Assessment of Entrance Surface Air Kerma from Chest X-ray Examination at Klongthom Hospital

Authors

  • Sumanat Piriyaudomporn Department of Radiology, Klongthom Hospital, Petchkasem Road, Klongthom Tai, Klongthom District, Krabi 81120 Thailand

Keywords:

Entrance Skin Dose, Entrance Surface Air Kerma, Diagnostic Reference Levels

Abstract

Introduction: Entrance Surface Air Kerma (ESAK) obtained from radiographic chest x-ray examination should be evaluated for optimizing radiation exposure to patients. This work aimed to evaluate the radiation dose in terms of ESAK of the patients who underwent radiographic chest radiography examinations at Klomthom Hospital and to compare the ESAK with the Thailand National Diagnostic Reference Levels (NDRLs) and the other studies. Methods: The ESAK was calculated using the radiation output of a radiographic machine and backscatter factor (BSF) obtained from a total of 100 chest radiographic patients. The radiation output was carried out with Piranha x-ray dosimeter. Values of typical dose level was established using the median of ESAK. Results: The results revealed that the mean, median and 75th percentile of ESAK for posterior-anterior (PA) chest radiography at Klongthom Hospital were 0.12 mGy, 0.11 mGy and 0.14 mGy, respectively. The median ESAK of the patients in this study was lower than the 75th percentile ESAK of national DRLs and comparable to the ESAK values published in the literatures. Conclusion: Entrance Surface Air Kerma derived from radiographic chest x-ray examination using exposure parameter settings in our hospital was within the acceptable level and DRLs.

References

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Published

2023-04-02

How to Cite

1.
Piriyaudomporn S. Assessment of Entrance Surface Air Kerma from Chest X-ray Examination at Klongthom Hospital. Thai J Rad Tech [Internet]. 2023 Apr. 2 [cited 2024 Apr. 28];48(1):11-7. Available from: https://he02.tci-thaijo.org/index.php/tjrt/article/view/259864

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Original articles