By a News Reporter-Staff News Editor at Health & Medicine Week -- Researchers detail new data in Therapeutics. According to news originating from Granada, Spain, by NewsRx correspondents, research stated, "The experimental response of different commercial metal-oxide-semiconductor transistors to electron beams in order to check their capabilities as radiation sensors for intra-operative radiotherapy treatments is studied. The main characteristics of the radiation response, such as sensitivity and reproducibility, have been determined using measuring algorithms previously developed by our research group for photon beams and which allow, among other advantages, the thermal compensation of the devices."
Our news journalists obtained a quote from the research from the University of Granada, "Reproducing typical intra-operative radiotherapy treatment sessions, several vertical and lateral p-channel transistors in different configurations (single and two stacked transistors, unbiased and biased during irradiation) have been studied. Non zero temperature coefficients are presented in the analyzed vertical transistors (BS250F, ZVP3306 and ZVP4525) and their responses show a linear behaviour with a low dispersion in the results obtained for all the studied devices. Though all of them appear to be reliable for electron dosimetry, the best candidates are the transistors included in the well known integrated circuit CD4007, due to its higher sensitivity and better thermal compensation. In this case, a sensitivity of 13 +/- 1 mV/Gy to 6 MeV electron beams has been measured with two stacked devices in biased mode."
According to the news editors, the research concluded: "Linearity and uncertainty are comparable to that of commercial dosimetry sensors, while sensitivity is smaller."
For more information on this research see: General purpose MOSFETs for the dosimetry of electron beams used in intra-operative radiotherapy. Sensors and Actuators A-Physical, 2014;210():175-181. Sensors and Actuators A-Physical can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland (see also Therapeutics).
The news correspondents report that additional information may be obtained from M.S. Martinez-Garcia, University of Granada, Dept. of Fis Atom Mol & Nucl, E-18071 Granada, Spain. Additional authors for this research include F. Simancas, A.J. Palma, A.M. Lallena, J. Banqueri and M.A. Carvajal.
Keywords for this news article include: Spain, Europe, Granada, Radiotherapy, Therapeutics
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