The Varioscope AR - A Head-Monted Operating Microscope for Augmented Reality. - Wolfgang Birkfellner; Michael Figl; Klaus Huber; Franz Watzinger; Felix Wanschitz; Rudolf Hanel; Arne Wagner; Dietmar Rafolt; Rolf Ewers; Helmar Bergmann (MICCAI, 2000)

Accuracy of a Navigation System for Computer-Aided Oral Implantology. - Wolfgang Birkfellner; Felix Wanschitz; Franz Watzinger; Klaus Huber; Michael Figl; Christian Schopper; Rudolf Hanel; Franz Kainberger; Joachim Kettenbach; Sanda Patruta; Rolf Ewers; Helmar Bergmann (MICCAI, 2000)

Calibration of a head-mounted operating microscope for augmented reality visualization in CAS. - Wolfgang Birkfellner; Michael Figl; Klaus Huber; Franz Watzinger; Felix Wanschitz; Rudolf Hanel; Johann Hummel; Rolf Ewers; Helmar Bergmann (CARS, 2001)

Fusion of MR and CT scans of the pelvis in cases of malignant bone tumors. - Wolfgang Birkfellner; Eva Schwameis; Friedrich Vorbeck; Rudolf Hanel; Wolfgang Greimel; Johann Hummel; Michael Figl; Franz Kainberger; Herwig Imhof; Rainer Kotz; Helmar Bergmann (CARS, 2001)

Current Status of the Varioscope AR, a Head-Mounted Operating Microscope for Computer-Aided Surgery. - Michael Figl; Wolfgang Birkfellner; Johann Hummel; Rudolf Hanel; Peter Homolka; Franz Watzinger; Felix Wanschitz; Rolf Ewers; Helmar Bergmann (ISAR, 2001)

Calibration of projection parameters in the varioscope AR, a head-mounted display for augmented-reality visualization in image-guided therapy. - Wolfgang Birkfellner; Michael Figl; Klaus Huber; Johann Hummel; Rudolf A. Hanel; Peter Homolka; Franz Watzinger; Felix Wanschitz; Rolf Ewers; Helmar Bergmann (Image-Guided Procedures, 2001)

The Control Unit for a Head Mounted Operating Microscope Used for Augmented Reality Visualization in Computer Aided Sugery. - Michael Figl; Wolfgang Birkfellner; Christopher Ede; Johann Hummel; Rudolf Hanel; Franz Watzinger; Felix Wanschitz; Rolf Ewers; Helmar Bergmann (ISMAR, 2002)

Stereoscopic visualization in the varioscope AR: a see-through head-mounted display for surgical navigation. - Wolfgang Birkfellner; Michael Figl; Christian Matula; Johann Hummel; Rudolf A. Hanel; Herwig Imhof; Felix Wanschitz; Arne Wagner; Franz Watzinger; Helmar Bergmann (Image-Guided Procedures, 2002)

PC-based control unit for a head-mounted operating microscope for augmented-reality visualization in surgical navigation. - Michael Figl; Wolfgang Birkfellner; Franz Watzinger; Felix Wanschitz; Johann Hummel; Rudolf A. Hanel; Rolf Ewers; Helmar Bergmann (Image-Guided Procedures, 2002)

Laboratory assessment of a miniature electromagnetic tracker. - Johann Hummel; Wolfgang Birkfellner; Michael Figl; C. Haider; Rudolf Hanel; Helmar Bergmann (Image-Guided Procedures, 2002)

A Head-Mounted Operating Binocular for Augmented Reality Visualization in Medicine - Design and Initial Evaluation. - Wolfgang Birkfellner; Michael Figl; Klaus Huber; Franz Watzinger; Felix Wanschitz; Johann Hummel; Rudolf Hanel; Wolfgang Greimel; Peter Homolka; Rolf Ewers; Helmar Bergmann (IEEE Trans. Medical Imaging, 2002)

Interactive localisator for percutaneous interventions. - Gernot Kronreif; Martin Fürst; Joachim Kettenbach; Michael Figl; Wolfgang Birkfellner; Rudolf Hanel (CARS, 2003)

Calibration of an optical see-through head-mounted display with variable zoom and focus for applications in computer-assisted interventions. - Michael Figl; Wolfgang Birkfellner; Johann Hummel; Christopher Ede; Rudolf Hanel; Helmar Bergmann (Image-Guided Procedures, 2003)

Navigation system for flexible endoscopes. - Johann Hummel; Michael Figl; Wolfgang Birkfellner; Michael Häfner; Christian Kollmann; Helmar Bergmann (Image-Guided Procedures, 2003)

Robotic guidance for percutaneous interventions. - Gernot Kronreif; Martin Fürst; Joachim Kettenbach; Michael Figl; Rudolf Hanel (Adv. Robotics, 2003)

Evaluation of a robotic targeting device for interventional radiology. - Gernot Kronreif; Joachim Kettenbach; Michael Figl; Ludwig Kleiser; Wolfgang Ptacek; Martin Fürst (CARS, 2004)

Accuracy of the transfer of a preoperative plan from stereolithographic skull models to the patient. - Kurt Schicho; Rolf Ewers; Arne Wagner; Rudolf Seemann; Michael Figl; Julia Fruehwald; Clemens Klug (CARS, 2004)

Automatic calibration of an optical see-through head-mounted display for augmented reality applications in computer-assisted interventions. - Michael Figl; Christopher Ede; Wolfgang Birkfellner; Johann Hummel; Rudolf Seemann; Helmar Bergmann (Image-Guided Procedures, 2004)

Hybrid tracking system for flexible endoscopes. - Johann Hummel; Michael Figl; Wolfgang Birkfellner; Christopher Ede; Rudolf Seemann; Helmar Bergmann (Image-Guided Procedures, 2004)

Fast DRR Generation for 2D/3D Registration. - Wolfgang Birkfellner; Rudolf Seemann; Michael Figl; Johann Hummel; Christopher Ede; Peter Homolka; Xinhui Yang; Peter Niederer; Helmar Bergmann (MICCAI (2), 2005)

Design and automatic calibration of a head mounted operating binocular for augmented reality applications in computer-aided surgery. - Michael Figl; Christopher Ede; Wolfgang Birkfellner; Johann Hummel; Rudolf Hanel; Helmar Bergmann (Image-Guided Procedures, 2005)

Standardized evaluation method for electromagnetic tracking systems. - Johann Hummel; Calvin R. Maurer Jr.; Michael Figl; Michael R. Bax; Helmar Bergmann; Wolfgang Birkfellner; Ramin Shahidi (Image-Guided Procedures, 2005)

A fully automated calibration method for an optical see-through head-mounted operating microscope with variable zoom and focus. - Michael Figl; Christopher Ede; Johann Hummel; Felix Wanschitz; Rolf Ewers; Helmar Bergmann; Wolfgang Birkfellner (IEEE Trans. Medical Imaging, 2005)

Endoscopic navigation system using 2D/3D registration. - Johann Hummel; Michael Figl; Helmar Bergmann; Wolfgang Birkfellner (Image-Guided Procedures, 2006)

3D Reconstruction of Internal Organ Surfaces for Minimal Invasive Surgery. - Mingxing Hu; Graeme P. Penney; Philip J. Edwards; Michael Figl; David J. Hawkes (MICCAI (1), 2007)

Stochastic rank correlation for slice-to-volume registration of fluoroCT/CT imaging. - Wolfgang Birkfellner; Michael Figl; Helmar Bergmann (Image-Guided Procedures, 2007)

Motion correction for radiation therapy of prostate using B-mode ultrasound. - Johann Hummel; Michael Figl; Jörg Schmidbauer; Martina Tinzl; Helmar Bergmann; Wolfgang Birkfellner (Image-Guided Procedures, 2007)

Statistical shape modelling: How many modes should be retained? - Lin Mei; Michael Figl; Daniel Rueckert; Ara Darzi; Philip J. Edwards (CVPR Workshops, 2008)

Sample Sufficiency and PCA Dimension for Statistical Shape Models. - Lin Mei; Michael Figl; Ara Darzi; Daniel Rueckert; Philip J. Edwards (ECCV (4), 2008)

Coronary Motion Modelling for Augmented Reality Guidance of Endoscopic Coronary Artery Bypass. - Michael Figl; Daniel Rueckert; David J. Hawkes; Roberto Casula; Mingxing Hu; Ose Pedro; Dong Ping Zhang; Graeme P. Penney; Fernando Bello; Philip J. Edwards (ISBMS, 2008)

A Novel Algorithm for Heart Motion Analysis Based on Geometric Constraints. - Mingxing Hu; Graeme P. Penney; Daniel Rueckert; Philip J. Edwards; Michael Figl; Philip Pratt; David J. Hawkes (MICCAI (1), 2008)

Sample Sufficiency and Number of Modes to Retain in Statistical Shape Modelling. - Lin Mei; Michael Figl; Daniel Rueckert; Ara Darzi; Philip J. Edwards (MICCAI (1), 2008)

Augmented reality image guidance for minimally invasive coronary artery bypass. - Michael Figl; Daniel Rueckert; David J. Hawkes; Roberto Casula; Mingxing Hu; Ose Pedro; Dong Ping Zhang; Graeme P. Penney; Fernando Bello; Philip J. Edwards (Image-Guided Procedures, 2008)

Non-rigid Reconstruction of the Beating Heart Surface for Minimally Invasive Cardiac Surgery. - Mingxing Hu; Graeme P. Penney; Daniel Rueckert; Philip J. Edwards; Fernando Bello; Roberto Casula; Michael Figl; David J. Hawkes (MICCAI (1), 2009)

Photo-consistency registration of a 4D cardiac motion model to endoscopic video for image guidance of robotic coronary artery bypass. - Michael Figl; Daniel Rueckert; Eddie Edwards (Image-Guided Procedures, 2009)

Evaluation of dynamic electromagnetic tracking deviation. - Johann Hummel; Michael Figl; Michael R. Bax; Ramin Shahidi; Helmar Bergmann; Wolfgang Birkfellner (Image-Guided Procedures, 2009)

A Robust Mosaicing Method for Robotic Assisted Minimally Invasive Surgery. - Mingxing Hu; David J. Hawkes; Graeme P. Penney; Daniel Rueckert; Philip J. Edwards; Fernando Bello; Michael Figl; Roberto Casula (ICINCO (2), 2010)

A Robust Mosaicing Method with Super-Resolution for Optical Medical Images. - Mingxing Hu; Graeme P. Penney; Daniel Rueckert; Philip J. Edwards; Fernando Bello; Michael Figl; Roberto Casula; Yigang Cen; Jie Liu; Zhenjiang Miao (MIAR, 2010)

Correction of prostate misalignment in radiation therapy using US-CT registration. - Rainer Hoffmann 001; Michael Figl; Marcus Kaar; Amon Bhatia; Amar Bhatia; Wolfgang Birkfellner; Johann Hummel (Image-Guided Procedures, 2010)

Measurement of complex joint trajectories using slice-to-volume 2D/3D registration and cine MR. - Christoph Bloch; Michael Figl; Christelle Gendrin; Christoph Weber; Ewald Unger; S. Aldrian; Wolfgang Birkfellner (Image-Guided Procedures, 2010)

A comment on the rank correlation merit function for 2D/3D registration. - Michael Figl; Christoph Bloch; Wolfgang Birkfellner (Image-Guided Procedures, 2010)

Towards real-time 2D/3D registration for organ motion monitoring in image-guided radiation therapy. - Christelle Gendrin; Jakob Spoerk; Christoph Bloch; Supriyanto A. Pawiro; Christoph Weber; Michael Figl; Primoz Markelj; Franjo Pernus; Dietmar Georg; Helmar Bergmann; Wolfgang Birkfellner (Image-Guided Procedures, 2010)

A new gold-standard dataset for 2D/3D image registration evaluation. - Supriyanto A. Pawiro; Primoz Markelj; Christelle Gendrin; Michael Figl; Markus Stock; Christoph Bloch; Christoph Weber; Ewald Unger; Iris Nöbauer; Franz Kainberger; Helga Bergmeister; Dietmar Georg; et al. (Image-Guided Procedures, 2010)

Splint deformation measurement: a contribution to quality control in computer assisted surgery. - Christoph Weber; Michael Figl; Kurt Schicho (Image-Guided Procedures, 2010)

Image guidance for robotic minimally invasive coronary artery bypass. - Michael Figl; Daniel Rueckert; David J. Hawkes; Roberto Casula; Mingxing Hu; Ose Pedro; Dong Ping Zhang; Graeme P. Penney; Fernando Bello; Philip J. Edwards (Comput. Medical Imaging Graph., 2010)

Comparison of two navigation system designs for flexible endoscopes using abdominal 3D ultrasound. - Marcus Kaar; Rainer Hoffmann 001; Helmar Bergmann; Michael Figl; Christoph Bloch; Alfred Kratochwil; Wolfgang Birkfellner; Johann Hummel (Image-Guided Procedures, 2011)

Real-Time Intensity Based 2D/3D Registration for Tumor Motion Tracking During Radiotherapy. - Hugo Furtado; Christelle Gendrin; Christoph Bloch; Jakob Spoerk; Suprianto A. Pawiro; Christoph Weber; Michael Figl; Helmar Bergmann; Markus Stock; Dietmar Georg; Wolfgang Birkfellner (Bildverarbeitung für die Medizin, 2012)

Automatic patient alignment for prostate radiation applying 3D ultrasound. - Marcus Kaar; Alfred Kratochwil; Michael Figl; Rainer Hoffmann 001; Amon Bhatia; Amar Bhatia; Wolfgang Birkfellner; Johann Hummel (Image-Guided Procedures, 2012)

Automatic analysis of ciliary beat frequency using optical flow. - Michael Figl; Manuel Lechner; Tobias Werther; Fritz Horak; Johann Hummel; Wolfgang Birkfellner (Image Processing, 2012)

Real-time 2D/3D registration for tumor motion tracking during radiotherapy. - Hugo Furtado; Christelle Gendrin; Christoph Bloch; Jakob Spoerk; Supriyanto A. Pawiro; Christoph Weber; Michael Figl; Markus Stock; Dietmar Georg; Helmar Bergmann; Wolfgang Birkfellner (Image Processing, 2012)

Reconstruction of a 3D surface from video that is robust to missing data and outliers: Application to minimally invasive surgery using stereo and mono endoscopes. - Mingxing Hu; Graeme P. Penney; Michael Figl; Philip J. Edwards; Fernando Bello; Roberto Casula; Daniel Rueckert; David J. Hawkes (Medical Image Anal., 2012)

Image guidance system for flexible endoscopes considering tissue deformation. - Rainer Hoffmann 001; Michael Figl; Amar Bhatia; Marcus Kaar; Wolfgang Birkfellner; Andreas Püspök; Alfred Kratochwil; Johann B. Hummel (Image-Guided Procedures, 2013)

Evaluation of three 3D US calibration methods. - Johann Hummel; Marcus Kaar; Rainer Hoffmann 001; Amon Bhatia; Wolfgang Birkfellner; Michael Figl (Image-Guided Procedures, 2013)

An error analysis perspective for patient alignment systems. - Michael Figl; Marcus Kaar; Rainer Hoffmann 001; Alfred Kratochwil; Johann Hummel (Int. J. Comput. Assist. Radiol. Surg., 2013)

SPECT-US image fusion and clinical applications. - Johann Hummel; Marcus Kaar; Rainer Hoffmann 001; Wolfgang Birkfellner; Thomas Beyer; Anton Staudenherz; Michael Figl (Image-Guided Procedures, 2014)

New conversion factors between human and automatic readouts of the CDMAM phantom for CR systems. - Johann Hummel; Peter Homolka; Angelika Osanna-Elliot; Marcus Kaar; Friedrich Semtrus; Michael Figl (Image Perception, Observer Performance, and Technology Assessment, 2016)

Ultrasound guidance system for prostate biopsy. - Johann Hummel; Reinhard Kerschner; Marcus Kaar; Wolfgang Birkfellner; Michael Figl (Image-Guided Procedures, 2017)

Design, Implementation, and Evaluation of a Head and Neck MRI RF Array Integrated with a 511 keV Transmission Source for Attenuation Correction in PET/MR. - Lucia I. Navarro de Lara; Roberta Frass-Kriegl; Andreas Renner; Jürgen Sieg; Michael Pichler; Thomas Bogner; Ewald Moser; Thomas Beyer; Wolfgang Birkfellner; Michael Figl; Elmar Laistler (Sensors, 2019)

Error analysis for a navigation system using 3D abdominal ultrasound. - David Iommi; Alejandra Valladares; Michael Figl; Johann Hummel (Image-Guided Procedures, 2020)