Program Information
The Simulation Study of New Flat Panel Detector Structure for Reducing Scattered Radiation Using Anthropomorphic Phantom
Y ROH1*, H Jung1 , G Kim1 , M Park1 , S Park1 , Y Ji1 , K Joo2 ,J Kim3 , (1) Korea Institute of Radiological and Medical Sciences, Seoul, (2) Basic Atomic Energy Research Institute, Myongji University,(3) Kourea University, Seoul,
Presentations
SU-J-CAMPUS-IT-5 (Sunday, July 30, 2017) 4:00 PM - 5:00 PM Room: Imaging ePoster Theater
Purpose: There were many efforts to reduce the scattered radiation for better image quality in the diagnostic radiology. As a part of efforts, the new structure of Cesium Iodide flat panel detector (FPD) has proposed. The proposed FPD system has a net-like lead in the substrate layer, matching the ineffective area on the thin film transistor (TFT) layer to block the scattered radiation so that only primary X-rays could reach the effective area.
Methods: The performance of proposed FPD system was evaluated by Monte Carlo simulation using anthropomorphic phantom for the clinical usage, especially plain chest radiograph with conventional FPD system. To assess the performance of proposed FPD, the number of photons incident on the detector, and the image contrast were simulated at clinical condition with conventional systems. Grid exposure factor was calculated as the reciprocal value of the number of photons incident on the detector.
Results: The lung-soft tissue image contrast of proposed system (0.85) was higher than that of the conventional FPD system (0.77) and slightly lower than that of conventional FPD system equipped with anti-scattered grid (0.87). The grid exposure factor of the conventional FPD system equipped with anti-scatter grid was 2.98 times higher than that of the conventional system, while the grid exposure factor of the proposed system was 1.55 times higher than that of the conventional system.
Conclusion: The structure of proposed FPD system shows the possibility to reduce the exposure dose in plain chest radiography obtaining the equivalent image quality. Also, this study will be adapted to another radiographic examinations or modalities.
Contact Email: