Results 211 to 220 of about 55,053 (254)
Some of the next articles are maybe not open access.
Effect of voltages on γ−Ray linear attenuation coefficients for some semiconductors
Radiation Physics and Chemistry, 2021Abstract In this work, the change according to the different voltages (0, 5, 10, 15, 20 and, 25 V) of γ − ray linear attenuation coefficients for GaSe, GaSe:Cd, GaSe:Sn, GaTe, GaTe:Cd, Ga0.9In0.1Se, GaTe0.4Se0.6, and GaTe0.8Se0.2 semiconductors have been measured by using an extremely narrow collimated-beam transmission method in the energy ...
Zeki Erzeneoğlu, Salih Zeki +2 more
openaire +2 more sources
Physics in Medicine and Biology, 2004
A novel parameterization of x-ray interaction cross-sections is developed, and employed to describe the x-ray linear attenuation coefficient and mass energy absorption coefficient for both elements and mixtures. The new parameterization scheme addresses the Z-dependence of elemental cross-sections (per electron) using a simple function of atomic number,
openaire +2 more sources
A novel parameterization of x-ray interaction cross-sections is developed, and employed to describe the x-ray linear attenuation coefficient and mass energy absorption coefficient for both elements and mixtures. The new parameterization scheme addresses the Z-dependence of elemental cross-sections (per electron) using a simple function of atomic number,
openaire +2 more sources
Calculation of Linear Attenuation Coefficients of Algerian Silica Sand (ASS)
Advanced Science, Engineering and Medicine, 2020Radiation is an important phoneme and thus radiation shielding is one of the most popular subjects for researchers. Sand is the main materials to produce besides many things also construction materials. It may also be used as a decorative material and therefore it is important to know its radiation shielding parameters.
Iskender Akkurt +2 more
openaire +1 more source
Ultrasonic computed tomography reconstruction of the attenuation coefficient using a linear array
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005The attenuation coefficient distribution and sound velocity distribution in the breast can be used to complement B-mode ultrasound imaging in the detection of breast cancer. This study investigated an approach for reconstructing the attenuation coefficient distribution in the breast using a linear array.
Huang, Sheng-Wen, Li, Pai-Chi
openaire +2 more sources
Photon linear attenuation coefficients and water content of normal and pathological breast tissues
Applied Radiation and Isotopes, 1996Normal and pathological breast tissue samples were scanned using a Photon Transmission Tomography (PTT) technique in order to determine their averaged photon linear attenuation coefficients (mu). Subsequent to being freeze-dried the samples were examined, using a high purity germanium detector (HPGe) and the gamma-rays of energy 59.5 keV from an ...
J S, al-Bahri, N M, Spyrou
openaire +2 more sources
Physics in Medicine and Biology, 2010
The measurement of the linear attenuation coefficients of breast tissues is of fundamental importance in the field of breast x-ray diagnostic imaging. Different groups have evaluated the linear attenuation coefficients of breast tissues by carrying out direct attenuation measurements in which the specimens were thin and selected as homogeneous as ...
Chen, R. C. +10 more
openaire +3 more sources
The measurement of the linear attenuation coefficients of breast tissues is of fundamental importance in the field of breast x-ray diagnostic imaging. Different groups have evaluated the linear attenuation coefficients of breast tissues by carrying out direct attenuation measurements in which the specimens were thin and selected as homogeneous as ...
Chen, R. C. +10 more
openaire +3 more sources
The Theoretical Linear Attenuation and Scattering Coefficients of Polymethyl Methacrylate
Proceedings of the National Academy of Sciences, India Section A: Physical SciencesPolymethyl methacrylate (PMMA, C5H8O2) is widely used as a human breast tissue equivalent in medical X-ray technology. PMMA is preferred for reference and dosimetry measurements due to the resemblance in breast tissue’s attenuation and scattering characteristics.
openaire +2 more sources
New method for the determination of the linear attenuation coefficient of γ rays in matter
AIP Conference Proceedings, 2019In our previous participations to the Panhellenic Physics Conference (PPC) we refer to detailed and accurate measurements of 60Co γ-ray attenuation in various absorbers, that our team has performed, and their meaning as well. In the present article we extended these measurements in even more absorbers which already cover a wide range of atomic number ...
E. Adamides +4 more
openaire +1 more source
Near K-edge linear attenuation coefficients for Si, SiO2 and Si3N4
Radiation Physics and Chemistry, 2002Abstract We present tabulated near K-edge linear attenuation coefficients for a range of materials commonly used in MOS construction; namely, crystalline silicon (Si-c), amorphous silicon (Si-a), amorphous silicon dioxide (SiO 2 -a) and amorphous silicon nitride (Si 3 N 4 -a).
Alan Owens, G.W Fraser, S.J Gurman
openaire +1 more source
Accuracy of linear attenuation coefficients measured with a photon counting CT system
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC), 2012The purpose of our research is to develop a photon counting CT system with a semiconductor detector. The photon counting CT system enables us to decompose materials, and this information is useful to diagnose diseases. We developed a new CdTe detector that was able to measure x-rays with the count rate of 107 counts/sec/mm2 with four energy windows ...
Toru Kobayashi +5 more
openaire +1 more source