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Optical properties of multicellular tumour spheroids
P Hargrave1, P W Nicholson, D T Delpy
1Department of Oncology, University College, London, UK.
Physics in Medicine and Biology
|June 1, 1996
Summary
Multicellular tumor spheroids, used in cancer research, exhibit distinct optical properties. These findings aid in understanding tumor tissue optics for improved diagnostics and therapies.
Area of Science:
- Biomedical Optics
- Cancer Research
- In Vitro Models
Background:
- Multicellular tumor spheroids (MTS) are established in vitro models mimicking solid tumors.
- Understanding tumor optical properties is crucial for developing advanced diagnostic and therapeutic strategies.
- Previous research has explored optical characteristics of excised tumor tissues.
Purpose of the Study:
- To investigate the optical properties (scattering and absorption coefficients, g-value) of MTS.
- To compare optical properties of fresh and fixed MTS.
- To relate MTS optical data to excised tumor tissue properties.
Main Methods:
- In vitro culture of multicellular tumor spheroids.
- Optical measurements in the 600-1000 nm wavelength range.
- Determination of scattering coefficients, absorption coefficients, and g-values for fresh and fixed spheroids.
Main Results:
- Fresh MTS exhibited scattering coefficients of 160-90 mm⁻¹, absorption coefficients of 0.1-0.4 mm⁻¹, and g-values of 0.99.
- Fixation significantly altered scattering and absorption coefficients.
- Measured optical properties were compared with those of excised human tumor tissues.
Conclusions:
- MTS possess distinct optical properties relevant to tumor tissue.
- Optical measurements on MTS provide insights into light-matter interactions in tumors.
- These findings support the use of MTS as models for optical studies in oncology.