Abstract
In neurosurgery such as the treatment of glioma, it is important to remove the tumor precisely and accurately, which can be achieved with a micro laser with a wavelength of 2.8 µm. It is necessary, however, to maintain a constant distance from the brain surface. We developed an automatic focusing system for the micro laser ablation system. This system is using a triangulation method with a guide laser and a small CCD camera. The guide laser spot was attenuated and penetrates the biomedical tissue according to its scattering and absorption features. Therefore, each measurement parameter such as the luminance threshold in the image processing was necessary to be appropriately controlled. In this research, we proposed the focusing method to appropriately control the luminance threshold. We confirmed that this method works effectively on biomedical tissue. In the future, we will carry out a combination test with the micro laser system and achieve a precise operation system for brain tumors.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
T Maruyama, et al (2001) Intraoperative detection of malignant gliomas using 5-Aminolevulinic acid induced protoporphyrin fluorescence, openMRI and real-time navigation system. Computer Assisted Radiology and Surgery 15:270–275
K Shimizu, et al (2003) Application of blue semiconductor laser to measurement of 5-ALA induced fluorescence for intraoperative detection of brain tumor. Proceedings of 6th Japan-France Congress on Mechatronics and 4th Asia-Europe Congress on Mechatronics, pp 135–140
S Omori, Y Muragaki, I Sakuma, H Iseki (2004) Robotic laser surgery with λ = 2.8um microlaser in neurosurgery. Journal of Robotics and Mechatronics 16:122–128
S Omori, R Nakamura, Y Muragaki, H Iseki, K Takakura (2004) Improvement study of computer controlled mid-infrared laser system for neuro-surgery. Proceedings of 13th conference of Japan Society of Computer Aided Surgery, pp 37–38
M Noguchi, et. al (2004) Development of a Compact Automatic-Focusing System for a Neurosurgical Laser Instrument. Journal of Japan Society of Computer Aided Surgery 6:483–489
Sterenborg HJ, et al (1989) The spectral dependence of the optical properties of the human brain. Lasers Med Sci 4:221–227
J van Staveren, J M. Moes, J van Marie, A Prahl, J C van Germert (1991) Light scattering in Intralipid-10% in the wavelength range of 400–1100 nm. Appl Opt 30:4507–4514
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer
About this chapter
Cite this chapter
Noguchi, M. et al. (2007). Development of a Compact Automatic Focusing System for a Neurosurgical Laser Instrument. In: Wu, J.L., Ito, K., Tobimatsu, S., Nishida, T., Fukuyama, H. (eds) Complex Medical Engineering. Springer, Tokyo. https://doi.org/10.1007/978-4-431-30962-8_6
Download citation
DOI: https://doi.org/10.1007/978-4-431-30962-8_6
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-30961-1
Online ISBN: 978-4-431-30962-8
eBook Packages: EngineeringEngineering (R0)