the left lobe lesion location. The sagittal segment of the left portal vein will separate the left interior lobe from the left exterior lobe. Link line of the left hepatic cross-sectional and midpoint attachment of left portal vein branches separates the left exterior-superior lobe and the left inferior lobe. (2) Observing the left portal branch whether it appears dilated or narrow, with the presence of emboli, (3) and whether there is dilation of the left intrahepatic bile duct. (4) The inferior vena cava obstruction, severe cirrhosis, or morphological change of the liver can cause caudate lobe enlargement.

5. Longitudinal scanning of the left hepatic lobe through the caudate lobe and medial lobe.
Scanning Method Probe is placed in the middle line of the subxiphoid vertically.
Section Structure

1. LL-Left lobe
2. VL- venosus ligament
3. CBD-common bile duct
4. PV- Portal vein
5. IVC- Inferior vena cava
6. CL- Caudate lobe
7. 1- sagittal of left portal vein

Measuring Method Measuring the anteroposterior diameter of the caudate lobe. It should be less than 30 mm in the normal liver
The Clinical Application Value This is a standard section for measuring the anteroposterior diameter of the caudate lobe. To observe the size, shape, and echogenicity of the hepatic parenchyma of the caudate lobe.

6. Oblique scanning of the left external hepatic lobe.
Scanning Method Probe is placed on the subxiphoid transversely.
Section Structure

1. LL- Left lobe
2. P-Pancreas
3. SpV-splenic vein
4. VL- venosus ligament
5. CL-caudate lobe
6. Ao- aorta
7. IVC- inferior vena cava
8. St- stomach
9. 1- sagittal left portal vein

Measuring Method Oblique section of the left external hepatic lobe, caudate lobe, umbilical, inferior vena cava and sagittal section of the left portal vein
The Clinical Application Value To observe the size, shape, and parenchyma echogenicity of the left external lobe of the liver, especially to observe the area near the external edge of the left external hepatic lobe to distinguish the mass in the liver from that outside.

7. Oblique Scanning of the Left Hepatic Lobe and Caudate Lobe
Scanning Method The patient should be on fast for 8–12 h with a supine position. The subxiphoid transverse scanning is made, and the direction of the acoustic beam is toward the posterior-superior.
Section Structure

00
Measuring Method 00
The Clinical Application Value 00

00
Scanning Method 00
Section Structure 00
Measuring Method 00
The Clinical Application Value 00

00
Scanning Method 00
Section Structure 00
Measuring Method 00
The Clinical Application Value 00

00

• 00
• 00
• 00
• 00
• 00
• 00

00

• 00
• 00
• 00
• 00
• 00
• 00