SIMULATED PULMONARY NODULES - DETECTION WITH DUAL-ENERGY DIGITAL VERSUS CONVENTIONAL RADIOGRAPHY
SIMULATED PULMONARY NODULES - DETECTION WITH DUAL-ENERGY DIGITAL VERSUS CONVENTIONAL RADIOGRAPHY
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DOI：
10.1148/radiology.160.3.3526398
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发表时间：
1986-09-01
期刊：
影响因子：
19.7
通讯作者：
BARNES, GT
中科院分区：
文献类型：
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作者：
NIKLASON, LT;HICKEY, NM;BARNES, GT
将原型双能量数字化胸部X线摄影装置在分离钙化和非钙化模拟肺结节方面的性能与高度优化的传统系统进行了比较。将大小（0.5、1.0和1.6 cm）、数量（5 - 11）和钙含量（0-25 mg）不等的结节叠加在冷冻、未防腐的人胸部模型的肺上。对于每种技术，6名观察员检查了50个具有不同随机结节位置的后前位投影。检测包括定位并为每个感知到的结节性混浊分配置信度。真阳性分数与每个投影的假阳性调用平均数的结果图表明，对于钙化和非钙化结节，数字单元的表现明显更好（P <0.01）。
Performance of a prototype dual-energy digital chest radiography unit in detaching 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 < .01).