الرئيسية / Uncategorised / Patients effective dose estimation during AP pelvis radiography in some hospitals of Al Najaf city, Iraq

Patients effective dose estimation during AP pelvis radiography in some hospitals of Al Najaf city, Iraq

Hussien Abid Ali Mraity, Hayder Abbas Harees
University of Kufa, Faculty of Science, Dept. of Physics
hussien_zahed@yahoo.com; hussein.mraity@uokufa.edu.iq
Background: Monitoring patients radiation dose during anterior-posterior
(AP) pelvis radiography is of paramount importance. This is due to the
existence of the gonads within the pelvic region.
Objective: The purpose of this work is to estimate effective dose (ED) for
adult patients who examined for AP pelvis radiography in the governmental
hospitals of Al Najaf city-Iraq.
Materials and methods: The ED was estimated for 64 patients (male and
female) who undertaking AP pelvis radiography using CALDOSE-X5 Monte
Carlo software. The calculation of the ED was based on the measurements of
X-ray tube output and the knowledge of exposure factors. The X- ray output
was measured using Rad-Check ionization chamber for each X-ray tube. In
total, seven X-ray tubes were enrolled to assess the patients’ ED. Exposure
factors includes tube potential (kVp), tube loading (mAs) and X-ray source to
image detector distance-SID (cm)); these were recorded for each patient
together with their demographic data (weight(kg) and height(m)). Five major
hospitals were considered in this work (i.e. Al Sadder, Al Hakeem, Al Furat ,
Al Manzrah and Middel Euphrates cancer center).
Results: The average value of the estimated ED was ranged from 0.156±0.041
mSv to 0.4068±0.049 mSv across all hospitals. The value of max/min of the
ED was ranged from 1.25 to 2.58 across different hospitals. The corresponding
average values of the kVp used for this examination was ranged from 75 to
113.75 kVp; mAs: ranged from 11.7 to 42.1 mAs and for the SID the range
was between 100 and 140.6 cm.
Conclusion:
The resulted data demonstrate there is a clear variability in patient dose and
exposure factors set among the selected hospitals. The ED values were seen to
be slightly lower than those reported by the UK (Survey-2010, 0.284 mSv)
and were higher than those reported by certain countries (e.g. Canada, Ghana
etc.). Overall, a periodic checking together with conducting a quality control
testing is highly recommended.
Keywords: Effective dose, AP pelvis, Patient dosimetry, Radiation safety, Radiation
protection

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