Half-value layer (HVL) is energy dependent on the photon, much as attenuation coefficient. Increasing penetrating of a photon stream causes an increase in substance's HVL. Before calculating HVL value, linear coefficient (μ) must be established. A review literature indicated that there presently no Monte Carlo-based sufficient tool for direct calculation value and computation suitable material ...

Reverse-biased silicon p-n junction arrays have been proposed as microdosimetry detectors. The tissue equivalence of such detectors in boron neutron capture therapy (BNCT) is discussed. A comparison of the range-energy relationships of H, He, C, and Li ions in tissue (ICRU-muscle) and silicon is given. A simple geometrical scaling (approximately 0.63) of linear dimensions is required to convert...

[1] The Nowcast of Atmospheric Ionizing Radiation for Aviation Safety (NAIRAS) is a real-time, global, physics-based model used to assess radiation exposure to commercial aircrews and passengers. The model is a free-running physics-based model in the sense that there are no adjustment factors applied to nudge the model into agreement with measurements. The model predicts dosimetric quantities i...

Background: A thorough understanding of the Rheumatic Heart disease is important to aid in the management of patients with RHD. We hereby thus study various presentations, distributions, clinical profile of various types of valvular involvement in patients with RHD, complications of RHD such as heart failure, arrhythmias, chamber dilation, thromboembolic manifestation, pulmonary hypertension et...

This study was designed to determine whether volumetric imaging could identify consistent alternative prescription methods to Manchester/point A when prescribing radiation dose in the treatment of cervical cancer using HDR intracavitary brachy-therapy (ICBT). One hundred and twenty-five treatment plans of 25 patients treated for carcinoma of the cervix were reviewed retrospectively. Each patien...