Radiation exposure inside reinforced concrete buildings at Nagasaki

Abstract

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CGVIEW: A program to generate isometric and perspective views of combinatorial geometries

“…Figure 3 illustrates the use of the geometry debugger based on a TORT input deck. The model is that of the Chinzei school, which was part of previous radiation transport study [7]. Figure 3 depicts a perspective view of the building with the right front quarter removed in order to expose the interior structures such as ilo.ors, walls, and ceilings.…”

Deterministic photon transport calculations in general geometry for external beam radiation therapy

“…4 The salient feature of this method is the use of discrete direction intervals to represent velocities of particles in the radiation field. Deterministic computer programs based on the discrete ordinates method have been extensively applied to radiation shielding calculations and nuclear reactor analysis, 5,6 and recently have been utilized in studies of boron-neutron-capture treatment of brain tumors 7 and in clinical brachytherapy calculations. 8 Nevertheless, deterministic transport calculations have received little attention by the medical physics community for external beam therapy because the discrete ordinates method historically has been limited in its ability to treat geometrically complex systems such as linear accelerator ͑LINAC͒ components and patient anatomy.…”