2 results about "High doses" patented technology

Photon-based radiosurgery is widely used for treating local and regional tumors. The key to improving the quality of radiosurgery is to increase the dose falloff rate from high dose regions inside the tumor to low dose regions of nearby healthy tissues and structures. Dynamic photon painting (DPP) further increases dose falloff rate by treating a target by moving a beam source along a dynamic trajectory, where the speed, direction and even dose rate of the beam source change constantly during irradiation. DPP creates dose gradient that rivals proton Bragg Peak and outperforms Gamma Knife® radiosurgery.

The invention discloses a low-voltage excited derivative-free rare earth alloy negative oxygen ion releasing cluster. The cluster includes a cluster wire and a double-stranded handle body used for fixing the cluster wire, wherein the handle body is connected with a negative ion generator, and the handle body and the cluster wire are made of silver, copper, alum and lithium alloys added with rare earth. The cluster is advantaged in that not only the number of discharge tip filaments achieving high-dose anion release is ensured, but also derivatives such as ozone are not produced, drawbacks of a traditional negative ion released electrode excitation voltage and high cleaning difficulty are overcome, after negative ions are separated from filament tips, a spiral cluster head electrode pushes the negative ions forward due to the charged particle anisotropy repulsion principle to form negative ion spiral waves, in the forward advancement process, the coverage radius of the negative ions is enlarged and the penetrating kinetic energy of the negative ions is increased to form the indoor negative ion bath environment, and a new method is provided for urbanites to create the indoor negative oxygen ion bath recuperation environment, return to the nature, improve the body health and improve the self-healing power.