Laser-Tissue Heating Model Modernization Assessment

Abstract

Contemporary methods used to model laser-tissue interactions most commonly employ Pennes bioheat equation. Despite its successful implementation in many applications, Pennes equation reflects some unrealistic assumptions, such as the condition of infinite thermal propagation speed. While in many applications the effect of this assumption may be negligible, evidence shows that this assumption may produce unrealistic temperature profiles in extreme cases (such as laser heating applications) depending on the complexity of the tissue structure. This report aims to introduce and discuss the advantages and disadvantages of alternate models to correct these assumptions. A detailed overview of modern alternatives to Pennes equation, including a numerical comparison between a thermal relaxation time method, the classical Pennes bioheat equation, and a fractional Pennes equation, is provided.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2023
Accession Number
AD1214474

Entities

People

  • Andrew. W. Wharmby
  • Elharith M. Ahmed
  • Sara Botelho-andrade

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Blood Flow
  • Blood Vessels
  • Body Temperature
  • Cardiovascular Physiological Phenomena
  • Cardiovascular System
  • Computational Science
  • Differential Equations
  • Energy
  • Energy Storage
  • Energy Transfer
  • Heat Energy
  • Heat Transfer
  • Mechanical Properties
  • Mechanics
  • Microvessels
  • Military Research
  • Subcutaneous Tissue
  • Thermal Conductivity
  • Thermal Properties
  • Thermodynamics
  • Two Dimensional
  • United States Government

Readers

  • Calculus or Mathematical Analysis
  • Medical Imaging.
  • Theoretical Analysis.

Technology Areas

  • Directed Energy