Effect of lung volume on counting efficiency: A Monte Carlo investigation
Effect of lung volume on counting efficiency: A Monte Carlo investigation
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DOI：
10.1097/01.hp.0000152112.80491.86
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发表时间：
2005-04-01
期刊：
影响因子：
2.2
通讯作者：
Capello, K
中科院分区：
文献类型：
--
作者：
Kramer, GH;Capello, K
肺计数器通常使用具有固定肺大小的人体测量体模进行校准;然而，人们的肺大小（体积和尺寸）差异很大。这项工作使用了一个简单的蒙特卡罗模拟调查的效果上的计数效率的肺计数器的基础上的四个探测器阵列的直径为50 mm，70 mm直径，或85 mm直径的肺大小的变化。模拟是在几个光子能量（17，60，120和1,000 keV）。将模拟的效率与接近参考人肺体积的参考值进行比较，发现偏差在-21%至63%的范围内。从蒙特卡罗模拟的值也进行了比较与一些文献数据的基础上实验测量，并发现协议是可比的，这表明肺容量确实是一个因素，应考虑当试图作出准确的估计肺负担。
Lung counters are usually calibrated with an anthropometric phantom that has a fixed lung size; however, people have widely varying lung sizes (both volume and dimensions). This work uses a simple Monte Carlo simulation to investigate the effect on the counting efficiency of a lung counter based on a four detector array of 50 mm diameter, 70 mm diameter, or 85 mm diameter as lung size varies. The simulations were carried out at several photon energies (17, 60, 120, and 1,000 keV). Comparing the simulated efficiencies with a reference value close to the lung volume of Reference Man, biases in the range of -21% to 63% were discovered. The values from the Monte Carlo simulation have also been compared with some literature data based on experimental measurements, and the agreement was found to be comparable suggesting that lung volume is indeed a factor that should be considered when trying to make an accurate estimate of a lung burden.