Determination and validation of photon energy absorption buildup factor in human tissues using Monte Carlo simulation

2019 ◽  
Vol 160 ◽  
pp. 15-25 ◽  
Author(s):  
Ibrahim Jarrah ◽  
Majdi I. Radaideh ◽  
Tomasz Kozlowski ◽  
Rizwan-uddin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Energy Absorption ◽  
Photon Energy ◽  
Buildup Factor ◽  
Human Tissues

scholarly journals Monte Carlo Modeling and Design of Photon Energy Attenuation Layers for >10× Quantum Yield Enhancement in Si-Based Hard X-ray Detectors

Instruments ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 17
Author(s):  
Eldred Lee ◽  
Kaitlin M. Anagnost ◽  
Zhehui Wang ◽  
Michael R. James ◽  
Eric R. Fossum ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Quantum Yield ◽  
Photon Energy ◽  
High Efficiency ◽  
High Energy ◽  
Yield Enhancement ◽  
X Ray ◽  
Simulation Results ◽  
Conversion Efficiencies

High-energy (>20 keV) X-ray photon detection at high quantum yield, high spatial resolution, and short response time has long been an important area of study in physics. Scintillation is a prevalent method but limited in various ways. Directly detecting high-energy X-ray photons has been a challenge to this day, mainly due to low photon-to-photoelectron conversion efficiencies. Commercially available state-of-the-art Si direct detection products such as the Si charge-coupled device (CCD) are inefficient for >10 keV photons. Here, we present Monte Carlo simulation results and analyses to introduce a highly effective yet simple high-energy X-ray detection concept with significantly enhanced photon-to-electron conversion efficiencies composed of two layers: a top high-Z photon energy attenuation layer (PAL) and a bottom Si detector. We use the principle of photon energy down conversion, where high-energy X-ray photon energies are attenuated down to ≤10 keV via inelastic scattering suitable for efficient photoelectric absorption by Si. Our Monte Carlo simulation results demonstrate that a 10–30× increase in quantum yield can be achieved using PbTe PAL on Si, potentially advancing high-resolution, high-efficiency X-ray detection using PAL-enhanced Si CMOS image sensors.

Gamma-ray energy absorption and exposure buildup factor studies in some human tissues with endometriosis

2011 ◽  
Vol 69 (2) ◽  
pp. 381-388 ◽  
Author(s):  
Murat Kurudirek ◽  
Bekir Doğan ◽  
Metin İngeç ◽  
Neslihan Ekinci ◽  
Yüksel Özdemir
Keyword(s):  
Energy Absorption ◽  
Gamma Ray ◽  
Buildup Factor ◽  
Human Tissues
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