Dosimetry of ionising radiation is a well-established and mature branch of physical sciences
with many applications in medicine and biology. In particular radiotherapy relies on …

Small‐field dosimetry used in advance treatment technologies poses challenges due to loss
of lateral charged particle equilibrium (LCPE), occlusion of the primary photon source, and …

Small fields (few cm and below) are being applied in therapy independently or as mm/sub-
cm segments of larger fields. Included are intensity modulated radiotherapy …

Purpose: To explain the reasons for significant quality correction factors in megavoltage
small photon fields and clarify the underlying concepts relevant to dosimetry under such …

Purpose: To quantify detector perturbation effects in megavoltage small photon fields and
support the theoretical explanation on the nature of quality correction factors in these …

Purpose: Small field x‐ray beam dosimetry is difficult due to lack of lateral electronic
equilibrium, source occlusion, high dose gradients, and detector volume averaging …

Despite the emergence of sophisticated technologies in treatment planning and
administration, routine determination of delivered radiation doses remains a challenge due …

Purpose: Accurate dosimetry of small fields remains a challenge to the clinical physicist.
Choosing the appropriate detector and determination of factors continue to be an area of …

Purpose The equivalent square (ES) concept has been used for traditional radiation fields
defined by the machine collimating system. For small fields, the concept Sclin was …

Purpose Dosimetric accuracy is critical when switching a patient treated with stereotactic
body radiation therapy (SBRT) or stereotactic fractionated radiotherapy (SRT) among beam …