PURPOSE Recently, Varian Medical Systems have announced the introduction of a new treatment technique, in which dose is delivered over a single gantry rotation with variable MLC positions, dose rate and gantry speed. In February 2008, a preclinical installation of the RapidArc beam delivery approach was carried out on a Varian Clinac at Rigshospitalet in Copenhagen. The purpose of the installat...

By comparing predicted dose images with physically acquired images, radiotherapy fields may be verified. A good portal dose verification chain should be accurate and unrestricted in terms of gantry angle and patient-imager air gap distance. We present latest enhancements and rigorous tests of a portal dose prediction framework based on Monte Carlo (MC) radiation transport. We also present initi...

The decision of the Constitutional Court Number 55/PUU-XVIII/2020 in its ruling gave special treatment to political parties that passed Parliamentary Threshold 2019 not need carry out factual verification, but only with administrative verification. However, this requirement does apply do pass Perlementary 2019. Even though dynamics occur very dynamically, so stages verification and are deemed n...

We present a technique for planning and verification of craniospinal treatment with the patient in the supine position. Treatment delivery and verification is streamlined through the use of modern imaging techniques. Treatments use two lateral brain fields abutted to a single or pair of posterior spine fields. Treatment delivery is simplified by aligning all isocenters in the anterior-posterior...

PURPOSE To evaluate the performance of 2D-array I'mRT MatriXX for dose verification of TomoDirect treatment plans. METHODS In this study, a 2D-array ion chamber device - the I'mRT MatriXX and Multicube Phantom from IBA - was used for dose verification of different TomoDirect plans. Pre-treatment megavoltage computed tomography (MVCT) was performed on the phantom setup for position correction....

This chapter presents an overview of the procedures that are used for the verification of the patient position during radiotherapy. Furthermore, a method for the verification of the radiotherapy isocenter prior to treatment delivery is proposed. The method is based on the alignment of two Computed Tomography (CT) scans: a scan, which is acquired for treatment planning, and an additional verific...

since gait is the mixture of many complex movements, each individual can define with a unique footpressure image that can be used as a reliable biometric scale for human verification. foot pressure colorimages of center for biometrics and security research (cbsr) dataset from 45 men and five womenwere used in this study. owing to the properties of this dataset, an index of foot pressure in addi...

The aim of this chapter is to give an overview of the theoretical foundation and the practical application of logic model checking techniques for the verification of multi-threaded software (rather than hardware) systems. The treatment is focused on the logic model checker SPIN, which was designed for this specific domain of application. SPIN implements an automata-theoretic method of verificat...

Today, many applications for formal circuit verification exist that rely on solvers for Boolean satisfiability (SAT). Usually, these applications use the SAT solver as a black-box. However, exploiting information on the internals of the solving process can speed-up the treatment of the verification task. In this paper, we present the tool VisSAT. VisSAT provides insights into the internals of S...

While simple, intravascular brachytherapy (IVB) presents a considerable potential for harm to the patient. The medical physicist maintains the responsibility to minimize the likelihood of operational problems or dosimetric errors. The principals for safe operation remain the same as with any radiotherapy treatment: to deliver the correct dose, to the correct location, safety. To develop an effe...