ASSESSMENT OF PCXMC MONTE CARLO SIMULATIONS IN SLOT-SCANNING-BASED EXAMINATIONS: COMPARISON WITH IN-PHANTOM THERMOLUMINESCENT DOSIMETRY

• Autor: Piai, A ; Loria, A ; Tiberio, P ; Magnino, S ; Campoleoni, M ; Sconfienza, L M ; del Vecchio, A
• Assuntos: Adolescent ; Adult ; Child ; Computer Simulation ; Humans ; Monte Carlo Method ; Phantoms, Imaging ; Radiation Dosage ; Radiometry ; Software ; Thermoluminescent Dosimetry
• É parte de: Radiation protection dosimetry, 2023-03, Vol.199 (3), p.277-289
• Notas: ObjectType-Article-1
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• Descrição: Abstract Slot-scanning technology is nowadays a valid solution for the follow-up of chronic musculoskeletal disorders on children and adolescent patients, but there is no commercial software designed for simulating this X-ray beam geometry. PC Program for X-ray Monte Carlo (PCXMC) is a widespread Monte Carlo software developed for dose computation in projection radiography. In this study, experimental measurements were performed to evaluate its applicability in examinations with a slit-beam device. Physical phantoms corresponding to an adult and a 5-y-old child with calibrated thermoluminescent dosemeters were used for experiments. Different simulation approaches were investigated. Differences between measured and calculated organ doses ranged from −95 to 67% and were statistically significant for almost all organs. For both patients, PCXMC underestimated the effective dose of about 25%. This study suggests that PCXMC is not suited for organ dose evaluation in examinations with slot-scanning devices. It is still a useful tool for effective dose estimation when a proper correction factor is applied.
  
• Editor: England: Oxford University Press
  
• Idioma: Inglês