Relative Dosimetry in Radiation Therapy

Seng Boh Lim; Sonja Wegener; Raj Mitra; Ching Ling Teng

doi:10.1007/978-3-032-10159-4_13

Relative Dosimetry in Radiation Therapy

Seng Boh Lim
, Sonja Wegener
, Raj Mitra
, Ching Ling Teng

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

This chapter discusses the principles, techniques, and equipment used in relative dosimetry for radiation therapy, summarizing various detector types while emphasizing their roles, limitations, and selection criteria based on field size, beam energy, and scanning requirements. Key applications include the collimator scatter factor (Sc), total scatter factor (St), percent depth dose (PDD), beam profiles, and tissue-phantom ratios (TPR/TMR). The chapter highlights the importance of accurate data acquisition for small fields ('3 × 3 cm²) due to challenges such as the loss of lateral charged particle equilibrium and detector volume averaging. Special considerations are given for advanced machines like MR-LINACs, RefleXion, Halcyon, and Gamma Knife, as each presents unique constraints that require tailored setup and measurement strategies.

Original language	English
Title of host publication	Radiation Detectors and Methods in Medicine
Subtitle of host publication	Therapy, Diagnostic and Radiation Protection
Publisher	Springer Nature
Pages	205-225
Number of pages	21
ISBN (Electronic)	9783032101594
ISBN (Print)	9783032101587
DOIs	https://doi.org/10.1007/978-3-032-10159-4_13
State	Published - 1 Jan 2026
Externally published	Yes

Keywords

Beam profile
ESPRIT
ETHOS
Halcyon
Output factor
Percent depth dose
RefleXion
Relative dosimetry

Access to Document

10.1007/978-3-032-10159-4_13

Cite this

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AU - Lim, Seng Boh

AU - Wegener, Sonja

AU - Mitra, Raj

AU - Teng, Ching Ling

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KW - ESPRIT

KW - ETHOS

KW - Halcyon

KW - Output factor

KW - Percent depth dose

KW - RefleXion

KW - Relative dosimetry

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BT - Radiation Detectors and Methods in Medicine

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Relative Dosimetry in Radiation Therapy

Abstract

Keywords

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