Simulated pulmonary nodules: detection with dual-energy digital versus conventional radiography
| Autor: | Gary T. Barnes, M V Yester, L T Niklason, Dev P. Chakraborty, Sabbagh Ea, N M Hickey, Robert G. Fraser |
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| Rok vydání: | 1986 |
| Předmět: |
medicine.medical_specialty
Lung Neoplasms Dual energy business.industry Radiography Statistics as Topic Calcinosis Nodule (medicine) Imaging phantom Conventional radiography Subtraction Technique Calcium content Cadaver Medicine Humans Radiology Nuclear Medicine and imaging False Positive Reactions Radiology Nodular Opacity medicine.symptom business Nuclear medicine |
| Zdroj: | Radiology. 160(3) |
| ISSN: | 0033-8419 |
| Popis: | Performance of a prototype dual-energy digital chest radiography unit in detecting calcified and noncalcified simulated pulmonary nodules was compared with that of a highly optimized, conventional system. Nodules ranging in size (0.5, 1.0, and 1.6 cm), in number (five to 11), and in calcium content (0-25 mg) were superimposed over the lungs of a frozen, unembalmed, human chest phantom. For each technique, six observers examined 50 posteroanterior projections with different randomized nodule locations. Detection consisted of locating and assigning a level of confidence to each perceived nodular opacity. The resulting plots of the true-positive fraction versus the mean number of false-positive calls per projection indicate that for both calcified and noncalcified nodules, the digital unit performed significantly better (P less than .01). |
| Databáze: | OpenAIRE |
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