Dr. Wolfgang A. Recheis Profile

Dr. Wolfgang A. Recheis

at Medizinische Univ Innsbruck

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Publications (10)

Proceedings Article | 13 March 2019 Paper

Predicting resection volumes within the nasal cavity to improve patients breathing

Manuel Berger, Martin Pillei, Andreas Mehrle, Wolfgang Recheis, Florian Kral, Michael Kraxner, Wolfgang Freysinger

Proceedings Volume 10950, 1095036 (2019) https://doi.org/10.1117/12.2512358

KEYWORDS: Optical spheres, Surgery, Computer simulations, Computed tomography, Binary data, Image segmentation, Optical simulations, Laser Doppler velocimetry, Tomography, Dielectrophoresis

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Proceedings Article | 14 April 2005 Paper

Planning of minimal destructive neurosurgery: preoperative fMRI and intraoperative cortical stimulation

Michael Verius, Ralf Huttary, Florian Koppelstaetter, C. Siedentopf, Thomas Fiegele, Wolfgang Recheis, S. Golaszewski, Stephan Felber, Wilhelm Eisner, Dieter Zur Nedden

Proceedings Volume 5746, (2005) https://doi.org/10.1117/12.595030

KEYWORDS: Functional magnetic resonance imaging, Brain, Magnetic resonance imaging, Brain mapping, Sensors, Tumors, Neurons, Positron emission tomography, Head, Surgery

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Proceedings Article | 14 April 2005 Paper

Methods of in-vivo mouse lung micro-CT

Wolfgang Recheis, Earl Nixon, Jacqueline Thiesse, Geoffrey McLennan, Alan Ross, Eric Hoffman

Proceedings Volume 5746, (2005) https://doi.org/10.1117/12.598464

KEYWORDS: Lung, In vivo imaging, Calibration, Scanners, Mouse models, Pixel resolution, Sensors, X-rays, Aluminum, Image quality

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Micro-CT will have a profound influence on the accumulation of anatomical and physiological phenotypic changes in natural and transgenetic mouse models. Longitudinal studies will be greatly facilitated, allowing for a more complete and accurate description of events if in-vivo studies are accomplished. The purpose of the ongoing project is to establish a feasible and reproducible setup for in-vivo mouse lung micro-computed tomography (μCT). We seek to use in-vivo respiratory-gated μCT to follow mouse models of lung disease with subsequent recovery of the mouse. Methodologies for optimizing scanning parameters and gating for the in-vivo mouse lung are presented. A Scireq flexiVent ventilated the gas-anesthetized mice at 60 breaths/minute, 30 cm H20 PEEP, 30 ml/kg tidal volume and provided a respiratory signal to gate a Skyscan 1076 μCT. Physiologic monitoring allowed the control of vital functions and quality of anesthesia, e.g. via ECG monitoring. In contrary to longer exposure times with ex-vivo scans, scan times for in-vivo were reduced using 35μm pixel size, 158ms exposure time and 18μm pixel size, 316ms exposure time to reduce motion artifacts. Gating via spontaneous breathing was also tested. Optimal contrast resolution was achieved at 50kVp, 200μA, applying an aluminum filter (0.5mm). There were minimal non-cardiac related motion artifacts. Both 35μm and 1μm voxel size images were suitable for evaluation of the airway lumen and parenchymal density. Total scan times were 30 and 65 minutes respectively. The mice recovered following scanning protocols. In-vivo lung scanning with recovery of the mouse delivered reasonable image quality for longitudinal studies, e.g. mouse asthma models. After examining 10 mice, we conclude μCT is a feasible tool evaluating mouse models of lung pathology in longitudinal studies with increasing anatomic detail available for evaluation as one moves from in-vivo to ex-vivo studies. Further developments include automated bronchial tree segmentation and airway wall thickness measurement tools. Improvements in Hounsfield unit calibration have to be performed when the interest of the study lies in determining and quantifying parenchymal changes and rely on estimating partial volume contributions of underlying structures to voxel densities.

Proceedings Article | 14 April 2005 Paper

Three-dimensional visual truth of the normal airway tree for use as a quantitative comparison to micro-CT reconstructions

Jacqueline Thiesse, Joseph Reinhardt, Jessica de Ryk, Eman Namati, Jessica Leinen, Wolfgang Recheis, Eric Hoffman, Geoffrey McLennan

Proceedings Volume 5746, (2005) https://doi.org/10.1117/12.596806

KEYWORDS: Lung, Tissues, Pathology, 3D modeling, Image segmentation, 3D metrology, 3D image processing, Mouse models, Imaging systems, Visualization

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Proceedings Article | 28 April 2004 Paper

Dopplersonographic analysis of the flow field in femoral arteries with stent implants

Michael Verius, Ralf Huttary, Wolfgang Recheis, Dieter zur Nedden

Proceedings Volume 5373, (2004) https://doi.org/10.1117/12.536837

KEYWORDS: 3D modeling, Doppler effect, Silicon, Arteries, Ultrasonography, Blood, 3D metrology, 3D displays, Fluid dynamics, Hemodynamics

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Proceedings Article | 2 May 2003 Paper

Unilateral pleural effusion in an animal model: evaluation of lung function with EBCT

Wolfgang Recheis, Leo Pallwein, Peter Soegner, Ralph Faschingbauer, Georg Schmidbauer, Axel Kleinsasser, Alexander Loeckinger, Christoph Hoermann, Dieter zur Nedden

Proceedings Volume 5031, (2003) https://doi.org/10.1117/12.480319

KEYWORDS: Lung, Image segmentation, Animal model studies, Computed tomography, Image processing, Visualization, Image analysis, Tissues, Blood, Chest

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Proceedings Article | 24 April 2002 Paper

Imaging the cardiac blood flow during CPR with EBCT in an animal model

Wolfgang Recheis, Antonius Schuster, Leo Pallwein-Prettner, Axel Kleinsasser, Alexander Loeckinger, Christoph Hoermann, Dieter zur Nedden

Proceedings Volume 4683, (2002) https://doi.org/10.1117/12.463571

KEYWORDS: Blood circulation, Computed tomography, Heart, Visualization, Chest, Factor analysis, Blood, Animal model studies, Hemodynamics, Image analysis

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Proceedings Article | 21 May 2001 Paper

Changes of air-tissue ratio evaluated by EBCT after cardiopulmonary resuscitation (CPR): validation in swine

Wolfgang Recheis, Antonius Schuster, Axel Kleinsasser, Alexander Loeckinger, Christoph Hoermann, Dieter zur Nedden

Proceedings Volume 4321, (2001) https://doi.org/10.1117/12.428140

KEYWORDS: Lung, Hemodynamics, Tissues, Magnesium, Blood, Computed tomography, Image segmentation, Hypoxia, Animal model studies, Chest

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Proceedings Article | 20 April 2000 Paper

Respirator triggering of electron-beam computed tomography (EBCT): differences in dynamic changes between augmented ventilation and controlled mechanical ventilation

Wolfgang Recheis, Axel Kleinsasser, Antonius Schuster, Alexander Loeckinger, Thomas Frede, Peter Springer, Christoph Hoermann, Dieter zur Nedden

Proceedings Volume 3978, (2000) https://doi.org/10.1117/12.383420

KEYWORDS: Lung, Visualization, Computed tomography, Image segmentation, Image processing, Tissues, Electron beams, Physiology, Analog electronics, Software development

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Proceedings Article | 20 May 1999 Paper

Respirator triggering of electron beam computed tomography (EBCT): evaluation of dynamic changes during mechanical expiration in the traumatized patient

Wolfgang Recheis, Axel Kleinsasser, Robert Hatschenberger, Rudolf Knapp, Dieter zur Nedden, Christoph Hoermann

Proceedings Volume 3660, (1999) https://doi.org/10.1117/12.349586

KEYWORDS: Lung, Image segmentation, Computed tomography, Tissues, Electron beams, Image analysis, Scanners, Blood, Temporal resolution, Data acquisition

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Showing 5 of 10 publications

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