• Title, Summary, Keyword: 연속 인체절단 영상

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Representation of Serially Sectioned Images of Entire Human Body by Improvement of Notch Filter (놋치 필터 개선을 통한 인체 연속절단 영상 재현)

  • Park, Ki-Seok;Har, Dong-Hwan
    • The Journal of the Korea Contents Association
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    • v.11 no.5
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    • pp.15-24
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    • 2011
  • Recently various anatomic researches by using serially sectioned images in VK(Visible Korean) project are in progress. In that sense, it is very important and necessary to represent images which keep information of the original anatomic images. In this regard, there are some studies to get rid of slice patterns in coronal and sagittal images. However, according to the rapid spatial frequency changes, the ringing effect occurred in common. In addition, because of merge with the original images which have splice patterns, those patterns appeared again. Therefore, in this study we found effective color space to apply to FFT(Fast Fourier Transform) and notch filter in getting rid of the slice patterns. To verify this, we used RGB, LAB, CMYK, HSV and HSL color space. Secondly we got rid of and alleviated the ringing effect by improving notch filter. To verify this, we compared proposed method with previous study on the basis of original images by visual method and objective values. These result images are expected to contribute to anatomy research in relation to VK project.

Production and Usage of Korean Human Information in KISTI (KISTI에 있어서 한국인 인체정보의 생산과 활용)

  • Lee, Sang-Ho;Lee, Seung-Bock
    • The Journal of the Korea Contents Association
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    • v.10 no.5
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    • pp.416-421
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    • 2010
  • The KISTI (Korea Institute of Science and Technology Information) began to produce the Korean human information called Visible Korean and Digital Korean since 2000 because there was no human information in Korea which could represent the physical characteristics of Korean human body. The Visible Korean consists of CT, MR, sectioned and segmented images of Korean human body. We obtained the serially sectioned images by grinding the Korean cadaver in horizontal direction and segmented these images by outlining the inner organs of human. We have produced the sectioned images of Korean male whole body, male head, and female pelvis in2008. The segmentation and 3D reconstruction of these images are now in proceeding. The Digital Korean consists of CT images of about 100 Korean cadavers. These CT images were segmented by individual bone, reconstructed to produce the 3D bone models and the skin surface model was also added. The mechanical properties of individual bones were obtained by measuring the property of individual bone sample. We have distributed these Korean human informations to users in domestic and abroad. About 70 institutes in domestic, and 20 institutes in abroad have used our data in research use and nearly 160 proceedings and articles were published since 2001. We think these human informations have a role of medical information infrastructure that could be used in the field of medical education, biomechanics, virtual reality etc.

A Study on survey of practical applications with the medical image data: Visible Korean Human and Digital Korean (한국인의 인체 영상 데이터에 대한 활용 사례 연구)

  • Kim, dae-jung;Ahn, sung-soo;Park, hyung-seon;Lee, Seung-bock
    • Proceedings of the Korea Contents Association Conference
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    • pp.401-404
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    • 2007
  • Recently, researches on human modeling and visualization are being done in medical, educational field and clinical treatment. As human configurations, however, are different among races and ethnic people, it is necessary to construct standard Korean human model according to Korean standard configuration, age, and sex etc. KISTI started building the Visible Korean Human Database in 2000 and it has provided the Digital Korean Database built in 2003 for users in university, research institute. As the utilization of the Human Data was insignificant and the majority fields that used the data were in research, we investigate application of data, other utilization method, and current research status to further and boost use of the Human data in many other fields.

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Development of a Korean Adult Female Voxel Phantom, VKH-Woman, Based on Serially Sectioned Color Slice Images (고해상도 연속절단면 컬러해부영상을 이용한 한국인 성인여성 복셀팬텀 VKH-Woman 개발)

  • Jeong, Jong Hwi;Yeom, Yoen Soo;Han, Min Cheol;Kim, Chan Hyeong;Ham, Bo Kyoung;Hwang, Sung Bae;Kim, Seong Hoon;Lee, Dong-Myung
    • Progress in Medical Physics
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    • v.23 no.3
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    • pp.199-208
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    • 2012
  • The computational human phantom including major radiation sensitive organs at risk (OARs) can be used in the field of radiotherapy, such as the variation of secondary cancer risks caused by the radiation therapy and the effective dose evaluation in diagnostic radiology. The present study developed a Korean adult female voxel phantom, VKH-Woman, based on serially sectioned color slice images of Korean female cadaver. The height and weight of the developed female voxel phantom are 160 cm and 52.72 kg, respectively that are virtually close to those of reference Korean female (161 cm and 54 kg). The female phantom consists of a total of 39 organs, including 27 organs recommended in the ICRP 103 publication for the effective dose calculations. The female phantom composes of $261{\times}109{\times}825$ voxels (=23,470,425 voxels) and the voxel resolution is $1.976{\times}1.976{\times}2.0619mm^3$ in the x, y, and z directions. The VHK-Woman is provided as both ASCII and Binary data formats to be conveniently implemented in Monte Carlo codes.

Deformation of the Reference Korean Voxel Model and Its Effect on Dose Calculation (표준한국인 체적소 모델 HDRK-Man의 외형 보정 및 선량 산출에 미치는 영향 평가)

  • Jeong, Jong-Hwi;Cho, Sung-Koo;Cho, Kun-Woo;Kim, Chan-Hyeong
    • Journal of Radiation Protection and Research
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    • v.33 no.4
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    • pp.167-172
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    • 2008
  • Recently a high-quality voxel model of a Korean adult male was constructed at Hanyang University by using very high resolution serially-sectioned anatomical images of a cadaver, which was provided by the Korean Institute of Science and Technology Information (KISTI). Most existing voxel phantoms are developed based on an individual in the supine posture. This study converted the HDRK-Man voxel model into surface model and adjusted the flattened back of the HDRK-Man to a normal shape in the upright posture using 3D graphic softwares such as $3D-DOCTOR^{TM}$, $Rapidform^{(R)}$2006, $Rhinoceros^{(R)}$4.0, $MAYA^{(R)}$8.5. The effective doses of adjusted model were compared with those of unadjusted model for some standard irradiation geometries (i.e., AP, PA, LLAT, RLAT). In general, the differences were not very large and, among those, the largest difference was found for the PA radiation geometry, as expected. These methodologies can be used for the development of various deformed posture models of HDRK-Man in the later stage of this project.

Development of the Reference Korean Female Voxel Phantom (한국인 기준여성 체적소형 모의체 개발)

  • Ham, Bo-Kyoung;Cho, Kun-Woo;Yeom, Yoen-Soo;Jeong, Jong-Hwi;Kim, Chan-Hyeong;Han, Min-Cheol
    • Journal of Radiation Protection and Research
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    • v.37 no.1
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    • pp.41-49
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    • 2012
  • The objective of this study is for development of the reference Korean female phantom, HDRK-Woman. The phantom was constructed by adjusting a Korean woman voxel phantom to the Reference Korean data. The Korean woman phantom had been developed based on the high-resolution color slice images obtained from an adult Korean female cadaver. There were a total of 39 organs including the 27 organs specified in ICRP 103 for effective dose calculation. The voxel resolution of the phantom was $1.976{\times}1.976{\times}2.0619\;mm^3$ and the voxel array size is $261{\times}109{\times}825$ in the x, y and z directions. Then, the voxel resolution was changed to $2.0351{\times}2.0351{\times}2.0747\;mm^3$ for adjustment of the height and total bone mass of the phantom to the Reference Korean data. Finally, the internal organs and tissue were adjusted using in-house software program developed for 3D volume adjustment of the organs and tissue. The effective dose values of HDRK phantoms were calculated for broad parallel photon beams using MCNPX Monte Carlo code and compared with those of ICRP phantoms.