background: the advantages of proton beam in radiation therapy- like small lateral scattering as well as absence of exit dose tail in the organs which are after the tumor- make it capable of delivering more treatment doses to the target and much lesser to the critical tissues near it. materials and methods: in this study, the monte carlo mcnpx code has been used to simulate a slab head phantom ...

Introduction: High spatial resolution left atrial (LA) late gadolinium enhancement (LGE) is acquired during free-breathing with 2D pencil-beam right hemidiaphragm (RHD) respiratory navigator (NAV). A NAV restore pulse with larger diameter is usually applied after the inversion pulse of the LGE sequence to restore the magnetization of the RHD [1]. This NAV restore pulse also re-inverts the pulmo...

The purpose of this paper is to evaluate the ability of a prototype Compton camera (CC) to measure prompt gamma rays (PG) emitted during delivery of clinical proton pencil beams for prompt gamma imaging (PGI) as a means of providing in vivo verification of the delivered proton radiotherapy beams. A water phantom was irradiated with clinical 114 MeV and 150 MeV proton pencil beams. Up to 500 cGy...

background: recent studies in eye plaque brachytherapy have shown a considerable difference between the dosimetric results using water phantom and a model of human eye containing realistic materials. in spite of this fact, there is a lack of simulation studies based on such a model in proton therapy literatures. in the presented work, the effect of utilizing an eye model with ocular media on pr...

Purposes: We perform further development for our previous Gaussian-pencil-beam-model used calculating the electron dose in water under clinical electron-beam irradiation. The main purpose is to evaluate accurately parallel beam depth-doses at deep depths beyond about extrapolated range (Rp) an infinite field. Methods: Sets of field were reconstructed beams E=6, 12, and 18 MeV light Monte Carlo ...

Some recent advances done by the author and his collaborators in the field of antennas and antenna arrays are presented. These include: multiband systems, an infinite-wavelength antenna array series feeding network, a true time delay system allowing beam squint free scanning, a pencil-beam full-space scanning array, a beam-forming system based on active aperture discretization, a MIMO dynamic r...

Background: The advantages of proton beam in radiation therapy- like small lateral scattering as well as absence of exit dose tail in the organs which are after the tumor- make it capable of delivering more treatment doses to the target and much lesser to the critical tissues near it. Materials and Methods: In this study, the Monte Carlo MCNPX code has been used to simulate a slab head phantom ...