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. 2011 Jul-Sep;7(3):e22.
doi: 10.2349/biij.7.3.e22. Epub 2011 Jul 1.

Evaluation of radiation dose to patients undergoing interventional radiology procedures at Ramathibodi Hospital, Thailand

J Urairat  1 , S Asavaphatiboon, S Singhara Na Ayuthaya, N Pongnapang
Affiliations

Evaluation of radiation dose to patients undergoing interventional radiology procedures at Ramathibodi Hospital, Thailand

J Urairat et al. Biomed Imaging Interv J. 2011 Jul-Sep.

Abstract

Purpose: This study was carried out to assess the radiation dose to patients undergoing interventional radiology procedures at Ramathibodi Hospital, Bangkok, Thailand.

Methods: Data were collected from 60 patients under transarterial oily-chemoembolisation (TOCE) and femoral angiography performed with the Toshiba Infinix model VC-i FPD single plane system. Data were also collected from 60 patients who underwent brain arteriovenous malformations (AVM) and dural-arteriovenous fistula (DAVF) embolisation, performed with the Toshiba Infinix model VF-i bi-plane systems. A built-in air kerma area product (KAP) meter calibrated in situ was used for the skin dose calculation.

Results: The calibration coefficient of air kerma area product meter at tube voltage between 50 kV and 100 kV was found to vary within ± 5.07%, ± 7.2%, ± 4.86 % from calibration coefficient of 80 kV for a single-plane, tube 1 and tube 2 of bi-plane x-ray system, respectively. Mean air kerma area product values were 90.99 ± 52.89, 31.02 ± 17.92, 33.11 ± 23.99 (Frontal), 35.01 ± 19.10 (Lateral), 50.15 ± 44.76 (Frontal), 97.31 ± 44.12 (Lateral) Gy-cm(2) for transarterial oily-chemoembolisation, femoral angiography, diagnostic cerebral angiography, therapeutic cerebral angiography, respectively. The therapeutic cerebral angiography procedure was found to give the highest entrance dose, number of images and fluoroscopy time: 362.63 cGy (Lateral), 1015 images (Lateral) and 126 minutes, respectively. However, the highest air kerma area product value was from transarterial oily-chemoembolisation with 264.37 Gy-cm(2). There were 2 cases of therapeutic cerebral angiography, where the patient entrance dose was higher than 3 Gy in the frontal view, which reached the deterministic threshold for temporary epilation.

Conclusion: Very wide variationswere found in patient dose from different interventional procedures. There is a need for a dose record system to provide feedback to radiologists who perform the procedures; especially in cases where the dose exceeds the deterministic threshold.

Keywords: Air Kerma Area Product (KAP); Entrance dose; Interventional Radiology; Patient doses; Radiation doses.

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References

    1. National Council on Radiation Protection and Measurements. NCRP Report No. 160 Pie Charts [Online]. [Accessed 2009 Nov 18]. Available at: URL: http://www.ncrponline.org/Publications/160_Pie_charts.html.
    1. Joint WHO/ISH Workshop on Efficacy and Radiation Safety in Interventional Radiology, 9-13 October 1995. Neuherberg, Germany: Bundesamtfür Strahlenschutz; 1997.
    1. US Food and Drug Administration. Avoidance of serious X-ray-induced skin injuries to patients during fluoroscopically guided procedures. Med Bull. 1994;24:7–17.
    1. Crawley MT, Mutch S, Nyekiova M, Reddy C, Weatherburn H. Calibration frequency of dose–area product meters. Brit J Radiol. 2001;74(879):259–261. - PubMed
    1. Vano E, Sanchez R, Fernandez JM, Gallego JJ, Verdu JF, de Garay MG, Azpiazu A, Segarra A, Hernandez MT, Canis M, Diaz F, Moreno F, Palmero J. Patient dose reference levels for interventional radiology: A national approach. Cardiovasc Intervent Radiol. 2009;32(1):19–24. - PubMed

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