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Threshold contrast detail detectability curves for fluoroscopy and digital acquisition using modern image intensifier systems

KCARE (King's Centre for the Assessment of Radiological Equipment), King's College Hospital NHS Trust, London SE5 9RS, UK

View larger version (18K): [in a new window]   Figure 1. Average fluoroscopy threshold contrast detail detectability (TCDD) curves for nominal field size ranges (numerical values for these data are included in Table 5): (a) 16–17 cm, (b) 20–25 cm, (c) 29–33 cm and (d) 38–40 cm.

View larger version (9K): [in a new window]   Figure 2. Correction of fluoroscopy HT for exposure rates and field sizes.

View larger version (15K): [in a new window]   Figure 3. Average digital acquisition threshold contrast detail detectability (TCDD) curves for nominal field size ranges (numerical values for these data are included in Table 6): (a) 16–17 cm, 1.4–4.6 µGy; (b) 20–25 cm, 0.39–3.9 µGy; (c) 29–33 cm, 0.46–3.9 µGy; and (d) 38–40 cm, 0.54–1.4 µGy.