Mikael P.J. Olsen

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BACKGROUND The image quality of 4DCT depends on breathing regularity. Respiratory audio coaching may improve regularity and reduce motion artefacts. We question the safety of coached planning 4DCT without coaching during treatment. We investigated the possibility of coaching to a more stable breathing without changing the breathing amplitude. The(More)
INTRODUCTION With the purpose of implementing gated radiotherapy for lung cancer patients, this study investigated the interfraction variations in tumour size and internal displacement over entire treatment courses. To explore the potential of image guided radiotherapy (IGRT) the variations were measured using a set-up strategy based on imaging of bony(More)
This report covers the stateof the art of processes that take place in the consolidation of fresh concrete during vibration These processes, theological and mechanical in nature, are discussed to provide better understanding of the principles. The first chapter presents the historical developments relative to consolidating concrete. The second chapter deals(More)
BACKGROUND AND PURPOSE This study aimed at quantifying the breathing variations among lung cancer patients over full courses of fractionated radiotherapy. The intention was to relate these variations to the margins assigned to lung tumours, to account for respiratory motion, in fractionated radiotherapy. MATERIALS AND METHODS Eleven lung cancer patients(More)
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