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Comparison of radiation doses to patients undergoing standard radiographic examinations with conventional screen–film radiography, computed radiography and direct digital radiography

¹ Medical Physics Department, ² Accident and Emergency Department, S. Orsola-Malpighi Hospital, Via Massarenti 9, 40138 Bologna, Italy

View larger version (116K): [in a new window]   Figure 1. Posteroanterior(PA) chest radiograph obtained with computed radiography: male, 45 years old, 125 kVp, focus to skin distance (FSD) = 151 cm, Exposure Index = 1970 (the Exposure Index recommended by the manufacturer is 2000). The image satisfies the quality criteria for PA chest radiographs given in the European Guidelines [7].

View larger version (79K): [in a new window]   Figure 2. Posteroanterior(PA) chest radiographs obtained with computed radiography and direct digital radiography. (a) Direct digital radiography: female, 47 years old, 125 kVp, focus to skin distance (FSD) = 155 cm. (b) Computed radiography: male, 28 years old, 125 kVp, FSD = 151 cm. Both images satisfy the quality criteria for PA chest radiographs given in the European Guidelines [7].