The results show that in this district, one axis azimuth three step tracking and hour angle three step tracking could, respectively, obtain 66.5% and 63.3% higher radiation than that on the horizontal surface all year.
As a caution, simulated treatment plans also suggest that some patients may require such high radiation doses that will lead to a high risk of late complications in the vicinity of the tumour bed, such as necrosis, rupture of blood vessels or excessive fibrosis.
Conventional radiotherapy cannot ablate completely these tumors [2], since this would require unacceptably high radiation doses that result in severe brain damage [3].
The problem is complex due to the expected presence of strong neutron absorbing impurities such as 10B and high radiation field that is mainly caused by 137Cs.
Radiotherapy has a crucial role in the treatment of GBMs, but despite the very high radiation doses that can be delivered with new techniques such as high-dose boost stereotactic radiosurgery, the tumours invariably recur, leading to mortality in 75% of patients by 2 years after initial diagnosis.
Australia is an area of high solar radiation that makes this particular relationship extremely important (Siskind et al, 2002).
Occasional giant solar flares, short-lived eruptions on the Sun's surface, expel matter (along with high-energy radiation) that contributes to this interplanetary medium.
In the first case, a man being treated for tongue cancer at St . Vincents Hospital in Manhattan was subjected to high-energy radiation that was supposed to be directed precisely at the tumor but blasted his brain stem and neck for three days because of a computer problem.
It soon became evident that the event wasn't a typical gamma ray burst, an emission of high-energy radiation that often accompanies a supernova explosion.
