Dr. Daniel Kolditz, Dipl.-Ing. (FH)

phone +49-(0)9131-85-25542
daniel.kolditz@imp.uni-erlangen.de

 

Work areas :

•  Dedicated CT of the Female Breast (Breast CT)

•  C-Arm Flat-Detector CT (FDCT)

•  CT Physics, Simulations and Reconstruction Algorithms

•  CT Image Quality and Dose

•  Volume-of-Interest (VOI) Imaging

•  Shifted-Detector and Large-Volume Imaging

 

Publications

 

  • A.-C. Rössler, M. Hupfer, D. Kolditz, G. Jost, H. Pietsch, and W. A. Kalender.High Atomic Number Contrast Media Offer Potential for Radiation Dose Reduction in Contrast-Enhanced Computed Tomography. Investigative Radiology 51.4:249-254, 2016. DOI: http://dx.doi.org/10.1097/RLI.0000000000000232

  • J. D. Kuttig, C. Steiding, M. Hupfer, M. Karolczak, and D. Kolditz. Effects of defect pixel correction algorithms for x-ray detectors on image quality in planar projection and volumetric CT data sets. Measurement Science and Technology 26.9:095406, 2015. DOI: http://dx.doi.org/10.1088/0957-0233/26/9/095406

  • J. D. Kuttig, C. Steiding, D. Kolditz, M. Hupfer, M. Karolczak, and W. A. Kalender. Comparative investigation of the detective quantum efficiency of direct and indirect conversion detector technologies in dedicated breast CT. Physica Medica 31.4:406-413, 2015. DOI: http://dx.doi.org/10.1016/j.ejmp.2015.03.007

  • W. A. Kalender, N. Saltybaeva, D. Kolditz, M. Hupfer, M. Beister, and B. Schmidt. Generating and using patient-specific whole-body models for organ dose estimates in CT with increased accuracy: Feasibility and validation. Physica Medica 30.8:925-933, 2014. DOI: http://dx.doi.org/10.1016/j.ejmp.2014.09.005

  • C. Steiding, D. Kolditz, and W. A. Kalender. Comparison of Methods for Acceptance and Constancy Testing in Dental Cone-beam Computed Tomography. Fortschr. Röntgenstr. 187:283-290, 2015. DOI: http://dx.doi.org/10.1055/s-0034-1385333

  • F. Lück, D. Kolditz, M. Hupfer, C. Steiding, and W. A. Kalender. Experimental validation of a single shaped filter approach for CT using variable source-to-filter distance for examination of arbitrary object diameters. Physics in Medicine and Biology 59.19:5691, 2014. DOI: http://dx.doi.org/10.1088/0031-9155/59/19/5691

  • F. Lück, F. Althoff, D. Kolditz, H. Schilling, and M. Hupfer. Optimierter Formfilter für CT. Patent DE102012024961A1, 2014.

  • C. Steiding, D. Kolditz, and W. A. Kalender. A quality assurance framework for the fully automated and objective evaluation of image quality in cone-beam computed tomography. Medical Physics 41.3:031901, 2014.DOI: http://dx.doi.org/10.1118/1.4863507

  • B. Schmidt, N. Saltybaeva, D. Kolditz, and W. A. Kalender. Assessment of patient dose from CT localizer radiographs. Med. Phys. 40:084301, 2013. DOI: http://dx.doi.org/10.1118/1.4813296

  • F. Lück, D. Kolditz, M. Hupfer, and W. A. Kalender. Effect of shaped filter design on dose and image quality in breast CT. Phys. Med. Biol. 58:4205-4223, 2913. DOI: http://dx.doi.org/10.1088/0031-9155/58/12/4205

  • Chen, D. Kolditz , M. Beister, R. Bohle and W. A. Kalender. Fast on-site Monte Carlo tool for dose calculations in CT applications. Med. Phys. 36:2985-2996, 2012. DOI: http://dx.doi.org/10.1118/1.4711748
  • R. Brauweiler, F. Eisa, M. Hupfer, T. Nowak, D. Kolditz and W. A. Kalender. Development and evaluation of a phantom for dynamic contrast-enhanced imaging. Invest. Radiol. , 2012, 47:462-467, 2012.
    DOI: http://dx.doi.org/10.1097/RLI.0b013e318250a72c

  • M. Beister, D. Kolditz and W. A. Kalender. Iterative reconstruction methods in X-ray CT. Physica Medica - European Journal of Medical Physics 28:94-108, 2012. DOI: http://dx.doi.org/10.1016/j.ejmp.2012.01.003

  • I. Yohannes, D. Kolditz , O. Langner and W. A Kalender. A formulation of tissue- and water-equivalent materials using the stoichiometric analysis method for CT-number calibration in radiotherapy treatment planning. Phys. Med. Biol. 57:1173-1190, 2012. DOI: http://dx.doi.org/10.1088/0031-9155/57/5/1173

  • M. Hupfer, D. Kolditz , T. Nowak, F. Eisa, R. Brauweiler and W. A Kalender. Dosimetric concepts for scanner quality assurance and tissue dose assessment in micro-CT. Med. Phys. 39:658-670, 2012. DOI: http://dx.doi.org/10.1118/1.3675400

  • D. Kolditz, T. Struffert, Y. Kyriakou, A. Bozzato, A. Dörfler, and W. A. Kalender. Volume-of-interest (VOI) imaging of the inner ear in a human temporal bone specimen using a robot-driven C-arm flat-detector CT system. AJNR Am. J. Neuroradiol., 2012, in press. DOI:http://dx.doi.org/10.3174/ajnr.A2577

  • W. A. Kalender, M. Beister, J. M. Boone, D. Kolditz , S. V. Vollmar and M. Weigel. High-resolution spiral CT of the breast at very low dose: Concept and feasibility considerations. Eur. Radiol. 22:1-8, 2012.
    DOI: http://dx.doi.org/10.1007/s00330-011-2169-4

  • I. Yohannes, D. Kolditz and W. A. Kalender. Semiempirical analysis of materials' elemental composition to formulate tissue-equivalent materials: a preliminary study. Phys. Med. Biol. 56:2963-2977, 2011.
    DOI: http://dx.doi.org/10.1088/0031-9155/56/10/005

  • D. Kolditz, M. Meyer, Y. Kyriakou, and W. A. Kalender. Comparison of extended field-of-view reconstructions in C-arm flat-detector CT using patient size, shape, or attenuation information. Phys. Med. Biol. , 56(1):39-56, 2011
    DOI: http://dx.doi.org/10.1088/0031-9155/56/1/003

  • D. Kolditz. Verfahren zur Korrektur von Messfeldüberschreitungen in der Flachdetektor-Computertomographie, PhD Thesis, Institute of Medical Physics, Friedrich -Alexander-University Erlangen-Nürnberg, 2010
    URL: http://www.opus.ub.uni-erlangen.de/opus/volltexte/2011/2494/

  • Y. Kyriakou, D. Kolditz, O. Langner, J. Krause, and W. A. Kalender. Digitale Volumentomografie (DVT) und Mehrschicht-Spiral-CT (MSCT): eine objektive Untersuchung von Dosis und Bildqualität. Digital volume tomography (DVT) and multislice spiral CT (MSCT): an objective examination of dose and image quality. Fortschr. Röntgenstr. 183:144-153, 2011.
    DOI: http://dx.doi.org/10.1055/s-0029-1245709

  • D. Kolditz, Y. Kyriakou, and W. A. Kalender. Volume of interest (VOI) imaging in C-arm flat-detector CT for high image quality at reduced dose. Med. Phys. , 37(6):2719-2730, 2010. DOI: http://dx.doi.org/10.1118/1.3427641

  • D. Kolditz, Y. Kyriakou, and W. A. Kalender. Low dose, low noise and high resolution volume of interest (VOI) imaging in C-arm flat-detector CT. Proc. SPIE , 7622:762226, 2010. DOI: http://dx.doi.org/10.1117/12.844129

  • D. Kolditz. Konzeptstudie über ein externes Positionsverifikationssystem in der Partikeltherapie. Diploma Thesis, Georg Simon Ohm University of Applied Sciences Nürnberg, 2008 .

 

Conference contributions

 

  • A.-C. Rössler, E. Wenkel, C. Steiding, V. Ruth, S. Kratz, R. Schultz-Wendtland, C. Preuss, D. Kolditz, and W. A. Kalender. Photon-counting breast CT (pcBCT) performance tests on specimens in comparison with digital mammography and breast tomosynthesis. European Congress of Radiology (ECR) 2016, 2 - 6 March 2016, Vienna, Austria. DOI: http://dx.doi.org/10.1594/ecr2016/C-0367

  • D. Kolditz, V. Ruth, A. Schwab, M. Beister, and W. A. Kalender. Metal Artifact Reduction in Computed Tomography using Computer-Aided Design Data of Metallic Implants as Prior Information. Annual Meeting of Radiological Society of North America (RSNA) 2015, 29 November - 4 December 2012, Chicago, USA

  • W. A. Kalender, D. Kolditz, M. Hupfer, A. C. Rössler, R. Schulz-Wendtland, and P. Fasching. Dedicated high-resolution breast CT allows imaging micro-calcifications down to 130 µm at screening mammography dose levels. Annual Meeting of Radiological Society of North America (RSNA) 2015, 29 November - 4 December 2012, Chicago, USA

  • Z. Jiang, M. Beister, C. Steiding, D. Kolditz, and W. A. Kalender. Fast Implementation of the Katsevich Reconstruction Algorithm for Dedicated Breast CT. Annual Meeting of Radiological Society of North America (RSNA) 2015, 29 November - 4 December 2012, Chicago, USA

  • V. Ruth, D. Kolditz, A. Schwab, M. Beister, and W. A. Kalender. Metallartefaktreduktion in der Computertomografie unter Nutzung von Computer-Aided Designdaten metallischer Implantate als Vorinformation. 46. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik (DGMP) e. V. 2015, 09 - 12 September 2015, Marburg, Germany

  • A. Schwab, D. Kolditz, M. Hupfer, M. Beister, and W. A. Kalender. Eine Monte Carlo basierte Methode zur Streustrahlenartefaktreduktion in der Brust-Computertomografie. 46. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik (DGMP) e. V. 2015, 09 - 12 September 2015, Marburg, Germany

  • S. V. Vollmar, D. Kolditz, M. Hupfer, and W. A. Kalender. Dose to Organs and Tissues from Scattered Radiation in Breast CT: Impact on Effective Dose. Annual Meeting of Radiological Society of North America (RSNA) 2014, 30 November - 05 December 2014, Chicago, USA

  • M. Hupfer, N. Saltybaeva, D. Kolditz, B. Schmidt, and W. A. Kalender. Fast and Easy Estimates of Dose from Localizer Radiographs in Clinical CT Based on Pre-Calculated Monte Carlo Tables. Annual Meeting of Radiological Society of North America (RSNA) 2014, 30 November - 05 December 2014, Chicago, USA

  • J. D. Kuttig, C. Steiding, D. Kolditz, and W. A. Kalender. Detective Quantum Efficiency Investigation Demonstrates High Dose Saving Potential for Breast CT Using a Cadmium Telluride Detector. Annual Meeting of Radiological Society of North America (RSNA) 2014, 30 November - 05 December 2014, Chicago, USA

  • C. Steiding, D. Kolditz, F. Althoff, and W. A. Kalender. Fully Automated Geometric Calibration of a Tiled Directly-converting Single X-ray Photon Counting Detector Array for CT. Annual Meeting of Radiological Society of North America (RSNA) 2014, 30 November - 05 December 2014, Chicago, USA

  • C. Steiding, D. Kolditz, and W. A. Kalender. Comparison of different methods for assessing imaging performance in dental cone-beam computed tomography. Joint Conference of the SSRMP, DGMP, OGMP - Dreiländertagung der Medizinischen Physik 2014, 7 - 10 September 2014, Zurich, Switzerland

  • C. Steiding, D. Kolditz, A.-C. Rössler, and W. A. Kalender. Quantitative assessment of the spatial dependence of non-stationary high-contrast spatial resolution, low-contrast detectability, and noise behavior in 3D imaging of the breast. European Congress of Radiology (ECR) 2014, 6 - 10 March 2014, Vienna, Austria

  • N. Saltybaeva, B. Schmidt, D. Kolditz, and W. A. Kalender. Assessment of patient dose from CT localizer radiographs. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • N. Saltybaeva, D. Kolditz, and W. A. Kalender. Patient-specific whole-body voxel models for accurate organ and effective dose estimation. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • N. Saltybaeva, M. Hupfer, D. Kolditz, B. Schmidt, and Willi A. Kalender. Fast and easy dose estimates including tube current modulation and automatic exposure control. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • A.-C. Rößler, C. Steiding, D. Kolditz, E. Wenkel, R. Schultz-Wendtland, and W. A. Kalender. Objective evaluation of low-contrast detectability and high-contrast resolution for different breast imaging modalities by means of breast simulating phantoms with arbitrary positionable inserts. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • F. Lück, D. Kolditz, M. Hupfer, and Willi A. Kalender. Experimental validation of shaped filter design with variable source-to-filter distance for breast CT. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • W. A. Kalender, D. Kolditz, A.-C. Rößler, C. Steiding, E. Wenkel, and R. Schultz-Wendtland. Dedicated high-resolution breast CT can outperform digital mammography and breast tomosynthesis at equivalent dose levels. Annual Meeting of Radiological Society of North America (RSNA) 2013, 1 - 6 December 2013, Chicago, USA.

  • N. Saltybaeva, Y. Smal, D. Kolditz, and W. A. Kalender. Patient-specific whole-body voxel model for accurate Monte Carlo CT dose estimation. European Congress of Radiology (ECR) 2013, 7 - 11 March 2013, Vienna, Austria.
    N, Saltybaeva, D. Kolditz, B. Schmidt, and W. A. Kalender. Monte Carlo tool for 3D-dose simulation in computed tomography taking into account tube current modulation. European Congress of Radiology (ECR) 2013, 7 - 11 March 2013, Vienna, Austria.

  • D. Kolditz, N. Saltybaeva, R. Bohle, and W. A. Kalender. Evaluation of non-cylindrical quality phantoms for tube current modulation and automatic exposure control. Annual Meeting of Radiological Society of North America (RSNA) 2012, 25 - 30 November 2012, Chicago, USA.

  • M. Beister, D. Kolditz, and W. A. Kalender. Metal-artifact reduction in computed tomography using model-based iterative reconstruction with spectral modeling. Annual Meeting of Radiological Society of North America (RSNA) 2012, 25 - 30 November 2012, Chicago, USA.

  • R. Bohle, D. Kolditz, N. Saltybaeva, F. Lück, B. Schmidt, and Willi A. Kalender. Comparison of CT dose calculations using either exact shaped filter information or the intensity function which results from ionization chamber measurements. Annual Meeting of Radiological Society of North America (RSNA) 2012, 25 - 30 November 2012, Chicago, USA.

  • C. Steiding, D. Kolditz, and W. A. Kalender. A quality assurance framework for the automated performance evaluation of digital volume tomography (DVT) systems. Annual Meeting of Radiological Society of North America (RSNA) 2012, 25 - 30 November 2012, Chicago, USA.

  • C. Steiding, D. Kolditz, and W. A. Kalender. Verfahren zur automatisierten Quantifizierung der Bildqualität in der Digitalen Volumentomographie (DVT) mit dem Ziel einer vereinfachten Abnahme- und Konstanzprüfung. 43. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik (DGMP) 2012, 26 - 29 September 2012, Jena, Germany.

  • R. Brauweiler, F. Eisa, M. Hupfer, T. Nowak, D. Kolditz and W. A. Kalender. Functional imaging on an interventional C-arm at detector CT system. European Congress of Radiology (ECR) 2012 , 1 - 5 March 2012, Vienna, Austria.

  • D. Kolditz , M. Beister and W. A Kalender. Volume-of-interest imaging for high image quality at reduced dose in dedicated female breast CT. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • M. Beister, R. Hendrych, D. Kolditz and W. A. Kalender. Dose efficient model-based iterative reconstruction for a dedicated female breast CT scanner. Annual Meeting of Radiological Society of North America (RSNA) 2011, 27 November - 2 December 2011, Chicago, USA .

  • W. Chen, D. Kolditz , M. Hupfer, Y. Smal and W. A. Kalender. Implementation and validation of a real time Monte Carlo software tool for patient-specific dose calculations. Annual Meeting of Radiological Society of North America (RSNA) 2011, 27 November - 2 December 2011, Chicago, USA .

  • M. Hupfer, T. Nowak, D. Kolditz , F. Eisa, R. Brauweiler and W. A. Kalender. Dosimetry in micro-CT. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • F. Lück, M. Weigel, D. Kolditz , S. V. Vollmar, M. Hupfer and W. A. Kalender.Effect of shaped filters designed for breast CT on dose and image quality. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • Y. Smal, W. Chen, D. Kolditz , B. Schmidt and W. A. Kalender. Fast and on-line estimation of CT dose for pediatric patients. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • Y. Smal, W. Chen, D. Kolditz , C. S. Reis and W. A. Kalender. Conversion of the dose-length product into effective dose taking recent ICRP recommendations into account. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • I. Yohannes, D. Kolditz , O. Langner and W. A. Kalender. Semiempirical method to formulate tissue-equivalent materials for calibration and quality assurance in CT and radiotherapy. Annual Meeting of Radiological Society of North America (RSNA) 2011 , 27 November - 2 December 2011, Chicago, USA .

  • D. Kolditz . Wieder Neues vom CT. 32. Jahrestagung der Bayerischen Gesellschaft für Nuklearmedizin (BGN) 2011 , 1 - 2 July 2011, Erlangen, Germany

  • D. Kolditz, Y. Kyriakou, and W. A. Kalender. Extended field-of-view reconstruction in C-arm flat-detector CT by using patient size and shape information from an optical camera system. Annual Meeting of Radiological Society of North America (RSNA) 2010 , 28 November - 3 December 2010, Chicago, USA.

  • R. Lapp, D. Kolditz, and W. A. Kalender. OrthoMIT Teilprojekt 8: Bildqualitätsoptimierung, Dosisreduktion und neue Anwendungen für die intraoperative CT-Bildgebung. 44. Jahrestagung der Deutschen Gesellschaft für Biomedizinische Technik (DGBMT) 2010 , 6 - 8 October 2010, Rostock, Germany .

  • M. Wucherer, L. Wucherer, R. Simmler, T. Hertlein, I. Yohannes, D. Kolditz, and W. A. Kalender. Phantommaterial für Qualitätssicherung des Gesamtsystems in der Strahlentherapie. 41. Jahrestagung der Deutschen Gesellschaft für Medizinische Physik (DGMP) 2010 , 29 September - 2 October 2010, Freiburg, Germany.

  • D. Kolditz, Y. Kyriakou, and W. A. Kalender, “Low dose, low noise and high resolution volume of interest (VOI) imaging in C-arm flat-detector CT,” Proc. SPIE – SPIE Medical Imaging Conference 2010, 13 - 18 February 2010, San Diego, USA, 7622:762226, 2010. DOI: http://dx.doi.org/10.1117/12.844129

  • D. Kolditz, Y. Kyriakou, and W. A. Kalender “Truncation correction based on patient size estimation for extended field of view (EFOV) reconstructions in C-arm flat-detector CT,” Annual Meeting of Radiological Society of North America (RSNA) 2009, 27 November - 04 December 2009, Chicago, USA, 2009.

  • D. Kolditz, M. Meyer, Y. Kyriakou, E. Rietzel, and W. A. Kalender “Impact of truncation correction in flat-detector computed tomography on carbon ion radiotherapy treatment planning,” IFMBE Proceedings – World Congress 2009 on Medical Physics and Biomedical Engineering, 7 - 12 September 2009, Munich, Germany, pages 385-388, 2009.
    DOI: http://dx.doi.org/10.1007/978-3-642-03474-9_108