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Advanced surface reconstruction technique to build detailed surface models of the liver and neighboring structures from the Visible Korean Human.

Shin DS, Chung MS, Lee JW, Park JS, Chung J, Lee SB, Lee SH - J. Korean Med. Sci. (2009)

Bottom Line: From the segmented images, serial outlines of each structure were stacked; on the popular commercial software, advanced surface reconstruction technique was applied to build surface model of the structure.A surface model of the liver was divided into eight models of hepatic segments according to distribution of the portal vein.The surface models will be distributed to encourage researchers to develop the various kinds of medical simulation of the abdomen.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.

ABSTRACT
Unlike volume models, surface models, which are empty three-dimensional images, have small file size, so that they can be displayed, rotated, and modified in a real time. For the reason, the surface models of liver and neighboring structures can be effectively applied to virtual hepatic segmentectomy, virtual laparoscopic cholecystectomy, and so on. The purpose of this research is to present surface models of detailed structures inside and outside the liver, which promote medical simulation systems. Forty-seven chosen structures were liver structures such as portal triad, hepatic vein, and neighboring structures such as the stomach, duodenum, muscles, bones, and skin. The structures were outlined in the serially sectioned images from the Visible Korean Human to prepare segmented images. From the segmented images, serial outlines of each structure were stacked; on the popular commercial software, advanced surface reconstruction technique was applied to build surface model of the structure. A surface model of the liver was divided into eight models of hepatic segments according to distribution of the portal vein. The surface models will be distributed to encourage researchers to develop the various kinds of medical simulation of the abdomen.

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Surface model of the portal vein, which is differently colored according to the segmental branches (A). Surface model of the liver, which is divided into models of the hepatic segments (B).
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Figure 7: Surface model of the portal vein, which is differently colored according to the segmental branches (A). Surface model of the liver, which is divided into models of the hepatic segments (B).

Mentions: On Maya, a surface model of the portal vein was differently painted according to segmental branches. Among the portal triad in the liver, the portal vein was the thickest, therefore, many branches of the portal vein could be segmented and surface reconstructed. This was the reason of why we decided to use the portal vein branches for dividing a surface model of the liver into surface models of hepatic segments in the next procedure. The surface model of the portal vein and the semitransparent models of the liver, gallbladder, inferior vena cava, and hepatic vein were together observed at different angles. The portal vein bifurcated into left and right branches, between which the gallbladder, inferior vena cava, and intermediate hepatic vein were located. Subsequently, the left branch split into branches to hepatic segments I, II, III, and IV, while the right branch to hepatic segments V, VI, VII, and VIII. The branch to hepatic segment I was identified by the fact that hepatic segment I is the caudate lobe. Likewise, the branches to the other hepatic segments were identified; we just regarded the area of every hepatic segment in anatomy textbook (13). Therefore, there happened unexpected branches of the portal vein. For example, a branch bifurcated into a subbranch to hepatic segment V and another subbranch, which was the common trunk to hepatic segments V and VIII. After full identification, surface model of the portal vein was painted particularly according to segmental branches by using 'paint color' tool (Fig. 7A).


Advanced surface reconstruction technique to build detailed surface models of the liver and neighboring structures from the Visible Korean Human.

Shin DS, Chung MS, Lee JW, Park JS, Chung J, Lee SB, Lee SH - J. Korean Med. Sci. (2009)

Surface model of the portal vein, which is differently colored according to the segmental branches (A). Surface model of the liver, which is divided into models of the hepatic segments (B).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2698180&req=5

Figure 7: Surface model of the portal vein, which is differently colored according to the segmental branches (A). Surface model of the liver, which is divided into models of the hepatic segments (B).
Mentions: On Maya, a surface model of the portal vein was differently painted according to segmental branches. Among the portal triad in the liver, the portal vein was the thickest, therefore, many branches of the portal vein could be segmented and surface reconstructed. This was the reason of why we decided to use the portal vein branches for dividing a surface model of the liver into surface models of hepatic segments in the next procedure. The surface model of the portal vein and the semitransparent models of the liver, gallbladder, inferior vena cava, and hepatic vein were together observed at different angles. The portal vein bifurcated into left and right branches, between which the gallbladder, inferior vena cava, and intermediate hepatic vein were located. Subsequently, the left branch split into branches to hepatic segments I, II, III, and IV, while the right branch to hepatic segments V, VI, VII, and VIII. The branch to hepatic segment I was identified by the fact that hepatic segment I is the caudate lobe. Likewise, the branches to the other hepatic segments were identified; we just regarded the area of every hepatic segment in anatomy textbook (13). Therefore, there happened unexpected branches of the portal vein. For example, a branch bifurcated into a subbranch to hepatic segment V and another subbranch, which was the common trunk to hepatic segments V and VIII. After full identification, surface model of the portal vein was painted particularly according to segmental branches by using 'paint color' tool (Fig. 7A).

Bottom Line: From the segmented images, serial outlines of each structure were stacked; on the popular commercial software, advanced surface reconstruction technique was applied to build surface model of the structure.A surface model of the liver was divided into eight models of hepatic segments according to distribution of the portal vein.The surface models will be distributed to encourage researchers to develop the various kinds of medical simulation of the abdomen.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.

ABSTRACT
Unlike volume models, surface models, which are empty three-dimensional images, have small file size, so that they can be displayed, rotated, and modified in a real time. For the reason, the surface models of liver and neighboring structures can be effectively applied to virtual hepatic segmentectomy, virtual laparoscopic cholecystectomy, and so on. The purpose of this research is to present surface models of detailed structures inside and outside the liver, which promote medical simulation systems. Forty-seven chosen structures were liver structures such as portal triad, hepatic vein, and neighboring structures such as the stomach, duodenum, muscles, bones, and skin. The structures were outlined in the serially sectioned images from the Visible Korean Human to prepare segmented images. From the segmented images, serial outlines of each structure were stacked; on the popular commercial software, advanced surface reconstruction technique was applied to build surface model of the structure. A surface model of the liver was divided into eight models of hepatic segments according to distribution of the portal vein. The surface models will be distributed to encourage researchers to develop the various kinds of medical simulation of the abdomen.

Show MeSH