Construction of a High-quality Voxel Model VKH-Man Using Serially Sectioned Images from Visible Korean Human Project in Korea

Choi, Sang Hyoun; Jeong, Jee–Heon; Cho, Sungkoo; Chung, Min Suk; Huh, Hyun Do; Kim, Woo Chul; Cho, Kun Woo; Kim, Chan Hyeong

doi:10.1080/00223131.2008.10875816

Cited by 6 publications

(6 citation statements)

References 9 publications

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“…We used High-Definition Reference Korean-Man (HDRK-Man), the computational human phantom developed in Hanyang University Radiation Engineering Laboratory (HUREL) ( Figure 2) to create human body like CT image. This phantom is the Polygon-Surface Reference Korean-Man [8] by converting the Visible Korean Human-Man voxel phantom [7] and adjusting the CT data to that of reference Korean data for height (171 cm), weight (68 kg), and 30 organs and tissue sizes. This phantom was used as VMAT QA-dedicated CT Image and will be called pcsr phantom here for convenience.…”

Section: Jrprmentioning

confidence: 99%

“…In this work, we tried to develop the exclusive VMAT plan as regular machine QA simulating alike real VMAT plan. The computational human phantom developed by Choi et al [7] was used to simulate a real humanlike body. The body was divided simply into five anatomical sections and VMAT plans representing each section were created from real VMAT plans.…”

Section: Introductionmentioning

confidence: 99%

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Plan-Class Specific Reference Quality Assurance for Volumetric Modulated Arc Therapy

Rahman

Kim

2019

J Radiat Prot Res

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Background: There have been much efforts to develop the proper and realistic machine Quality Assurance (QA) reflecting on real Volumetric Modulated Arc Therapy (VMAT) plan. In this work we propose and test a special VMAT plan of plan-class specific (pcsr) QA, as a machine QA so that it might be a good solution to supplement weak point of present machine QA to make it more realistic for VMAT treatment. Materials and Methods: We divided human body into 5 treatment sites: brain, head and neck, chest, abdomen, and pelvis. One plan for each treatment site was selected from real VMAT cases and contours were mapped into the computational human phantom where the same plan as real VMAT plan was created and called plan-class specific reference (pcsr) QA plan. We delivered this pcsr QA plan on a daily basis over the full research period and tracked how much MLC movement and dosimetric error occurred in regular delivery. Several real patients under treatments were also tracked to test the usefulness of pcsr QA through comparisons between them. We used dynalog file viewer (DFV) and Dynalog file to analyze position and speed of individual MLC leaf. The gamma pass rate from portal dosimetry for different gamma criteria was analyzed to evaluate analyze dosimetric accuracy. Results and Discussion: The maxRMS of MLC position error for all plans were all within the tolerance limit of < 0.35 cm and the positional variation of maxPEs for both pcsr and real plans were observed very stable over the research session. Daily variations of maxRMS of MLC speed error and gamma pass rate for real VMAT plans were observed very comparable to those in their pcsr plans in good acceptable fluctuation. Conclusion: We believe that the newly proposed pcsr QA would be useful and helpful to predict the mid-term quality of real VMAT treatment delivery.

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Section: Jrprmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plan-Class Specific Reference Quality Assurance for Volumetric Modulated Arc Therapy

Rahman

Kim

2019

J Radiat Prot Res

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“…Different voxel models for EMF evaluation purpose from different countries have been published. They are Visible Human model [1], Norman model [2], Korean models [3], Japanese models [4], Zubal models [5] and virtual family [6]. Exposure with the same incident power density will lead to drastic change in terms of whole body averaged SAR (WBSAR) for the distinctive voxel models.…”

Section: Introductionmentioning

confidence: 99%

Chinese human voxel models for evaluation of EMF exposure purpose: in development

Tan

Zhao

et al. 2010

2010 Asia-Pacific International Symposium on Electromagnetic Compatibility

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This paper presents the work of establishing Chinese human voxel model on basis of Chinese Visible Human database. The original data are segmented by the experienced operators. The head of the female model is introduced as the example. Work for plan of segmentation, 2D-3D re-construction and evaluation for EMF exposure have been presented in details. The same configuration has been applied for the female voxel model from Virtual Family and comparison result about 10g averaged maximal SAR has been shown. Further researches such as inter-model comparison and models of children at different ages are also discussed.

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“…To develop the surface phantom, first, a voxel phantom called VKH-Man 9) was developed using serially sectioned color slice images of a human body (Hkiwtg" 4). Then, the VKH-Man voxel phantom was converted to a surface phantom.…”

Section: Kk0"uwthceg"rjcpvqo"rutm/ocp"mentioning

confidence: 99%

Recent Advances in Computational Human Phantom for Monte Carlo Dose Calculation

Kim

Jeong

Yeom

2012

Progress in Nuclear Science and Technology

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In the present paper, an advanced type of a computational human phantom called PSRK-Man (Polygon Surface Reference Korean-Man) is introduced with its advantages over the traditional voxel phantom. This paper also discusses the computation speed issue of the surface phantom and the implementation of the direct accelerated geometry Monte Carlo (DAGMC) toolkit in Geant4, which makes the computation speed of the surface phantom by 20-30 times. With the computation speed problem solved, the surface phantom can be used in many applications, including medical imaging, accurate charged particle dosimetry, and radiation therapy simulations.MG[YQTFU<"rqn{iqp"uwthceg"rjcpvqo."Oqpvg"Ectnq."FCIOE."Igcpv6" K0"Kpvtqfwevkqp"The computational human phantom (CHP) is a numerical model of a human body that can be used in computer simulations. Hkiwtg" 3 shows a brief history of CHPs. First, simple geometric forms such as spheres, cylinders, or boxes were used to represent the human body. Then, more complicated models, called stylized or mathematical phantom, were developed to represent the human body 1) . Then, finally, since 1984, people started to use the voxel phantoms 1) . The voxel phantoms are developed using tomography images of human bodies, like CT or MRI, and therefore these describe the human bodies much more realistically than a stylized phantom.The voxel phantoms, however, have some limitations. First, the voxel phantoms are not deformable and therefore it is very difficult, if not possible, to modify the posture of the phantom or the shape of the organs in the phantoms. The *Corresponding Author, E-mail:chkim@hanyang.ac.kr voxel phantoms also show stair-stepped surfaces and it is not suitable for medical imaging simulation because these steps will appear on simulated images which do not really exist on real images. It is also very difficult to model very thin or complicated structures such as oral mucosa, skin, eye balls, and internal ears.On the other hand, a surface phantom, a polygon-mesh phantom or a NURBS phantom, does not have the aforementioned problems. Indeed, a surface phantom is freely deformable and therefore the shape of the phantom or internal organs can be easily changed. Four-dimensional (4D) Monte Carlo simulation is feasible; that is, we can transport the (radiation) particles during the movement of the organs in a patient due to cardiac or respiratory actions, or during the movement of a radiation worker in a radiation field. The surface phantom can easily model very thin structures such as oral mucosa and skin, which are ARTICLE

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Construction of a High-quality Voxel Model VKH-Man Using Serially Sectioned Images from Visible Korean Human Project in Korea

Cited by 6 publications

References 9 publications

Plan-Class Specific Reference Quality Assurance for Volumetric Modulated Arc Therapy

Plan-Class Specific Reference Quality Assurance for Volumetric Modulated Arc Therapy

Chinese human voxel models for evaluation of EMF exposure purpose: in development

Recent Advances in Computational Human Phantom for Monte Carlo Dose Calculation

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