Τίτλος:
Radiation risk assessment in neonatal radiographic examinations of the chest and abdomen: A clinical and Monte Carlo dosimetry study
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Seeking to assess the radiation risk associated with radiological examinations in neonatal intensive care units, thermo-luminescence dosimetry was used for the measurement of entrance surface dose (ESD) in 44 AP chest and 28 AP combined chest-abdominal exposures of a sample of 60 neonates. The mean values of ESD were found to be equal to 44 ± 16 μGy and 43 ± 19 μGy, respectively. The MCNP-4C2 code with a mathematical phantom simulating a neonate and appropriate x-ray energy spectra were employed for the simulation of the AP chest and AP combined chest-abdominal exposures. Equivalent organ dose per unit ESD and energy imparted per unit ESD calculations are presented in tabular form. Combined with ESD measurements, these calculations yield an effective dose of 10.2 ± 3.7 μSv, regardless of sex, and an imparted energy of 18.5 ± 6.7 μJ for the chest radiograph. The corresponding results for the combined chest-abdominal examination are 14.7 ± 7.6 μSv (males)/17.2 ± 7.6 μSv (females) and 29.7 ± 13.2 μJ. The calculated total risk per radiograph was low, ranging between 1.7 and 2.9 per million neonates, per film, and being slightly higher for females. Results of this study are in good agreement with previous studies, especially in view of the diversity met in the calculation methods. © 2006 IOP Publishing Ltd.
Συγγραφείς:
Makri, T.
Yakoumakis, E.
Papadopoulou, D.
Gialousis, G.
Theodoropoulos, V.
Sandilos, P.
Georgiou, E.
Περιοδικό:
Physics in Medicine and Biology
Λέξεις-κλειδιά:
Entrance surface dose (ESD); Mathematical phantoms; Neonatal radiographic examinations; Neonates, Biological organs; Dosimeters; Intensive care units; Mathematical models; Neonatal monitoring; Risk assessment; Spectrum analysis; Thermoluminescence, Radiography, abdominal radiography; article; dosimetry; female; human; major clinical study; male; mathematical analysis; Monte Carlo method; newborn; newborn intensive care; priority journal; radiation dose; radiation exposure; radiation hazard; radiodiagnosis; risk assessment; thermoluminescence dosimetry; thorax radiography; X ray analysis, Abdominal Cavity; Female; Humans; Infant, Newborn; Male; Models, Theoretical; Monte Carlo Method; Radiation Dosage; Radiation Monitoring; Radiography, Abdominal; Radiography, Thoracic; Radiometry; Risk; Risk Assessment; Stochastic Processes; Thorax
DOI:
10.1088/0031-9155/51/19/019
