Pterygium is a benign conjunctival neoformation usually treated by surgical excision, but
recurrences may affect 30% to 89% of cases, so that adjunctive therapies like conjunctival …

Over the past 35 years, the Calibration Laboratory of IPEN (LCI) has seen significant
advancements in the development of ionization chambers. This paper highlights the key …

This paper aims to show how the variance reduction technique “Geometry splitting/Russian
roulette” improves the statistical error and reduces uncertainties in the determination of the …

A parallel-plate ionization chamber (PPC) with a nominal volume of 8.16 cm³ was developed
based on theoretically simulated design parameters. Its purpose is to serve as a transfer …

An extrapolation minichamber was developed for measuring doses from weakly penetrating
types of radiation. The chamber was tested at the radiotherapeutic dose level in a beam from …

Beta therapy is employed in post surgery to treat lesions such as pterygia, keloid and
glioblastoma. The beta source most used for these purposes is 90/90 Y, whose quality …

An extrapolation chamber of type Böhm 23392, used for the dosimetry of RQR beam
qualities at the Secondary Standard Dosimetry Laboratory of King Faisal Specialist Hospital …

Extrapolation chamber is a special parallel-plate ionization chamber, particularly suggested
for low penetrating radiations. Its sensitive volume is varied through a change of the inter …

Extrapolation chambers are instruments designed to measure doses of low-energy
radiations, mainly beta radiation. In this work, a commercial extrapolation chamber and a …

Purpose: Obtaining the reference dose rate for a radioactive applicator consisting of a plate
as a 32P absorber, a steel window and a steel capsule. Methods: Relative dosimetry and …