For the buffer pipeline room, the annual work duration and the average
dose rate were estimated to be 70 manhours and 0.03 mSv/h, respectively, before optimization, in the absence of detailed maintenance information.
VMAT can provide superior target volume coverage and conformity, with decreased dose to organs at risk for abdominal tumors.[sup][9],[10] A dosimetric comparison between VMAT and IMRT for cervical cancer demonstrated that VMAT reduced treatment time and delivered MUs.[sup][15],[16] However, VMAT can only be implemented using the new generation linacs such as the Varian RapidArc [sup][R] and Elekta Synergy [sup][R], because the requirement for variable
dose rate complicates the control hardware and software of the linacs and prevents most existing linacs from delivering VMAT.
Where D =
dose rate (mSv/min), T = duration of exposure (minute ), P = probacent and Q [sub]REISCD = mortality probability of REISCD.
This study addresses a concern voiced by clinicians that radiation may cause increased complications [4-7], and the principal goal was to isolate effects of radiation
dose rates on polyurethane in a controlled aqueous environment.
To reduce the
dose rate by half, the half value layer (HVL) is used [39] and to reduce it to the tenth part, the tenth value layer (TVL) was used.
Since the
dose rate is linearly related to activity of the radioactive seeds, in the TLD measurement and MC simulation, only 0.4 mCi [sup]125 I seeds were employed in this study.
The
dose rate variation during 1 year is presented in Figure 4.
These are selective pesticides and suggested to be used in recommended
dose rates against their target pests.
From Table 5, it can be seen that the
dose rate at contact is 1.02 mSv/h and at 1 m away from pipe is 0.45 mSv/h.
3), and the total
dose rate does not exceed 2.42 [mu]Gy [h.sup.-1].
Observa is the latest ground breaking innovation from the specialist that measures radiation
dose rates and helps ensure radiation safety and source security
The authors used in their analyses the doubly weighted (via radiation and tissue weighting factors) hypothetical effective
dose rate and effective dose related to total-body irradiation from sources outside the body.
