Estimation of Variation Dose in Pediatric Phantom Study Using Digital Radiography (Research Article)

Author(s): Gokulchandra Singh Oinam, Majed Naif Allharbi, Naif Abdulrahim Alanazi, Faisal Awadh Alanazi, Fayaz Ul Haq and Abdullah Al Shahrani

Abstract: Aim: The aim of this study was to reduce radiation dose with the pediatric phantom by modifying the exposure and filtering parameters without reducing the image quality. Materials & Methods: The images were acquired using a Pediatric Anthropomorphic Training Phantoms CIRS Model 715 Series and a digital X-ray detector. The phantom was placed in a supine position in all views such as hand (Anterior-Posterior, oblique) and ankle (Anterior-Posterior, Oblique). Different mAs values were used to create three dosage protocols (high, medium and low); each technique also included copper (Cu) filtering. The ESD (Estimated Skin Dose) for each exposure was calculated using DAP (Dose Area Product). For the physical measurement of picture quality, CNR (Contrast to Noise Ratio) was computed using image. Evaluated by 15 observers the Image quality using visual grading analysis (VGA). Results: By using the different dosage regimen, the estimated doses were obtained, for the hand, it ranged from 4.7-45.5uGy and for the ankle it was from 52.9uGy. ESD was shown to decrease as Cu filtering was increased. There was a 0.1 in VGA score difference between high and low dosage procedures without filtering, but a 0.3 difference when filtration was used. VGA scores grew as mAs climbed. Cu filtration and projection adjustments had little effect on fracture visibility. Conclusion: Changing the exposure parameters in digital radiography can lower the dosage while maintaining image resolution in fractures. Without Cu filtration, excellent image quality can be attained with DP (Dorsopalmar) and oblique hand projection. Cu filtering for ankle projections, on the other hand, has little or no effect on overall image quality.

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