Results 81 to 90 of about 8,576 (208)

Methodology study for determining the half-value layer using the Monte Carlo code PHITS

Brazilian Journal of Radiation Sciences
For most purposes, the quality of a beam can be specified in terms of the half-value layer (HVL), which is the thickness of material required to reduce the air kerma  to half, at one meter from the source, from a unidirectional beam of infinitesimal ...
Ronald Soares, Marco Aurélio Lacerda
doaj   +1 more source

Safety and Efficacy of Pulsed Field Ablation for Atrial Fibrillation in Older Patients: An Observational Study at a Large Tertiary Centre in Australia

Journal of Arrhythmia, Volume 42, Issue 2, April 2026.
In this retrospective observational study, pulsed field ablation using a specific pentaspline catheter showed comparable procedural and clinical outcomes between older (aged ≥ 75 years) and younger patients (aged < 75 years). However, judicious patient selection is still warranted and randomized trial data are needed to confirm these findings. ABSTRACT
Francis J. Ha, Duron Prinsloo, Hui Chen Han, Nitesh Nerlekar, Adam J. Brown, Emily Kotschet   +5 more
wiley   +1 more source

Radiation Dose during Digital Subtraction Angiography of the Brain—The Influence of Examination Parameters and Patient Factors on the Dose

Brain Sciences
Cerebral vascular angiography, or digital subtraction angiography (DSA), is essential for diagnosing neurological conditions but poses radiation risks.
Sandra Modlińska, Jakub Kufel, Michał Janik, Łukasz Czogalik, Piotr Dudek, Marcin Rojek, Miłosz Zbroszczyk   +6 more
doaj   +1 more source

Radiation dose estimation of patients undergoing lumbar spine radiography

Journal of Medical Physics, 2013
Radiation dose to organs of 100 adult patients undergoing lumbar spine (LS) radiography at a University Hospital have been assessed. Free in air kerma measurement using an ionization chamber was used for the patient dosimetry. Organ and effective dose to
Prince Kwabena Gyekye, Adu Simon, Emi-Reynolds Geoffrey, Yeboah Johnson, Inkoom Stephen, Cynthia Kaikor Engmann, Wotorchi-Gordon Samuel   +6 more
doaj   +1 more source

A simple analytical method for heterogeneity corrections in low dose rate prostate brachytherapy [PDF]

, 2015
In low energy brachytherapy, the presence of tissue heterogeneities contributes significantly to the discrepancies observed between treatment plan and delivered dose.
Afsharpour H, Afsharpour H, Cullen D, Cullen D, Facundo Ballester, Fernando Hueso-González, Frank-André Siebert, Hubbell J H, Javier Vijande, Jose Perez-Calatayud, Kinsey R R, Salvat F, Ye S   +12 more
core   +1 more source

A comparison of measured and calculated values of air kerma rates from 137Cs in soil

Радиационная гигиена, 2016
In 2010, a study was conducted to determine the air gamma dose rate from 137Cs deposited in soil. The gamma dose rate measurements and soil sampling were performed at 30 reference plots from the south-west districts of the Bryansk region (Russia) that ...
V. P. Ramzaev, V. Yu. Golikov
doaj  

Comparison of the hypothetical 57 Co brachytherapy source with the 192 Ir source

Contemporary Oncology, 2016
Aim of the study : The 57 Co radioisotope has recently been proposed as a hypothetical brachytherapy source due to its high specific activity, appropriate half-life (272 days) and medium energy photons (114.17 keV on average).
Mohammad Taghi Bahreyni Toossi, Mahdi Ghorbani, Atefeh Rostami, Mohsen Khosroabadi, Sara Khademi, Courtney Knaup   +5 more
doaj   +1 more source

Robot‐assisted ultrasound‐guided PCNL: initial experience in 10 consecutive cases

BJU International, Volume 137, Issue 5, Page 788-790, May 2026.
Andrew Amenyogbe, Mitch Humphreys, Jackson Cabo, Karen L. Stern   +3 more
wiley   +1 more source

Production of arsenical bronze using speiss on the Elephantine Island (Aswan, Egypt) during the Middle Kingdom (Middle Bronze Age) (c.2000–1650 BCE)

Archaeometry, Volume 68, Issue S1, Page S38-S63, April 2026.
Abstract This paper presents the first direct evidence of the slags produced during the cementation alloying process of Cu with speiss inside ceramic crucibles, thus representing Cu alloying with As in Middle Kingdom Egypt. The settlement deposits from the Middle Bronze Age were excavated on Elephantine Island, within modern Aswan.
Jiří Kmošek, Martin Odler
wiley   +1 more source

The presence and dosimetry of radon and thoron in a historical, underground metalliferous mine [PDF]

, 2018
A combination of long term passive, and short term active radon-222, radon-220 and respective progeny measurements were conducted in both traverse and longitudinal axes of a historical metalliferous underground mine in North Queensland, Australia.
Blevin, BOM, Chen, Cogliano, Darby, Dixon, FAA., Gillmore, Gillmore, Gillmore, Gillmore, IAEA., ICRP., ICRP., ICRP., Janik, Khater, Kávási, Lubin, Malins, McLaughlin, Miles, Misdaq, Mudd, Muirhead, Ningappa, Nuccetelli, Omori, Przylibski, Ramola, Solli, Stojanovska, Tokonami, Tschiersch, UNSCEAR., UNSCEAR., Wheeler, WHO., Yamada, Zhuo, Zhuo, Zhuo   +41 more
core   +2 more sources