Gantry structure has the advantages of easy production, high bearing capacity, stability and so on. It is widely used in engineering. There is an optimal solution for different structural parameters in gantry. In the practical engineering application, the safety factor is higher, which can meet the load demand, and the weight is less. In this paper, the advantages and disadvantages of the colum...

One of the main advantages of the Gantry-Tau machine is a large accessible workspace/footprint ratio compared to many other parallel machines. The Gantry-Tau improves this ration further by allowing a change of assembly mode without internal link collisions or collisions between the links and end-effector. The reconfigurable Gantry-Tau kinematic design obtained by multi-objective optimisation a...

BACKGROUND In radiotherapy treatments, it is crucial to monitor the performance of linac components including gantry, collimation system, and electronic portal imaging device (EPID) during arc deliveries. In this study, a simple EPID-based measurement method is suggested in conjunction with an algorithm to investigate the stability of these systems at various gantry angles with the aim of evalu...

Abstract Arc-therapy is a dose delivery technique regularly applied in photon radiation therapy, and currently subject of great interest for proton therapy as well. In this technique, beams are aimed at tumor from different continuous ranges incident directions (so called ‘arcs’). This can potentially yield better conformity around the very low surrounding healthy tissue. Currently, proton-arc ...

This study investigates the feasibility and applicability of cone beam CT for a megavoltage therapeutic LINAC. A Rando head phantom was irradiated using the 15 MV beam of a Varian 2100C LINAC at MSKCC for gantry angles from -102° to 102° with a 2° increment. The projection image for each gantry angle was obtained using a Varian Mark II EPID. Reference images without phantom were also collected ...

BACKGROUND Since December 2009 a new VMAT planning system tool is available in Oncentra MasterPlan v3.3 (Nucletron B.V.). The purpose of this study was to work out standard parameters for the optimization of prostate cancer. METHODS For ten patients with localized prostate cancer plans for simultaneous integrated boost were optimized, varying systematically the number of arcs, collimator angl...