Abstract
Purpose: The location and the field size of the incident X‐ray beam in panoramic dental radiography most often cannot be ascertain visually. These parameters are needed for quality control testing and dosimetry determination. To alleviate this problem, GafChromic XR‐QA film was tested on two panoramic systems. Method and Materials: For each system, the dose‐area product was computed with the length of a cross section image of the incident beam and the exposure measurement with a pencil ion chamber. The result was confirmed by direct analysis of a dose distribution on a film. Placement of the ion chamber was determined by these images. The dose‐area products were thus determined to be 713 cGy.mm2 and 721 cGy.mm2 . From these values, the effective doses were computed to be 5.2 μSv and 5.3 μSv respectively. Results and Conclusion: This version of radiochromic film has thus been demonstrated to be a useful complement to a pencil ion chamber in the testing of a panoramic radiography system.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
