Th Flohr

Summary

Affiliation: Siemens Medical Solutions
Country: USA

Publications

  1. ncbi request reprint Dose performance of a 64-channel dual-source CT scanner
    Cynthia H McCollough
    CT Clinical Innovation Center, Department of Radiology, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905, USA
    Radiology 243:775-84. 2007
  2. ncbi request reprint New technical developments in multislice CT--Part 1: Approaching isotropic resolution with sub-millimeter 16-slice scanning
    T Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Rofo 174:839-45. 2002
  3. ncbi request reprint Novel ultrahigh resolution data acquisition and image reconstruction for multi-detector row CT
    T G Flohr
    Siemens Medical Solutions, Computed Tomography CTE PA Siemensstr 1, 91301 Forchheim, Germany
    Med Phys 34:1712-23. 2007
  4. ncbi request reprint Image reconstruction and image quality evaluation for a dual source CT scanner
    T G Flohr
    Computed Tomography, Siemens Healthcare, 91301 Forchheim, Germany
    Med Phys 35:5882-97. 2008
  5. ncbi request reprint Image reconstruction and image quality evaluation for a 64-slice CT scanner with z-flying focal spot
    T G Flohr
    Siemens Medical Solutions, Computed Tomography Forchheim, Germany
    Med Phys 32:2536-47. 2005
  6. ncbi request reprint First performance evaluation of a dual-source CT (DSCT) system
    Thomas G Flohr
    Siemens Medical Solutions, Computed Tomography CTE PA, Siemensstr 1, 91301, Forchheim, Germany
    Eur Radiol 16:256-68. 2006
  7. doi request reprint Pushing the envelope: new computed tomography techniques for cardiothoracic imaging
    Thomas G Flohr
    Siemens Healthcare, Computed Tomography Division, Forchheim, Germany
    J Thorac Imaging 25:100-11. 2010
  8. ncbi request reprint Chasing the heart: new developments for cardiac CT
    Thomas G Flohr
    Siemens Medical Solutions, Forchheim, Germany
    J Thorac Imaging 22:4-16. 2007
  9. doi request reprint Cardiac CT: how much can temporal resolution, spatial resolution, and volume coverage be improved?
    Thomas G Flohr
    Siemens Healthcare, CT PLM E PA, Forchheim, Germany
    J Cardiovasc Comput Tomogr 3:143-52. 2009
  10. ncbi request reprint Dual-source spiral CT with pitch up to 3.2 and 75 ms temporal resolution: image reconstruction and assessment of image quality
    Thomas G Flohr
    Siemens Healthcare, Computed Tomography, 91301 Forchheim, Germany
    Med Phys 36:5641-53. 2009

Detail Information

Publications40

  1. ncbi request reprint Dose performance of a 64-channel dual-source CT scanner
    Cynthia H McCollough
    CT Clinical Innovation Center, Department of Radiology, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905, USA
    Radiology 243:775-84. 2007
    ..To prospectively compare the dose performance of a 64-channel multi-detector row computed tomographic (CT) scanner and a 64-channel dual-source CT scanner from the same manufacturer...
  2. ncbi request reprint New technical developments in multislice CT--Part 1: Approaching isotropic resolution with sub-millimeter 16-slice scanning
    T Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Rofo 174:839-45. 2002
    ..Clinical practice will have to demonstrate the application spectrum that is opened with the new generation of multislice CT systems...
  3. ncbi request reprint Novel ultrahigh resolution data acquisition and image reconstruction for multi-detector row CT
    T G Flohr
    Siemens Medical Solutions, Computed Tomography CTE PA Siemensstr 1, 91301 Forchheim, Germany
    Med Phys 34:1712-23. 2007
    ....
  4. ncbi request reprint Image reconstruction and image quality evaluation for a dual source CT scanner
    T G Flohr
    Computed Tomography, Siemens Healthcare, 91301 Forchheim, Germany
    Med Phys 35:5882-97. 2008
    ..Finally, they show that the smoothness of the transition between image stacks acquired in different cardiac cycles can be efficiently controlled with the proposed approach for ECG-synchronized image reconstruction...
  5. ncbi request reprint Image reconstruction and image quality evaluation for a 64-slice CT scanner with z-flying focal spot
    T G Flohr
    Siemens Medical Solutions, Computed Tomography Forchheim, Germany
    Med Phys 32:2536-47. 2005
    ..5, in this way increasing the maximum volume coverage speed that can be clinically used...
  6. ncbi request reprint First performance evaluation of a dual-source CT (DSCT) system
    Thomas G Flohr
    Siemens Medical Solutions, Computed Tomography CTE PA, Siemensstr 1, 91301, Forchheim, Germany
    Eur Radiol 16:256-68. 2006
    ..As a potential application of the dual-energy acquisition mode, the automatic separation of bones and iodine-filled vessels is demonstrated...
  7. doi request reprint Pushing the envelope: new computed tomography techniques for cardiothoracic imaging
    Thomas G Flohr
    Siemens Healthcare, Computed Tomography Division, Forchheim, Germany
    J Thorac Imaging 25:100-11. 2010
    ....
  8. ncbi request reprint Chasing the heart: new developments for cardiac CT
    Thomas G Flohr
    Siemens Medical Solutions, Forchheim, Germany
    J Thorac Imaging 22:4-16. 2007
    ....
  9. doi request reprint Cardiac CT: how much can temporal resolution, spatial resolution, and volume coverage be improved?
    Thomas G Flohr
    Siemens Healthcare, CT PLM E PA, Forchheim, Germany
    J Cardiovasc Comput Tomogr 3:143-52. 2009
    ..In this article, we review the current status and discuss potential further improvements and limitations of system parameters relevant for cardiac CT, in particular spatial resolution, temporal resolution, and volume coverage...
  10. ncbi request reprint Dual-source spiral CT with pitch up to 3.2 and 75 ms temporal resolution: image reconstruction and assessment of image quality
    Thomas G Flohr
    Siemens Healthcare, Computed Tomography, 91301 Forchheim, Germany
    Med Phys 36:5641-53. 2009
    ..To present the theory for image reconstruction of a high-pitch, high-temporal-resolution spiral scan mode for dual-source CT (DSCT) and evaluate its image quality and dose...
  11. ncbi request reprint [On the way to isotopic spatial resolution: technical principles and applications of 16-slice CT]
    T Flohr
    Computed Tomography, Siemens Medical Solutions, Forchheim
    Radiologe 45:608-17. 2005
    ..16-slice CT-systems have the potential to cover even large scan ranges with sub-millimeter slices at considerably reduced examination times, thus approaching the goal of routine isotropic imaging...
  12. ncbi request reprint Performance evaluation of a 64-slice CT system with z-flying focal spot
    T Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Rofo 176:1803-10. 2004
    ..Cardiac scanning benefits from the short gantry rotation time of 0.33 s, providing up to 83 ms temporal resolution with 2-segment ECG-gated reconstruction...
  13. ncbi request reprint New technical developments in multislice CT, part 2: sub-millimeter 16-slice scanning and increased gantry rotation speed for cardiac imaging
    T Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Rofo 174:1022-7. 2002
    ..Clinical experience will be needed to fully evaluate the potential of 16-slice technology for cardiac imaging...
  14. ncbi request reprint Performance evaluation of a multi-slice CT system with 16-slice detector and increased gantry rotation speed for isotropic submillimeter imaging of the heart
    Thomas Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Herz 28:7-19. 2003
    ..We evaluate advances in ECG-gated scanning of the heart and the coronary arteries with recently introduced 16-slice CT equipment (SOMATOM Sensation 16, Siemens, Forchheim, Germany)...
  15. ncbi request reprint [Current status and future potentials of multislice computed tomography]
    T Flohr
    Division CT, Siemens Medical Solutions Forchheim
    Radiologe 44:113-20. 2004
    ..Combined systems such as CT PET scanners will gain increasing importance in the near future. In general radiology the race for more slices will continue, finally leading to the introduction of CT systems with area-detectors...
  16. ncbi request reprint Image reconstruction and performance evaluation for ECG-gated spiral scanning with a 16-slice CT system
    Th Flohr
    Siemens Medical Solutions, Computed Tomography, Forchheim, Germany
    Med Phys 30:2650-62. 2003
    ..A 16-slice platform can cover the heart with sub-mm slices within short breath-hold times, allowing for improved cardiac imaging due to isotropic sub-mm spatial resolution...
  17. ncbi request reprint Coronary calcium scoring using 16-row multislice computed tomography: nonenhanced versus contrast-enhanced studies in vitro and in vivo
    Georg Mühlenbruch
    Department of Diagnostic Radiology, University Hospital RWTH Aachen, Germany
    Invest Radiol 40:148-54. 2005
    ..We sought to assess the agreement of coronary artery calcium score in nonenhanced and contrast-enhanced multislice-spiral computed tomography...
  18. ncbi request reprint Image quality and reconstruction intervals of dual-source CT coronary angiography: recommendations for ECG-pulsing windowing
    Sebastian Leschka
    Institute of Diagnostic Radiology, University Hospital Zurich, Zurich, Switzerland
    Invest Radiol 42:543-9. 2007
    ..To evaluate reconstruction intervals and image quality in dual-source computed tomography (DSCT) coronary angiography for optimal placement of the ECG-pulsing window...
  19. ncbi request reprint Dual-source CT coronary angiography: image quality, mean heart rate, and heart rate variability
    David Matt
    Institute of Diagnostic Radiology, University Hospital Zurich, Raemistrasse 100, 8091 Zurich, Switzerland
    AJR Am J Roentgenol 189:567-73. 2007
    ..The purpose of this study was to evaluate the effect of mean heart rate and heart rate variability on the image quality of dual-source CT coronary angiography...
  20. ncbi request reprint Coronary artery motion and cardiac phases: dependency on heart rate -- implications for CT image reconstruction
    Lars Husmann
    Institute of Diagnostic Radiology and Cardiovascular Center, University Hospital Zurich, Raemistrasse 100, CH 8091, Zurich, Switzerland
    Radiology 245:567-76. 2007
    ..001), leading to percentage reconstruction interval shifts of coronary velocity troughs and peaks (P < .01). Results suggest that image reconstruction algorithms at CT coronary angiography be adapted to the individual patient's HR...
  21. ncbi request reprint Radiation dose estimates in dual-source computed tomography coronary angiography
    Paul Stolzmann
    Institute of Diagnostic Radiology, University Hospital Zurich, Raemistrasse 100, 8091 Zurich, Switzerland
    Eur Radiol 18:592-9. 2008
    ..When using a protocol with reduced tube current of 4%, the radiation dose is significantly lower, irrespective of the heart rate...
  22. pmc Measurement of temporal resolution in dual source CT
    Cynthia H McCollough
    Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA
    Med Phys 35:764-8. 2008
    ..A demonstration of the effect of the evaluated 165 and 83 ms nominal temporal resolutions on motion artifacts in cardiac CT is provided using patient data...
  23. doi request reprint Optimal electrocardiographic pulsing windows and heart rate: effect on image quality and radiation exposure at dual-source coronary CT angiography
    Annick C Weustink
    Department of Radiology, Erasmus Medical Center, PO Box 2040, Room Hs 218, 3000 CA Rotterdam, The Netherlands
    Radiology 248:792-8. 2008
    ....
  24. doi request reprint Dual-source CT in step-and-shoot mode: noninvasive coronary angiography with low radiation dose
    Paul Stolzmann
    Institute of Diagnostic Radiology, University Hospital Zurich, Raemistrasse 100, CH 8091 Zurich, Switzerland
    Radiology 249:71-80. 2008
    ....
  25. ncbi request reprint Advances in cardiac imaging with 16-section CT systems
    Thomas G Flohr
    Siemens Medical Solutions, CTC CF, Siemensstrasse 1, D 91301 Forchheim, Germany
    Acad Radiol 10:386-401. 2003
    ..The authors present advances in electrocardiographically (ECG) gated cardiac spiral scanning with recently introduced 16-section computed tomographic (CT) equipment...
  26. ncbi request reprint Multi-detector row CT versus coronary angiography: preoperative evaluation before totally endoscopic coronary artery bypass grafting
    Christopher Herzog
    Institute for Diagnostic and Interventional Radiology, J W Goethe University Frankfurt, Theodor Stern Kai 7, 60590 Frankfurt, Germany
    Radiology 229:200-8. 2003
    ....
  27. ncbi request reprint Does two-segment image reconstruction at 64-section CT coronary angiography improve image quality and diagnostic accuracy?
    Christopher Herzog
    Department of Radiology, Medical University of South Carolina, 169 Ashley Ave, Charleston, SC 29425, USA
    Radiology 244:121-9. 2007
    ....
  28. ncbi request reprint Multi-detector row CT systems and image-reconstruction techniques
    Thomas G Flohr
    Siemens Medical Solutions, CT Division, Forchheim, Germany
    Radiology 235:756-73. 2005
    ..Finally, the evolutionary steps from traditional single-section spiral image-reconstruction algorithms to the most recent approaches toward multisection spiral reconstruction are traced...
  29. ncbi request reprint Individually adapted examination protocols for reduction of radiation exposure for 16-MDCT chest examinations
    Marco Das
    Department of Diagnostic Radiology, University Hospital, University of Technology RWTH, Pauwelsstrasse 30, D 52074 Aachen, Germany
    AJR Am J Roentgenol 184:1437-43. 2005
    ..The purpose of our study was to develop a simple protocol for reduction of radiation exposure without loss of diagnostic information in chest 16-MDCT...
  30. ncbi request reprint CT for imaging coronary artery disease: defining the paradigm for its application
    Bernd M Ohnesorge
    Division CT, Siemens Medical Solutions, Medical University of South Carolina, Charleston, SC 29425, USA
    Int J Cardiovasc Imaging 21:85-104. 2005
    ..This communication discusses potential approaches for the beneficial utilization of MDCT for the assessment of patients with known or suspected coronary heart disease...
  31. ncbi request reprint A new algorithm for metal artifact reduction in computed tomography: in vitro and in vivo evaluation after total hip replacement
    Andreas H Mahnken
    Department of Diagnostic Radiology, Aachen University of Technology, Germany
    Invest Radiol 38:769-75. 2003
    ..To evaluate a newly developed algorithm for metal artifact reduction (MAR) in Computed Tomography (CT)...
  32. ncbi request reprint Global left ventricular function in cardiac CT. Evaluation of an automated 3D region-growing segmentation algorithm
    Georg Mühlenbruch
    Department of Diagnostic Radiology, University Hospital RWTH Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany
    Eur Radiol 16:1117-23. 2006
    ..2%. On the basis of a good contrast-enhanced data set, a left ventricular volume analysis using the new semi-automated region-growing segmentation algorithm is technically feasible, accurate and more time-effective...
  33. ncbi request reprint Improving diagnostic accuracy of MDCT coronary angiography in patients with mild heart rhythm irregularities using ECG editing
    Filippo Cademartiri
    Department of Radiology, Erasmus Medical Center, Dr Molewaterplein, 40, Rotterdam 3015GD, The Netherlands
    AJR Am J Roentgenol 186:634-8. 2006
    ..The objective of our study was to compare diagnostic accuracy of MDCT coronary angiography in a population of patients with mild heart rhythm irregularities before and after editing the ECG...
  34. ncbi request reprint [Non-invasive 16-row spiral multislice computed tomography coronary angiography after one year of experience]
    Filippo Cademartiri
    Dipartimento di Radiologia, Erasmus Medical Center, Dr Molenwaterplein, 40 3015 GD Rotterdam, The Netherlands
    Ital Heart J Suppl 4:587-93. 2003
    ....
  35. ncbi request reprint Thick maximum intensity projections for the assessment of left ventricular function with 64-slice computed tomography
    Lars Husmann
    Institute of Diagnostic Radiology, University of Zurich, Zurich, Switzerland
    Invest Radiol 41:746-52. 2006
    ....
  36. ncbi request reprint Current concepts in multi-detector row CT evaluation of the coronary arteries: principles, techniques, and anatomy
    Harpreet K Pannu
    Russell H Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD, USA
    Radiographics 23:S111-25. 2003
    ..The challenges of CT angiography of the coronary arteries have been partially met and will likely be overcome with continued evolution of the technology...
  37. ncbi request reprint Variability of aortic valve calcification measurement with multislice spiral computed tomography
    Karl M Ruhl
    Department of Diagnostic Radiology, RWTH Aachen University, Germany
    Invest Radiol 41:370-3. 2006
    ..We sought to assess the variability of aortic valve calcifications (AVCs) regarding the reconstruction window at different heart phases using multislice-spiral computed tomography...
  38. pmc Dual-source computed tomography in patients with acute chest pain: feasibility and image quality
    Thomas Schertler
    Department of Medical Radiology, Institute of Diagnostic Radiology, University Hospital Zurich, Raemistrasse 100CH 8091, Zurich, Switzerland
    Eur Radiol 17:3179-88. 2007
    ..DSCTA is feasible and provides diagnostic image quality of the thoracic aorta, pulmonary and coronary arteries in patients with acute chest pain...
  39. ncbi request reprint Aortic regurgitation: assessment with 64-section CT
    Hatem Alkadhi
    Institute of Diagnostic Radiology, Clinic for Cardiovascular Surgery, and Cardiovascular Center, University Hospital Zurich, Raemistrasse 100, CH 8091 Zurich, Switzerland
    Radiology 245:111-21. 2007
    ..To prospectively evaluate diagnostic accuracy of 64-section computed tomography (CT) for evaluation of aortic regurgitation (AR), with transthoracic echocardiography (TTE) as reference...
  40. ncbi request reprint Small pulmonary nodules: effect of two computer-aided detection systems on radiologist performance
    Marco Das
    Department of Diagnostic Radiology, Institute of Medical Statistics, and Department of Occupational Health, Rheinisch Westfälische Technische Hochschule Aachen University, Pauwelsstrasse 30, D 52074 Aachen, Germany
    Radiology 241:564-71. 2006
    ..To prospectively compare the effects of two computer-aided detection (CAD) systems on the detection of small pulmonary nodules at multi-detector row computed tomography (CT) by using a consensus panel decision as the reference standard...