The Journal of Korean Institute of Information Technology (한국정보기술학회논문지)

Korean Institute of Information Technology (한국정보기술학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on PWM Control of Near-Infrared Fluorescence Imaging System

근적외선 형광 영상시스템의 PWM 제어에 관한 연구

  • 이병호 (조선대학교 소프트웨어융합공학과) ;
  • 반성범 (조선대학교 전자공학과)
  • Received : 2018.04.17
  • Accepted : 2018.07.05
  • Published : 2018.11.30
⟨ Previous Next ⟩

Abstract

Fluorescent images using near-infrared light have no worry about radioactivity, and images can be checked in real time during surgery. Therefore experiments using fluorescent images for monitoring lymph node biopsy are actively under way. Fluorescent imaging equipment uses high heat-generating components such as LED and camera, thus uses water-cooling system as a stable heating suppression means. However in the fluorescent image equipment, the water cooling system takes a large volume which is a disadvantage in terms of miniaturization of the equipment. Even if the air cooling system is used for miniaturizing the equipment, heat generation is a problem. In this paper, we have experimented with the air cooling method using PWM control for the miniaturization of the equipment, and confirmed the constant quality of the fluorescent image and the suppression of the heat generation without any problems even when the equipment is used for a long time.

근적외선을 이용한 형광 영상은 방사능에 대한 걱정이 없고 수술 중 실시간으로 영상 확인이 가능한 장점이 있다. 따라서 감시림프절 생검에 형광 영상을 이용하는 실험이 활발히 진행되고 있다. 형광 영상장비는 LED, 카메라와 같은 고발열 부품이 사용되어 안정적인 발열 억제 수단으로 수랭 방식의 쿨링 시스템을 사용하고 있다. 형광 영상장비에서 수랭 쿨링 시스템은 큰 부피를 차지하여 장비의 소형화 측면에서는 단점이 된다. 장비의 소형화를 위해 공랭 쿨링 방식을 이용할 경우 발열이 문제가 된다. 본 논문에서는 장비의 소형화를 위해 PWM 제어를 이용한 공랭 방식을 적용하여 실험을 했고, 장비를 장시간 사용해도 문제가 없는 일정한 품질의 형광 영상과 발열 억제 성능을 확인했다.

Keywords

Acknowledgement

Supported by : 조선대학교

References

  1. A. V. DSouza, H. Lin, E. R. Henderson, K. S. Samkoe and B. W. Pogue, "Review of Fluorescence Guided Surgery Systems: Identification of Key Performance", Journal of Biomedical Optics, Vol. 21, No. 8, pp. 080901, Aug. 2016. https://doi.org/10.1117/1.JBO.21.8.080901
  2. Z. Chen, N. Zhu, S. Pacheco, X. Wang, and R. Liang, "Single Camera Imaging System for Color and Near-infrared Fluorescence Image Guided Surgery", Biomedical Optics Express, Vol. 5, No. 8, pp. 2791-2797, Aug. 2014. https://doi.org/10.1364/BOE.5.002791
  3. C. Chi, Y. Du, J. Ye, D. Kou, J. Qiu, J. Wang, J. Tian, and X. Chen, "Intraoperative Imaging Guided Cancer Surgery from Current Fluorescence Molecular Imaging Methods to Future Multi Modality Imaging Technology", Theranostics, Vol. 4, No. 11, pp. 1072-1084, Aug. 2014. https://doi.org/10.7150/thno.9899
  4. M. V. Marshall, J. C. Rasmussen, I. C. Tan, and M. B. Aldrich, "Near-Infrared Fluorescence Imaging in Humans with Indocyanine Green: A Review and Update", Open Surg Oncol J., Vol. 2, No. 2, pp. 12-25, Jan. 2010. https://doi.org/10.2174/1876504101002020012
  5. B. Zhu and E. M. Sevick-Muraca, "A Review of Performance of Near-Infrared Fluorescence Imaging Devices Used in Clinical Studies", The Authors. Published by the British Institute of Radiology, Vol. 88, No. 1045, pp. 1-26, Jan. 2015.
  6. B. E. Schaafsma, J. S. D. Mieog, M. Hutteman, and van der Vorst, "The Clinical Use of Indocyanine Green as a Near-Infrared Fluorescent Contrast Agent for Image-Guided Oncologic Surgery", Journal of Surgical Oncology, Vol. 104, No. 3, pp. 323-332, Apr. 2011. https://doi.org/10.1002/jso.21943
  7. S. Keereweer, T. J. A. Snoeks, and J. D. F. Kerrebijn, "Optical Image-Guided Cancer Surgery: Challenges and Limitations", American Association for Cancer Research, Vol. 19, No. 14, pp. 3745-3754, May 2013.
  8. K. H. Um, "Design of a PWM-Controlled Driving Device for Backlights of LED Systems", The Journal of The Institute of Internet, Broadcasting and Communication(JIIBC), Vol. 15, No. 1, pp. 245-251, Feb. 2015. https://doi.org/10.7236/JIIBC.2015.15.1.245
  9. H. J. Kim, E. Y. Kang, S. B. Im, G. C. Hoang and Y. K. Kim, "A Comparative Analysis of Thermal Properties of COB LED based on ThermoelectricDevice Structure", The Journal of The Institute of Internet, Broadcasting and Communication(JIIBC), Vol. 15, NO. 2, pp. 189-194, Apr. 2015. https://doi.org/10.7236/JIIBC.2015.15.2.189