Small pulmonary nodules: volume measurement at chest CT--phantom study.
作者： Jane P. Ko , Henry Rusinek , Erika L. Jacobs , James S. Babb , Margrit Betke
DOI: 10.1148/RADIOL.2283020059
关键词: Attenuation 、 Medicine 、 Nodule (medicine) 、 Ct technique 、 Volume (compression) 、 Volume measurement 、 Nuclear medicine 、 Chest ct 、 Pulmonary nodule 、 Imaging phantom
摘要: Three-dimensional methods for quantifying pulmonary nodule volume at computed tomography (CT) and the effect of imaging variables were studied by using a realistic phantom. Two fixed-threshold methods, partial-volume method (PVM) variable method, used to calculate volumes 40 plastic nodules (largest dimension, <5 mm: 20 with solid attenuation ground-glass attenuation) known volume. Tube current times (20 120 mAs), reconstruction algorithms (high low frequency), characteristics studied. Higher precision was associated use PVM predetermined pure attenuation, high-frequency algorithm, diagnostic CT technique (120 mAs). A is promising quantification follow-up nodules.
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