Micelle gel is a radiochromic hydrogel with the potential to be used as a three dimensional (3D) radiation dosimeter. Since an ideal dosimeter should present water equivalent properties, in this study the water equivalence of two formulations of micelle gel has been investigated by calculating electron density, effective atomic number, fractional interaction probabilities, mass attenuation coef...

Two cases of asymptomatic Bochdalek hernia in adults with identical roentgenographic findings are reported. Computed tomography (CT) in each case revealed a round mass with a low attenuation coefficient identical to that of adipose tissue, abutting the thoracic surface of the diaphragm and connecting with the subdiaphragmatic density through a diaphragmatic defect. A case of diaphragmatic lipom...

UNLABELLED It is common, even with new SPECT/CT systems, that the transmission data are truncated. This paper develops a method that obtains exact attenuation correction with truncated transmission data. The emission object (e.g., the heart) is assumed to have a finite, convex support, whose emission projections are not truncated. The transmission measurements over the support are available, bu...