Proposed Guidelines for Image Quality Optimization in Chest PA X-Ray Examinations In Bangladesh

Khan, Shahed and Santos, Eleonora (2015): Proposed Guidelines for Image Quality Optimization in Chest PA X-Ray Examinations In Bangladesh. Published in: Springer International Publishing, , Vol. 51, (June 2015): pp. 795-797.

Abstract

The common practice for chest PA examinations in Bangladesh employ low kV imaging. This practice involves low-contrast images and requires much larger radiation doses than those associated with higher beam energy. Thus, we propose a model relating the change of Entrance Surface Dose (ESD) in response to changes in beam energy, in accordance with European standards for diagnostic radiographic chest imaging to find the optimal ESD corresponding to values of kVp used in Bangladeshi hospitals. Results show that in order to maintain the standards of Quality for Diagnostic Radiographic Image every 10kVp increase in beam energy must be followed by a decrease of 8/6 in ESD that corresponds to a reduction of 15% in the equivalent dose. Hence, the range of optimal ESD accounting for the kVps practiced for chest PA examinations is 5.6-10 mGy, which represents a factor of 35 above the recommended ESD. Finally we investigate the effect of Body Mass Index (BMI) on optimal ESD for overweighed Bangladeshi patients. We find that, for each additional 1kg, the ESD must increase 18% in order to maintain standards for chest PA x-ray image.

• Item Type: MPRA Paper
• Language: English
• Keywords: Diagnostic Imaging, Radiation Protection and Dosimetry, Quality Control
• Subjects: I - Health, Education, and Welfare > I1 - Health > I10 - General

References

[1] Begum Z. (2001). Entrance surface dose measurement for some of the radiological patients in Bangladesh. Rad Prot Dosim. 95(3):257-262.

[2] Begum Z. (2013). Present Status of Quality assurance in Diagnostic radiology in Bangladesh. In: M. Long. IFMBE Proc. vol 39 World Congress of Med Phys & Biomed. Eng.1045-1048.

[3] European Commission (1996). European Guidelines on Quality Criteria for Diagnostic Radiographic Images. Eur 16260 . (Commission E, ed.).

[4] Wall B, Hillier M, Haylock R, Hart D, Jansen J. (2011). Radiation risks from medical x-ray examinations as a function of the age and sex of the patient. Didcot.

[5] ICRP. (2007). The 2007 Recommendations of the International Commission on Radiological Protection. 37:2-4.

[6] Miah, F.K.; Rab M., Begum M. (1998). Compilation of anatomical, physiological and metabolic characteristics for a Bangladeshi man. Country Reports. Results of a coordinated research Programme 1988-1993, IAEA ed. Compilation of anatomical, physiological and metabolic characteristics for a Reference Asian Man. 2.

[7] Yanch J., Behrman R., Hendricks M. (2009). Increased radiation dose to overweight and obese patients from radiographic examinations. I Radiol. 252(1):128-139.

[8] Warren-Forward H., Bradley D. (1993). A pilot study of chest X-ray doses and dose variability within the West Midlands Regional Health Authority. J Radiol Prot. 13(4):267.

[9] ICRP. (2009). Adult reference computational phantoms International Commission on Radiological Protection. ICRP Publ 110. 39(2).

[10] Lampinen J. (2000). Calculating Patient Specific Doses In X-Ray Diagnostics and from Radiopharmaceuticals. doi: ISSN 0356-0961, ISBN 951-45-8198-9.