An small deep-placement fertilizer applicator (SDFA), to realize hill fertilization application and mark location with lime, was developed. It’s unique structure working principle were detailed. Orthogonal tests conducted by the software EDEM virtual simulation in order get parameters of applicator. The rotational torque much higher than resistant after optimization design. Field testing across...

Background and purposeTo investigate the accuracy of dwell position detection with a combined electromagnetic tracking (EMT) brachytherapy (BT) system for treatment verification, by quantifying positional errors due to EM field interference in typical pelvic BT clinical settings.Materials methodsDedicated prostate cervix phantoms were imaged CT. For phantom, Utrecht applicator + interstitial ca...

An extrapolation minichamber was developed for measuring doses from weakly penetrating types of radiation. The chamber was tested at the radiotherapeutic dose level in a beam from a (90)Sr+(90)Y check source, in a beam from a plane (90)Sr+(90)Y ophthalmic applicator, and in several reference beams from an X-ray tube. Saturation, ion collection efficiency, stabilization time, extrapolation curve...

Learning objectives Discuss the role and benefits of MRI in planning for brachytherapy treatment in cervical cancer. Discuss the key mechanisms of the applicator and the technical aspects of planning brachytherapy. Discuss the role of MRI imaging in recognising the features of appropriate applicator placement and common complications. Review key MRI features of radiation-related alterations in ...

Background: The dose rate distribution delivered by a low dose rate 137Cs pellet source, a spherical source used within the source trains of the Selectron gynecological brachytherapy system, was investigated using the MCNP4C Monte Carlo code. Materials and Methods: The calculations were performed in both water and Plexiglas and the absolute dose rate distribution for a single pellet s...

In intracavitary radiotherapy (ICRT) for cancer cervix, applicator geometry has the potential to impact the doses to organs at risk (OARs) and the coverage of the target volume. At our centre two Varian made Fletcher-style applicator sets, namely defined (fixed) geometry and flexible geometry, are used for ICRT. In the present work, the two types of applicators were compared dosimetrically as p...