Dosimetry and Radiobiology of Alpha-Particle Emitting Radionuclides

Author(s): George Sgouros*, Robert Hobbs, Anders Josefsson.

Journal Name: Current Radiopharmaceuticals

Volume 11 , Issue 3 , 2018

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Abstract:

Background: Radiopharmaceutical therapy is a cancer treatment modality by which radiation is delivered directly to targeted tumor cells or to their microenvironment. This makes it possible to deliver highly potent alpha-particle radiation. The short-range and highly potent nature of alpha-particles require a dosimetry methodology that considers microscale distributions of the alpha-emitting agent. The high energy deposition density along an alpha-particle track causes a spectrum of DNA lesions. The majority of these are irreparable DNA double-stranded breaks. Accordingly the biologic effects of alpha- particles are largely impervious to the adaptive and resistance mechanism that renders other therapeutics ineffectual.

Objectives: In this review, the radiobiology and dosimetry of alpha-particle emitting radionuclides as related to their use in radiopharmaceutical therapy, are presented.

Conclusion: Alpha-particle emitter radiopharmaceutical therapy is distinguished from other treatment modalities. Its safe clinical use requires an understanding of its unique dosimetry and radiobiology.

Keywords: Radiopharmaceutical therapy, alpha-particles, treatment planning, DNA damage, relative biological efficacy.

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Article Details

VOLUME: 11
ISSUE: 3
Year: 2018
Page: [209 - 214]
Pages: 6
DOI: 10.2174/1874471011666180426130058
Price: $65

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