BACKGROUND AND PURPOSE: Radiotherapy of the head and neck is challenged by the relatively large number of organs-at-risk close to the tumor. Biologically-oriented objective functions (OF) could optimally distribute the dose among the organs-at-risk. We aimed to explore OFs based on multivariable normal …

Floating wetland treatment systems (FWTS) are an innovative stormwater treatment technology currently being trialled on a larger scale in Australia. FWTS provide support for selected plant species to remove pollutants from stormwater discharged into a water body. The plant roots provide large surface …

Climate change and urbanization will increase the frequency and magnitude of urban flooding and water quality problems in many regions of the world. In coastal and delta areas like The Netherlands and the Philippines, where urbanization is often high, there has been an increase in the adoption of sustainable …

In dit praktijkgericht onderzoek wordt onderzocht in hoeverre non-coplanaire VMAT SRS als aanvulling op coplanaire VMAT SRS de treatment planning kwaliteit in de behandeling van enkelvoudige hersenmetastasen verbetert en of deze verbetering opweegt tegen een door rotaties van de bestralingstafel veroorzaakte …

Purpose/objective: Stereotactic radiosurgery of brain metastases requires highly conformal dose distributions. Besides beams setup, characteristics of the linear accelerator collimator may also play a role. In this study we compared the impact of leaf width on the dose outside the target for stereotactic …

Purpose / objective: Head and neck cancer patients treated with chemoradiation are at risk for developing trismus (reduced mouth opening). Trismus is often a persisting side-effect and difficult to manage. It impairs eating, speech and oral hygiene, affecting quality of life. Although several studies …

OBJECTIVES: To demonstrate that novice dosimetry planners efficiently create clinically acceptable IMRT plans for head and neck cancer (HNC) patients using a commercially available multicriteria optimization (MCO) system. METHODS: Twenty HNC patients were enrolled in this in-silico comparative planning …

PURPOSE: Advanced radiotherapy treatments require appropriate quality assurance (QA) to verify 3D dose distributions. Moreover, increase in patient numbers demand efficient QA-methods. In this study, a time efficient method that combines model-based QA and measurement-based QA was developed; i.e., the …

This research is conducted in Ghana for Aqua Vitens Rand Limited, acting as operator of the water systems of the Ghana Water Company Ltd. This research was part of the minor Development Cooperation from the The Hague University of Applied Sciences. The research consisted of a field trip of 7 weeks to …

This thesis is an overview of the market and management for WEEE (waste of electrical and electronic equipment) in Bulgaria. It was executed to answer certain questions to WEEE Forum, which was my internship provider. Chapter 2 analyzes the WEEE market and business developments in Bulgaria. Chapter 2.1 …