Ice-Front Propagation Monitoring in Tissue by the use of Visible-Light Spectroscopy

Area of Science:

• Biomedical Engineering
• Optical Physics
• Tissue Engineering

Background:

• Cryopreservation and cryosurgery involve freezing biological tissues.
• Accurate monitoring of ice front progression is crucial for these procedures.
• Current methods for ice front detection may have limitations.

Purpose of the Study:

• To demonstrate the feasibility of using visible-light spectroscopy for ice-front detection in freezing tissue.
• To correlate spectroscopic data with magnetic resonance imaging (MRI) for validation.
• To explore potential medical applications in cryopreservation and cryosurgery.

Main Methods:

• Developed an experimental apparatus compatible with MRI.
• Induce one-dimensional freezing in chicken muscle tissue.
• Utilized both reflectance and transillumination spectroscopy configurations.
• Correlated time-evolving transmittance spectra with proton magnetic resonance images.

Main Results:

• Successfully demonstrated that visible-light spectroscopy can track the progression of an ice front in tissue.
• Established a correlation between spectral changes and the ice front's position.
• The experimental setup allowed for controlled, one-dimensional freezing.

Conclusions:

• Visible-light spectroscopy is a viable method for non-invasive ice-front detection in freezing tissues.
• This technique offers potential advancements for cryopreservation and cryosurgery applications.
• Further research can optimize spectroscopic methods for clinical use.