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Zocht je misschien: round, ruud?

Multivariable normal tissue complication probability model-based treatment plan optimization for grade 2-4 dysphagia and tube feeding dependence in head and neck radiotherapy

Kierkels, Roel G J; Wopken, Kim; Visser, Ruurd; Korevaar, Erik W; van der Schaaf, Arjen; Bijl, Hendrik P; Langendijk, Johannes A

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 …

2016-12AlgemeenArtikel

Over auteurs en uitgevers in de 21ste eeuw

Mulder, Ruurd (Faculteit Digitale Media En Creatieve Industrie (Fdmci)); Leighton, Rose

2016-09-14AlgemeenArtikel

Basisinkomen wordt onvermijdelijk

Dommerholt, Egbert

Uit een experiment met het basisinkomen blijkt dat mensen met zo’n inkomen meer naar elkaar omkijken en ook meer aan de studie gaan. Hierdoor neemt het innovatiepotentieel van een land toe. Over het algemeen is de toonzetting redelijk negatief als het om het basisinkomen gaat. Zo ook in het commentaar …

2016-06-14AlgemeenArtikel

Development of an iterative reconstruction method to overcome 2D detector low resolution limitations in MLC leaf position error detection for 3D dose verification in IMRT

Visser, Ruurd; J., Godart; Wauben, D.J.L.; Langendijk, J.; van 't Veld, A.A.; Korevaar, E.W.

The objective of this study was to introduce a new iterative method to reconstruct multi leaf collimator (MLC) positions based on low resolution ionization detector array measurements and to evaluate its error detection performance. The iterative reconstruction method consists of a fluence model, a detector …

2016AlgemeenArtikel

Smart Citizens

Niederer, Sabine; Priester, Ruurd

As web technology and (big) data continue to transform how we organize ourselves, scholarly research increasingly zooms in on the socio-material conditions of citizen participation and public engagement, the objects and devices that organize publics. Where social issues may often be the driver of such …

2016AlgemeenArtikel

Research methods - how to write a research question

van der Heij-Meijer, Annemieke; Visser, Ruurd; Hogg, Peter; Blakeley, Christine; Buissink, Carst

2016AlgemeenBoekdeel

Multicriteria optimization enables less experienced planners to efficiently produce high quality treatment plans in head and neck cancer radiotherapy

Kierkels, Roel G J; Visser, Ruurd; Bijl, Hendrik P; Langendijk, Johannes A; van 't Veld, Aart A; Steenbakkers, Roel J H M; Korevaar, Erik W

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 …

2015-04-12AlgemeenArtikel

Review article – A narrative review on the reduction of effective dose to a paediatric patient by using different combinations of kVp, mAs and additional filtration whilst maintaining image quality

Schaake, Wouter (Healthy Ageing, Allied Health Care And Nursing); Visser, Ruurd; Huizinga, Elsbeth; Bloomfield, Charlotte; Boavida, Filipa; Chabloz, Diane; Crausaz, Emilie; Hustveit, Hanne; Knight, Heidi; Pereira, Anna; Harsaker, Vanja

This paper reviews the literature for lowering of dose to paediatric patients through use of exposure factors and additional filtration. Dose reference levels set by The International Commission on Radiological Protection (ICRP) will be considered. Guidance was put in place in 1996 requires updating …

2015AlgemeenConferentiebijdrage

Experimental article – Reducing effective dose to a paediatric phantom by using different combinations of kVp, mAs and additional filtration whilst maintaining image quality

Huizinga, Elsbeth; Schaake, Wouter (Healthy Ageing, Allied Health Care And Nursing); Visser, Ruurd; Bloomfield, Charlotte; Boavida, Filipa; Chabloz, Diane; Crausaz, Emilie; Hustveit, Hanne; Knight, Heidi; Pereira, Anna; Harsaker, Vanja

Purpose: To determine whether using different combinations of kVp and mAs with additional filtration can reduce the effective dose to a paediatric phantom whilst maintaining diagnostic image quality. Methods: 27 images of a paediatric AP pelvis phantom were acquired with different kVp, mAs and additional …

2015AlgemeenConferentiebijdrage

Analyse van Citizen Empowerment Tools in Amsterdam

Priester, Ruurd; Niederer, Sabine

Is een prelude van het onderzoek naar online tools voor de stedelijke bottom-up beweging (2015-2020)

2014-10AlgemeenBoek

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