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A phantom approach to find the optimal technical parameters for plain chest radiography

Laboratory for Quality Control in Radiology, National Centre of Radiobiology and Radiation Protection, 132 Kliment Ohridski Blvd, Sofia 1756, Bulgaria

View larger version (39K): [in a new window]   Figure 1. Cross-sectional view of the anthropomorphic LucAl chest phantom with 20 objects for objective estimation of image quality (in the right side) and objects for subjective estimation of image quality (in the left side) as described in the text.

View larger version (10K): [in a new window]   Figure 2. Variation of the contrast index C with tube potential for added filters of 1 mm Al and 0.2 mm Cu+1 mm Al at constant optical density 1.8 OD in the lung field for: (a) lung area; (b) cardiac area.

View larger version (13K): [in a new window]   Figure 3. Variations of scatter fraction Ps in the cardiac and the subdiaphragmal areas with half value layer (HVL) at constant optical density 1.8 OD in the lung field.