Liver segments Infographic
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1) Segment 1 lies between the inferior vena cava, ligamentum venosum, and left branch of the portal vein. It is unique in receiving branches from both the right and left portal veins and draining directly into the inferior vena cava. 2) Segments 2 and 3 form the lateral part of the left lobe and are located to the left of structures including the umbilical portion of the portal vein and falciform ligament. 3) Segment 4, also known as the quadrate lobe or medial segment of the left lobe, is bounded by structures including the umbilical portion of the left portal vein and falciform ligament. It is subdivided into segments
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The liver has significant anatomic variability. It develops from the foregut and is divided into lobes based on vascular and biliary anatomy. The caudate lobe is located posteriorly between the IVC and other lobes. It has complex vascular and biliary drainage patterns. The liver is commonly divided into segments based on Couinaud's or Brisbane's classifications to describe resection types. The caudate lobe specifically can be further divided into the Spiegel lobe, caudate process, and paracaval portion.
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The liver has complex anatomy and vasculature. It is divided into 4 lobes and 8 segments based on blood supply. The liver receives dual blood supply from the hepatic artery and portal vein. It has 3 major functions - metabolism, protein synthesis, and bile production. The bile duct drains bile from the liver into the small intestine.
PPT 1
The document provides information about the anatomy and imaging of the liver. It discusses the embryology, gross anatomy including surfaces and lobes, blood supply, and venous drainage of the liver. It then covers ultrasound, CT, MRI, angiography, nuclear medicine imaging, and PET/CT imaging of the liver, describing the appearance of normal liver and protocols for each modality.
1-anatomy ppts egrp.pdf
The liver arises from the foregut and develops into lobes separated by fissures and ligaments. The normal liver appears homogenous on ultrasound. There are typically three main hepatic veins that drain the liver into the inferior vena cava, though variants are common. The portal vein supplies blood from the gastrointestinal tract and splenic vein. Variants of the hepatic arteries and bile duct branching are also frequent. The gallbladder's position can vary or be duplicated. Bile ducts have characteristic branching patterns but often differ from standard descriptions.
anat of urinary sys.ppt
This document provides an overview of the embryological development and radiological anatomy of the kidney, ureter, and bladder. It describes the development of the pronephros, mesonephros and metanephros from the intermediate mesoderm. Key details about the anatomy and variations of the kidney calyces, pelvis, cortex and medulla are discussed. The course and appearance of the ureter on intravenous pyelogram is also summarized.
C:\documents and settings\user\desktop\gastrointestinal 0406 liverpdf
This document provides an overview of the anatomy of the gastrointestinal system, with a focus on the liver, gallbladder, and biliary system. It describes the structure and connections of the liver, including its lobes, ligaments, and vascular supply. It then discusses the gallbladder, its attachment to the liver, blood supply, and structure. Finally, it details the biliary system, including the branching of the hepatic ducts, formation of the common bile duct, and termination of the bile and pancreatic ducts in the duodenum.
Anatomy of liver
The liver is the largest internal organ located in the right upper quadrant of the abdomen. It has two surfaces - the diaphragmatic surface and visceral surface. The liver is divided into 8 segments based on the Couinaud classification which describes the functional anatomy and vascular supply. This allows for resection of individual segments without damaging other segments. The segments are delineated by the hepatic veins and portal scissurae into right, left, caudate and quadrate lobes.
26-Liver& biliary.ppt1⅗a
The liver is the largest gland in the body located in the upper abdominal cavity. It has multiple functions including producing bile and synthesizing heparin. It has four surfaces and is divided into left and right lobes separated by the falciform ligament. The liver receives blood from the hepatic artery and portal vein, and the blood drains into the hepatic veins which empty into the inferior vena cava. It is surrounded by ligaments that attach it to other structures and is composed of lobules containing sinusoids and central veins.
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Liver segments Infographic
- 1. Ultrasound evaluation of liver segments Dr. Durr-e-Sabih. MBBS.MS. FRCP. FANMB Multan ultrasound Service- Distt Jail Road- Multan Pakistan. dsabih@yahoo.com Segment Segment 1 lies between the inferior vena cava; the ligamentum venosum and the left branch of portal vein. It is unique that it can receive branches from both the right as well as left portal veins and has hepatic veins that drain directly into the inferior vena cava. It is quite easy to identify on ultrasound. On a transverse section ,this can have a quadrilateral shape but on a sagittal section, it is more wedge shaped. 1,2,3 2,3 Segments 2 and 3 form the lateral part of the left lobe and are located to the left of the umbilical portion of the portal vein, the ligamentum venosum and the falciform ligament. 4 This is the quadrate lobe, or the medial segment of the left lobe in classical anatomy and is located on both sides of the horizontal portion of the left portalvein (pars transversa). Boundaries include the umbilical portion of the left portal vein and the falciform ligament separating it from segments 2 and 3; the ligamentum venosum separates it from segment 1 posteriorly. Laterally the middle hepatic vein and the main hepatic hepatic fissure separates this from the right lobe segments 5 and 8. Segment 4 is itself subdivided into a superiorly located segment 4A and inferiorly located segment 4B by the horizontal segment of the left portal vein (pars transvera). 5-8 Segments 5 - 8 make up the right lobe and are further divided into anterior (5 and 8) and posterior sub-sets (6 and 7). The right hepatic vein forms the boundary between the anterior and posterior subsets, and a line from the right portal vein divides the segments into superior (7 and 8) and inferior (5 and 6) sub-sets. The intersegmental boundaries are not anatomical and this makes right lobe segment identification somewhat difficult. 5 Segment 5 appears on a longitudinal section immediately to the right of the main portal vein, and in some patients can include the part of liver in front of the gallbladder, but since the fundus of the gallbladder can have in inconstant position, this relationship cannot be assumed in every patient. 6 This lies behind and lateral to segment 5 and is right in front of the right kidney; so whenever you are seeing the right kidney; the liver immediately anterior to it is segment 6. 7 This lies cranial to segment 6 and forms the anterolateral part of the dome of the right lobe of the liver. Lateral and posterior to the right hepatic vein Between the right hepatic vein and the diaphragm 8 Cranial to segment 5 The segments are distribution in different planes in the liver volume, with segment 1 being completely posterior and segments 6 and 7 being mostly posterior. The ligaments in the fissures, portal and hepatic vessels are used to locate the segments. The portal vein branches run to the centre of the segments except the ascending branch of the left portal vein, that runs in the left intersegmental fissure; helping to divide the medial from the lateral part of the left lobe, segment 3 from segment 4 Segments on Transverse sections