Stochastic parametric skeletal dosimetry model for humans: Anatomical-morphological basis and parameter evaluation.

Area of Science:

• Medical physics and dosimetry
• Radiation biology
• Skeletal anatomy and morphology

Background:

• Radiation exposure to bone marrow above 100 mGy elevates leukemia risk.
• Epidemiological studies in contaminated areas show increased leukemia risk.
• Accurate dosimetry is crucial for understanding radiation-induced leukemia.

Purpose of the Study:

• To present the anatomical and morphological foundations of the Stochastic Parametric Skeletal Dosimetry (SPSD) model.
• To detail the parameters of trabecular bone microstructure in hematopoietic skeletal regions.
• To describe the segmentation of hematopoietic areas into simple bone segments.

Main Methods:

• Developed an original stochastic bone dosimetry modeling methodology (SPSD model).
• Collected and analyzed data from scientific literature (articles, atlases, monographs).
• Assessed parameters of bone microstructure, dimensions, and age-related changes.

Main Results:

• Established an anatomical-morphological basis for the SPSD model using published data.
• The SPSD model incorporates data for various age groups (newborns to adults) and includes sex differences.
• The model comprises 289 bone segments, each with multiple microstructural and dimensional parameters, with population variability estimated.

Conclusions:

• The SPSD model provides a detailed anatomical and morphological framework for bone marrow dosimetry.
• The model's approach using simple geometric shapes was validated against independent datasets.
• This work supports more accurate dosimetric assessments for epidemiological studies of radiation exposure.