Abstract: A radiotherapy treatment system and method used for conducting radiographic X-ray imaging on a target organ during radiographic treatment. The system comprises (a) an x-ray beam source configurable to deliver an X-ray beam to a target organ, (b) optical means for converging and shaping said beam to a cone-shaped X-ray beam of photons which hit the target organ simultaneously, (c) multiple high-Z nanoparticles attachable to the target organ, said high-Z nanoparticles absorbing said X-ray radiation and emitting X-ray fluorescence (XRF) photons, (d) at least one XRF detector for detecting said XRF photons ejecting out of a patient's body, and (e) control means for controlling the radiotherapy treatment procedure.

Abstract: A radiation detection and imaging system, which includes at least one radiation detecting and imaging element comprising a planar substrate, a surface of which has been seeded with mercuric iodide grains having a diameter in the range of about 0.01-1.0 micron, before being subjected to a step of deposition thereon of a layer of polycrystalline mercuric iodide having a thickness of up to about 3000 microns. A process for preparing an element such as the one described. A planar substrate, wherein a surface thereof has been seeded with mercuric iodide grains having a diameter in the range of about 0.01-1.0 micron. A physical vapor deposition method for preparing a radiation detecting and imaging element comprising a planar substrate by deposition of a film of mercuric iodide having a maximum thickness of about 3000 microns on a surface on the substrate.

Abstract: An element adapted for at least one use selected from high energy radiation detection, imaging and barrier use, which includes a planar substrate on a surface of which there is a layer polycrystalline mercuric iodide, which has been deposited from the vapor phase, having a thickness within the range of from more than 0.5 mm and up to about 10 mm. A process for preparing an element having such thicknesses. A planar substrate, having deposited on a surface thereof, a layer of mercuric iodide in at least two discrete adjacent sub-layers having a total thickness within the range of from greater than 0.5 mm to about 10 mm. A system adapted for at least one purpose selected from radiation detection, radiation imaging and high energy absorption, which includes an element having thicknesses as described above.