TY - JOUR
T1 - Survey of computed tomography technique and radiation dose in Sudanese hospitals
AU - Suliman, I. I.
AU - Abdalla, S. E.
AU - Ahmed, Nada A.
AU - Galal, M. A.
AU - Salih, Isam
N1 - Funding Information:
The work was supported by the IAEA through the TC project number RAF/9/033 “Strengthening on Radiation Protection of patients and Medical Exposure Control”. The authors are grateful to the Abdu Salam International Centre for Theoretical physics (ICTP), Trieste, Italy for sponsoring the first author in residence as an associate during the writing process of this article. Authors are grateful to the hospitals for their time and cooperation during the data collection.
PY - 2011/12
Y1 - 2011/12
N2 - The purpose of this study was to survey technique and radiation absorbed dose in CT examinations of adult in Sudan and to compare the results with the reference dose levels. Questionnaire forms were completed in nine hospitals and a sample of 445 CT examinations in patients. Information on patient, procedure, scanner, and technique for common CT examinations were collected. For each facility, the radiation absorbed dose was measured on CT dose phantom measuring 16 cm (head) and 32 cm (body) in diameter and was used to calculate the normalized CT air kerma index. Volume CT air kerma index (CVOL), CT air kerma-length product (PKL,CT) values were calculated using the measured normalized CT air kerma index and questionnaire information. The effective dose, E estimates was determined by using PKL,CT measurements and appropriate normalized coefficients. Assuming the sample to offer a fair representative picture of CT practice patterns in Sudan, the mean CVOL and PKL,CT values were comparable or below the reference doses: 65 mGy and 758 mGy cm, respectively at head CT; 11.5 mGy and 327 mGy cm, respectively at chest CT; 11.6 mGy and 437 mGy cm, respectively at abdominal CT; and 11.0 mGy and 264 mGy cm, respectively at pelvis CT. Estimated effective doses were 1.6, 4.6, 6.6 and 4.0 mSv, respectively. The study offered a first national dose survey and provided a mean for quality control and optimization of CT practice within the country.
AB - The purpose of this study was to survey technique and radiation absorbed dose in CT examinations of adult in Sudan and to compare the results with the reference dose levels. Questionnaire forms were completed in nine hospitals and a sample of 445 CT examinations in patients. Information on patient, procedure, scanner, and technique for common CT examinations were collected. For each facility, the radiation absorbed dose was measured on CT dose phantom measuring 16 cm (head) and 32 cm (body) in diameter and was used to calculate the normalized CT air kerma index. Volume CT air kerma index (CVOL), CT air kerma-length product (PKL,CT) values were calculated using the measured normalized CT air kerma index and questionnaire information. The effective dose, E estimates was determined by using PKL,CT measurements and appropriate normalized coefficients. Assuming the sample to offer a fair representative picture of CT practice patterns in Sudan, the mean CVOL and PKL,CT values were comparable or below the reference doses: 65 mGy and 758 mGy cm, respectively at head CT; 11.5 mGy and 327 mGy cm, respectively at chest CT; 11.6 mGy and 437 mGy cm, respectively at abdominal CT; and 11.0 mGy and 264 mGy cm, respectively at pelvis CT. Estimated effective doses were 1.6, 4.6, 6.6 and 4.0 mSv, respectively. The study offered a first national dose survey and provided a mean for quality control and optimization of CT practice within the country.
KW - CT
KW - CT air kerma dose index
KW - CT air kerma-length product
KW - Radiation dose
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U2 - 10.1016/j.ejrad.2010.12.050
DO - 10.1016/j.ejrad.2010.12.050
M3 - Article
C2 - 21237603
AN - SCOPUS:80755172161
SN - 0720-048X
VL - 80
SP - e544-e551
JO - European Journal of Radiology
JF - European Journal of Radiology
IS - 3
ER -