Diagnostic and Interventional Radiology
Interventional Radiology - Original Article

Radiation dose in balloon dacryocystoplasty: a study using Rando® phantoms and thermoluminescent dosimetry

1.

From the Department of Engineering Physics, Ankara University Faculty of Engineering, Ankara, Turkey

2.

Department of Radiology, Gazi University Medical School, Ankara, Turkey

Diagn Interv Radiol 2005; 11: 166-169
Read: 527 Downloads: 406 Published: 03 September 2019

Abstract

PURPOSE
The radiation dose to the lens of the eye, skin, thyroid and brain of patients who underwent diagnostic and interventional radiological procedures of the lacrimal drainage system have been measured with thermoluminescent dosimeters (TLD-100 and TLD-700) by using an adult male and female Rando® phantom. All dose values for one second of fluoroscopic exposure and one frame of digital subtraction dacryocystography (DS-DCG) exposure have been obtained individually in the pastero-anterior (PA) and lateral (LAT) projections.

MATERIALS AND METHODS
An adult male and female Rando® phantom was used instead of the patients. The procedures were performed by using an Advantx AFM C-arm unit coupled with a DX Hiline digital image acquisition and processing system. The 6-inch mode of a triplefield image intensi.er (II) was used, with a circular collimation of the same or a slightly smaller size. Two different lithium floride (LiF) thermoluminescent chips were used for absorbed dose measurements: TLD700, approximately 4.5 mm in diameter and 0.9 mm in thickness; TLD100, 3.7 mm square and 0.9 mm in thickness.

RESULTS
The average values of absorbed doses (lens of the eye, skin, thyroid and brain) measured separately with TLD100 and TLD700 dosimeters after irradiation of the male and female Rando® phantom are presented for LAT and PA projections.

CONCLUSION
This study suggests that useful information for dose determination can be obtained by use of the radiation dose to the lens of the eye, thyroid and brain received during radiological procedure of the LDS for one frame of DS-DCG and one second of fluoroscopy.

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