Related Experiment Videos
Optical phantom materials for near infrared laser photocoagulation studies
M N Iizuka1, M D Sherar, I A Vitkin
1Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada.
Lasers in Surgery and Medicine
|August 24, 1999
Summary
Researchers developed novel phantoms simulating dynamic and static tissue optical properties for laser irradiation studies. These tissue phantoms enable better understanding of opto-thermal effects.
Area of Science:
- Biomedical Optics
- Tissue Optics
- Laser-Tissue Interactions
Background:
- Developing accurate tissue phantoms is crucial for studying laser-tissue interactions.
- Simulating dynamic and static optical properties of tissue presents a significant challenge.
Purpose of the Study:
- To create phantoms that mimic the optical properties of biological tissues.
- To enable the study of laser irradiation effects on simulated tissue.
Main Methods:
- A heat-sensitive phantom was created using albumen, agar, and Naphthol Green dye.
- A static phantom was developed using polyacrylamide, Naphthol Green, and Intralipid-10%.
- Optical properties (absorption and scattering coefficients) were measured using the added absorber technique.
Main Results:
- Phantoms exhibited absorption coefficients of 0.50 cm⁻¹ and reduced scattering coefficients of 2.67 cm⁻¹ in their native state at 805 nm.
- Upon coagulation, absorption increased to 0.7 cm⁻¹ and scattering to 13.1 cm⁻¹.
- The developed phantoms successfully simulated key optical properties of tissue.
Conclusions:
- Two types of phantoms, with dynamic and static optical properties, were successfully developed.
- These phantoms closely replicate the optical characteristics of biological tissues.
- The phantoms are suitable for future investigations into opto-thermal effects in tissues.