Klaus Bacher

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BACKGROUND Cone beam computed tomography (CBCT) has become an extremely useful technique for dentomaxillofacial imaging because it provides clear images of highly contrasted structures. Previous studies evaluating the applicability of this technique in otologic imaging were very encouraging but were only performed in vitro on temporal bone specimens. The(More)
OBJECTIVES Investigation of DNA damage induced by CT x-rays in paediatric patients versus patient dose in a multicentre setting. METHODS From 51 paediatric patients (median age, 3.8 years) who underwent an abdomen or chest CT examination in one of the five participating radiology departments, blood samples were taken before and shortly after the(More)
PURPOSE The impact on patients' health of radiopharmaceuticals in nuclear medicine diagnostics has not until now been evaluated systematically in a European context. Therefore, as part of the EU-funded Project PEDDOSE.NET ( www.peddose.net ), we review and summarize the(More)
INTRODUCTION Metal artifacts may negatively affect radiologic assessment in the oral cavity. The aim of this study was to evaluate different metal artifact reduction techniques for metal artifacts induced by dental hardware in CT scans of the oral cavity. METHODS Clinical image quality was assessed using a Thiel-embalmed cadaver. A Catphan phantom and a(More)
  • A A Sirenko, A Kazimirov, R Huang, D H Bilderback, S O 'malley, V Gupta +3 others
  • 2005
Structural and optical properties of the InGaAlAs-based multiple quantum well ͑MQW͒ 1.3 ␮m laser structures produced on InP ͑001͒ substrates by metal organic vapor phase epitaxy ͑MOVPE͒ technique in the regime of selective area growth ͑SAG͒ have been studied. An x-ray beam of 10 ␮m diameter generated by a microbeam high-resolution x-ray diffraction(More)
The purpose of this study was to investigate the influence of the localizer and scan direction on the dose-reducing efficacy of the automatic tube current modulation (ATCM) in computed tomography (CT). Craniocaudal and caudocranial chest CT scans, based on anterior-posterior (AP), posterior-anterior (PA), lateral (LAT) or dual AP/LAT localizers, of an(More)
BACKGROUND The first aim of this study was to evaluate the correlation between clinical and physical-technical image quality applied to different strengths of iterative reconstruction in chest CT images using Thiel cadaver acquisitions and Catphan images. The second aim was to determine the potential dose reduction of iterative reconstruction compared to(More)
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