Segment 5 to 8 make up the right hemiliver and are easier to describe:
segment 5 (V) is located below the portal plane between the middle and right hepatic veins.
segment 6 (VI) is located below the portal plane to the right of the right hepatic vein.
How are liver segments defined?
A liver segment is one of eight segments of the liver as described in the widely used Couinaud classification (named after Claude Couinaud) in the anatomy of the liver. This system divides the lobes of the liver into eight segments based on a transverse plane through the bifurcation of the main portal vein.
What is CT of liver?
CT scans of the liver and biliary tract (the liver, gallbladder, and bile ducts) can provide more detailed information about the liver, gallbladder, and related structures than standard X-rays of the abdomen, thus providing more information related to injuries and/or diseases of the liver and biliary tract.
How do you remember liver segments?
The segments are represented by the following:
segment 1: (caudate): the thumb, in the palm of the hand.
segment 2: index finger proximal phalanx.
segment 3: index finger middle phalanx.
segment 4a: middle finger proximal phalanx.
segment 4b: middle finger middle phalanx.
segment 5: ring finger middle phalanx.
Where are the segments of the liver?
The portal vein divides the liver into upper (2, 4a, 8, 7) and lower (3, 4b, 5, 6) segments, and can usually be identified without IV contrast. A line drawn from the middle of the gallbladder fossa to the IVC (green) roughly divides the liver into left and right lobes.
How many segments are in liver?
Based on Couinaud classification, the liver is divided into eight independent functional segments (Figs. 6 and 7). Each segment has its own portal pedicle consisting of the hepatic arterial branch, portal branch, and the bile duct with a sepa- rate hepatic venous branch that provides outflow (Fig.
Can a CT scan detect liver disease?
A group of blood tests called liver function tests can be used to diagnose liver disease. Other blood tests can be done to look for specific liver problems or genetic conditions. Imaging tests. An ultrasound, CT scan and MRI can show liver damage.
What segments are in the right lobe of the liver?
The functional right lobe of the liver is made up of segments V and VIII, the anterior segments, and segments VI and VII, the posterior segments. Segment I, the caudate lobe, is located posteriorly. The outflow of the liver is provided by the three hepatic veins.
What are the surgical segments of liver?
Surgical Resection Term
Right anterior section/sector
Right anterior sectionectomy/sectorectomy
Right posterior section/sector
Right posterior sectionectomy/sectorecomty
Left medial section
Left medial sectionectomy
What are liver segments?
According to Couinaud, each half of the liver contains four segments (usually but not essentially using Roman numerals): segments I (caudate lobe) to IV on the left, and V to VIII on the right. Each segment basically has a portal vein branch at its centre and a hepatic vein at its margin.
What are the segments of the liver?
The liver is divided into three functional lobes: the right lobe, the left lobe, and the caudate lobe. The right and left lobes are further divided into 2 segments each: The anterior and posterior segments of the right lobe. The medial and lateral segments of the left lobe.
What is CT scan renal protocol?
A CT scan of the kidney may be performed to assess the kidneys for tumors and other lesions , obstructions such as kidney stones, abscesses, polycystic kidney disease, and congenital anomalies, particularly when another type of examination, such as X-rays or physical examination, is not conclusive.
What is a liver CAT scan?
A computed tomography (CT) scan of the liver is a detailed medical imaging study used in situations where a doctor suspects there is damage to the liver such as bleeding or a tumor. Patients should plan on setting aside several hours for the test and may want to arrange a ride home,…