Peak kilovoltage (kVp) is an X-ray tube parameter that can influence the radiograph image quality and therefore, if kVp different from nominal value, it provide unnecessary radiation dose to patient examination has be repeated. Therefore, some protection institutions health organizations (ICRP, IAEA) make recommendations monitor in medical diagnostic equipment clinics hospitals. There are metho...

Radiation Sensitive MOSFETs (RADFETs) have been commonly used as ionizing radiation dosimeters. The threshold voltage variation is the main transistor parameter for dosimetry, this directly related to total dose and it can be easily determined by using simple measurement biasing circuits. In work presented a novel experimental method determine optimal drain-source current value supplied p-type ...

A dosimetry system based on Al2O3:C radioluminescence (RL), and RADPOS, a novel 4D dosimetry system using microMOSFETs, were used to measure total scatter factors, (S(c,p))(f(clin))(det), for the CyberKnife robotic radiosugery system. New Monte Carlo calculated correction factors are presented and applied for the RL detector response for the 5, 7.5 and 10 mm collimators in order to correct for ...

We present the design and simulation of a single-walled carbon nanotube(SWCNT)-based field-effect transistor (FET) using Silvaco TCAD. In this paper, theself-heating effect modeling of the CNT MOSFET structure is performed and comparedwith conventional MOSFET structure having same channel length. The numericalresults are presented to show the self-heating effect on the I...

PURPOSE Cone beam computed tomography (CBCT) is fast becoming standard on modern linear accelerators. CBCT increases the dose to regions within and outside the treatment field, potentially increasing secondary cancer induction and toxicity. This study quantified megavoltage (MV) CBCT skin dose and compared it to skin dose delivered during standard tangential breast radiotherapy. METHOD Dosime...