Cumulative radiation effect. Part VI: simple nomographic and tabular methods for the solution of practical problems

Area of Science:

• Radiation Oncology
• Medical Physics
• Radiobiology

Background:

• The Cumulative Radiation Effect (CRE) quantifies sub-tolerance radiation damage in normal connective tissue.
• Previous methods for CRE evaluation were complex and time-consuming for intricate radiation therapy schedules.
• A unified scale assesses biological effects from fractionated or continuous radiation therapy.

Purpose of the Study:

• To present simplified nomographic and tabular methods for practical CRE problem-solving.
• To introduce nomenclature for concise description of radiation therapy schedules and regimes.
• To derive algebraic equations for CRE calculation in multi-schedule regimes.

Main Methods:

• Development of simple nomographic and tabular calculation tools.
• Introduction of concise nomenclature for radiation therapy schedules.
• Derivation of algebraic equations for CRE assessment in complex regimes.
• Simplification of calculations to basic arithmetic operations.

Main Results:

• Nomographic and tabular methods significantly simplify CRE calculations.
• Algebraic equations allow independent evaluation of CRE for constituent schedules.
• Complex radiation therapy problems can be solved efficiently using these simplified methods.
• An evaluation procedure sheet summarizes the calculation process.

Conclusions:

• The presented methods offer a practical and efficient approach to calculating the Cumulative Radiation Effect.
• These tools reduce the mathematical complexity, enabling hand calculations or slide rule use.
• The simplified CRE system facilitates accurate assessment of radiation effects in clinical practice.