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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
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A generalized model for the conversion from CT numbers to linear attenuation coefficients
IEEE Transactions on Nuclear Science, 2003We have developed a generalized model for accurate conversion from CT numbers to linear allenuation coefficients (LAC) by introducing a material-dependent conversion factor (CF). When assuming that a material x is a uniform mixture of water and another material A (we call this the "water-A assumption" in this paper), we show that the conversion from CT
Ling Shao, A J da Silva
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Advanced Two Media (ATM) method for measurement of linear attenuation coefficient
Annals of Nuclear Energy, 2013Linear attenuation coefficient of irregular targets having unknown thickness (La, Pr, Nd, Gd, Tb, Ho and Er) and regular targets of known thickness (Mo, Ag, Sn, W and Pb) at 59.54 keV have been measured by using a new technique named Advanced Two Media (ATM) method.
A S Dhaliwal
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Minerals (Basel, Switzerland), 2020 X-ray computed tomography (XCT) is becoming one of the most important techniques in the geosciences. The technique relies on linear attenuation coefficient differences in order to reveal the internal structure of the rocks. In this work, we present a new
Lunga Bam, Jodie Miller, Megan Becker
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Linear attenuation coefficients for compensator based imrt
Australasian Physics & Engineering Sciences in Medicine, 2007With rapid technological improvements in computer driven 3-D radiotherapy treatment planning systems (RTPS) the use of compensating filters for intensity modulated radiation therapy (IMRT) will dramatically increase the ease of treatment. The procedure for commissioning .decimal (Sanford, Florida) compensators involved the measurement of the effective ...
T, Bartrum +3 more
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Applied Radiation and Isotopes, 2023
For the reconstructed image of transmission computed tomography, the linear attenuation coefficients of the diagnosed object may improve the image quality by adding additional constraint besides the projection data. In the present work, an image reconstruction method with the constraint of the linear attenuation coefficients is developed and two models
Huaiyong, Bai +8 more
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For the reconstructed image of transmission computed tomography, the linear attenuation coefficients of the diagnosed object may improve the image quality by adding additional constraint besides the projection data. In the present work, an image reconstruction method with the constraint of the linear attenuation coefficients is developed and two models
Huaiyong, Bai +8 more
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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
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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,
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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,
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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
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