2020
DOI: 10.3389/fphy.2020.568176
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Calculation of the Beam-Modulation Effect of the Lung in Carbon Ion and Proton Therapy With Deterministic Pencil Beam Algorithms

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Cited by 3 publications
(5 citation statements)
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“…Regions in the CT image consisting of lung parenchyma were filtered by identifying voxels with Hounsfield units (HU) in the range of −900 to −500. These HU values are consistent with the density range of 0.1–0.5 g/cm3 obtained in inflated porcine lung experiments 8,11,15 . A Hounsfield‐range look‐up table was then used in a Siddon‐based raytracing algorithm to compute the total water‐equivalent path length in lung traversed by the beam for each voxel.…”
Section: Methodssupporting
confidence: 78%
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“…Regions in the CT image consisting of lung parenchyma were filtered by identifying voxels with Hounsfield units (HU) in the range of −900 to −500. These HU values are consistent with the density range of 0.1–0.5 g/cm3 obtained in inflated porcine lung experiments 8,11,15 . A Hounsfield‐range look‐up table was then used in a Siddon‐based raytracing algorithm to compute the total water‐equivalent path length in lung traversed by the beam for each voxel.…”
Section: Methodssupporting
confidence: 78%
“…These HU values are consistent with the density range of 0.1-0.5 g/cm 3 obtained in inflated porcine lung experiments. 8,11,15 A Hounsfield-range look-up table was then used in a Siddon-based raytracing algorithm to compute the total water-equivalent path length in lung traversed by the beam for each voxel. Subsequently, the 𝜎 values of Equation (2) were determined by assuming a constant modulation power in all voxels identified as lung parenchyma.…”
Section: Extraction Of the Degree Of Modulationmentioning
confidence: 99%
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“…These studies show the effect and the dependencies on patient treatment plans. The assessments were recently expanded to carbon ions using an analytical dose calculation algorithm (Ringbaek et al 2020). However, these estimations depend strongly on the power of the modulation effect.…”
Section: Introductionmentioning
confidence: 99%