IEAP - Institute of Experimental and Applied Physics

Staff > Krejčí František, Ing., Ph.D.

Krejčí František, Ing., Ph.D.

Department:	Department of applied physics and technology
Position:
Phone number:	+420 224 359 179
E-mail:	frantisek.krejci@utef.cvut.cz
Collaboration:	regular staff

Personal data

Born: March 1984, Boskovice, Czech republic

Education:

2009 - 2014 Faculty of Biomedical Engineering, CTU in Prague (Ph.D.)
2006 - 2008 Faculty of Nuclear Sciences and Physical Engineering, CTU in Prague (MSc.)
2006 - 2010 Masaryk Institute of Advanced Studies, CTU in Prague, Technical Teacher Education (BSc.)
2003 - 2006 Faculty of Nuclear Sciences and Physical Engineering, CTU in Prague (BSc.)
1999 - 2003 High School in Boskovice

Main Research Activities

Imaging techniques based on hybrid semiconductor pixel detectors and ionization radiation (phase contrast imaging with X-rays and neutrons, spatial resolution enhancement techniques, energy sensitive X-ray radiography and CT)
Application of radiation imaging for investigation in biology, material science, cultural heritage studies etc.
Image processing, image reconstruction
Investigation of semiconductor detection structures and their applications
Application of hybrid pixel detector technology for educational purposes

Membership and other activities

Member of IEEE Nuclear and Plasma Sciences Society
Secretary of the Czechoslovakia Section IEEE Nuclear and Plasma Sciences Society
Secretary of the Scientific seminar of the Institute of Experimental and Applied Physics CTU in Prague

Responsible for Grants (5)

676548	BrightnESS - Building a research infrastructure and synergies for highest scientific impact on ESS	H2020	1.10.2015-1.10.2018
15-04987S	Non-destructive methods as a tool for studies on diversity of Cretaceous fossil plants	GAČR	1.1.2015-31.12.2017
TA04011329	Advanced techniques of X-ray radiography for life sciences and industry	TAČR	1.7.2014-31.12.2017
CZ.1.05/3.1.00/14.0301	Universal radiographic system with high contrast and low dose of ionizing radiation	OP VaVPI	1.1.2014-31.12.2014
289198	Advanced Radiation Dosimetry European Network Training initiative	EU	1.2.2012-31.1.2016

Articles in Impacted Journals
(26)

Articles in Conference Proceedings
(13)

Thesis
(3)

Other publications
(1)

All
(43)

Table format

J. Dudák, J. Žemlička, F. Krejčí, J. Karch, M. Patzelt, P. Zach, V. Sykora, . , "Evaluation of sample holders designed for long-lasting X-ray micro-tomographic scans of ex-vivo soft tissue samples", Journal of Instrumentation (2016)

J. Dudák, J. Žemlička, J. Karch, M. Patzelt, J. Mrzílková, P. Zach, Z. Heřmanová, J. Kvacek, F. Krejčí, "High-contrast X-ray micro-radiography and micro-CT of ex-vivo soft tissue murine organs utilizing ethanol fixation and large area photon-counting detector ", Scientific reports 6, 30385 (2016)

J. Karch, F. Krejčí, B. Bartl, J. Dudák, J. Kuba, J. Kvacek, J. Žemlička, "High-contrast X-ray micro-tomography of low attenuation samples using large area hybrid semiconductor pixel detector array of 10 x 5 Timepix chips", Journal of Instrumentation (2016)

J. Karch, B. Bartl, J. Dudák, J. Žemlička, F. Krejčí, "Non-destructive imaging of framents of historical beeswax seals using high-contrast X-ray micro-radiography and micro-tomography with large area photon-counting detector array", Micron (accepted) (2016)

J. Bulantova, T. Machacek, L. Panska, F. Krejčí, J. Karch, N. Jähring, S. Saghafi, H. Dodt, P. Horak, "Trichobilharzia regenti (Schistosomatidae): 3D imaging techniques in characterization of larval migration through the CNS of vertebrates", Micron (2016)

D. Vavřík, J. Jakůbek, I. Jandejsek, F. Krejčí, I. Kumpová, J. Žemlička, "Visualization of delamination in composite materials utilizing advanced X-ray imaging techniques", Journal of Instrumentation 10 C04012 (2015)

J. Dudák, J. Žemlička, F. Krejčí, �. Polanský, J. Jakůbek, J. Mrzílková, M. Patzelt, J. Trnka, "X-ray micro-CT scanner for small animal imaging based on Timepix detector technology", Nucl. Instr. Methods A 773, 81-86 (2015)

F. Krejčí, M. Slavíková, J. Žemlička, J. Jakůbek, P. Kotlík, "High-contrast X-ray Radiography Using Hybrid Semiconductor Pixel Detectors with 1 mm thick Si sensor as a Tool for Monitoring Liquids in Natural Building", Journal of Instrumentation 9 C07014 (2014)

D. Vavřík, M. Holík, J. Jakůbek, M. Jakůbek, V. Kraus, F. Krejčí, P. Soukup, D. Tureček, J. Vacík, J. Žemlička, "Modular pixelated detector system with the spectroscopic capability and fast parallel read-out ", Journal of Instrumentation 9 C06006 (2014)

M. Slavíková, F. Krejčí, P. Kotlík, J. Jakůbek, I. Tomandl, J. Vacík, "Neutron and high-contrast X-ray micro-radiography as complementary tools for monitoring organosilicon consolidants in natural building stones", Nucl. Instr. Methods B: Beam Interactions with Materials and Atoms 338, 42-47 (2014)

F. Krejčí, "X-Ray Phase Contrast Imaging with Hybrid Semiconductor Pixel Detectors", Ph.D. Thesis, Faculty of Biomedical Engineering, CTU in Prague (2014)

I. Jandejsek, J. Jakůbek, M. Jakůbek, P. Průcha, F. Krejčí, P. Soukup, D. Tureček, D. Vavřík, J. Žemlička, "X-ray inspection of composite materials for aircraft structures using detectors of Medipix type", Journal of Instrumentation 9 C05062 (2014)

F. Krejčí, "A method discovering hidden beauty of nature: prestigious awards for Czech scientists from Science magazine (in Czech)", TechniCall 1 (2013)

O. Jiroušek, D. Kytýř, T. Doktor, F. Krejčí, "Displacement tracking in single human trabecula with metal-plated micro-spheres using X-ray radiography imaging", Journal of Instrumentation 8 C02041 (2013)

P. Mikula, M. Vrana, J. Saroun, F. Krejčí, . et. al., "Some properties of the neutron monochromatic beams obtained by multiple Bragg reflections realized in bent perfect single crystals", Applied Crystallography 46, 128-134 (2013)

V. Sýkora, J. Žemlička, F. Krejčí, J. Jakůbek, "X-ray micro-radiography and microscopy of seeds", Science 339 (6119), 511 (2013)

F. Krejčí, J. Jakůbek, M. Slavíková, P. Kotlík, "Application of High-resolution X-Ray Radiography for Monitoring the Penetration Depth of Consolidants in Natural Building Stones ", Engineering Mechanics Conference proceedings, Svratka, Czech Rep., Paper #312, pp. 733–739 (2012)

F. Krejčí, M. Kroupa, J. Jakůbek, P. Brůža, D. Pánek, "Detection of Soft X-rays with the Pixel Detector Timepix operated as a highly sensitive Dark-Current free CCD-like Camera ", 2011 IEEE Nuclear Science Symposium Conference Record, NP5.S-166, 1708 - 1712 (2012)

J. Žemlička, J. Jakůbek, F. Krejčí, D. Hradil, J. Hradilová, H. Mislerová, "Mobile system for in-situ imaging of cultural objects", Journal of Instrumentation 7 C01108 (2012)

F. Krejčí, J. Jakůbek, M. Kroupa, P. Brůža, D. Pánek, "Pixel detector Timepix operated in pile-up mode for pulsed imaging with ultra-soft X-rays", Journal of Instrumentation 7 C12013 (2012)

M. Jakůbek, J. Jakůbek, J. Žemlička, M. Kroupa, F. Krejčí, "Probe and scanning system for 3D response mapping of pixelated semiconductor detector with X-rays and the timepix device", AIP Conf. Proc. 1423, pp. 461-466; doi:10.1063/1.3688846 (2012)

M. Slavíková, F. Krejčí, J. Žemlička, M. Pech, P. Kotlík, J. Jakůbek, "X-ray Radiography and Tomography for Monitoring the Penetration Depth of Consolidants in Opuka - the Building stone of Prague Monuments ", Journal of Cultural Heritage 13 (4), 357-364 (2012)

M. Kroupa, J. Jakůbek, F. Krejčí, J. Žemlička, M. Horáček, T. Radlička, I. Vlček, "Coincidence Imaging System with Electron Optics", Nucl. Instr. Methods A 633, Suppl. 1, S270-S273 (2011)

C. Granja, V. Bočarov, F. Krejčí, P. Mašek, "Experimental study of rare fission decay and time detection of radioactive ions", CTU Workshop (2011) pp. 4

S. Reinhardt, W. Assmann, C. Granja, J. Jakůbek, F. Krejčí, "Investigation of different pixel detectors for laser-driven accelerated particle beams", Radiotherapy and Oncology 99, Suppl. 1 (2011) S154

F. Krejčí, J. Jakůbek, M. Kroupa, V. Jurka, K. Hruška, "Semiconductor pixel detector with absorption grid as a tool for charge sharing studies and energy resolution improvement", Journal of Instrumentation 6 C12034 (2011)

F. Krejčí, J. Jakůbek, M. Kroupa, "Single grating method for low dose 1-D and 2-D phase contrast X-ray imaging", Journal of Instrumentation 6 C01073 (2011)

S. Reinhardt, C. Granja, F. Krejčí, W. Assmann, "Test of pixel detectors for laser-driven accelerated particle beams", Journal of Instrumentation 6 C12030 (2011)

M. Kroupa, Z. Janout, M. Králík, F. Krejčí, A. Owens, S. Pospíšil, F. Quarati, J. Šolc, "Wide Energy Range Gamma-Ray Calibration Facility", IEEE NSS/MIC Knoxville Conf. Record (2011)

M. Kroupa, C. Granja, Z. Janout, M. Králík, F. Krejčí, A. Owens, S. Pospíšil, F. Quarati, J. Šolc, M. Vobecký, "Wide Energy Range Gamma-Ray Calibration Source", Journal of Instrumentation 6 T11002 (2011)

F. Krejčí, J. Jakůbek, M. Kroupa, "X-ray Phase Contrast Imaging Using Single Absorption Coded Aperture", Nucl. Instr. Methods A 633, Suppl. 1, 181 - 184 (2011)

P. Vrba, M. Vrbová, P. Brůža, D. Pánek, F. Krejčí, M. Kroupa, J. Jakůbek, "XUV radiation from gaseous nitrogen and argon target laser plasmas ", Journal of Physics: Conference Series (2011)

F. Krejčí, J. Jakůbek, M. Kroupa, " Hard x-ray phase contrast imaging using single absorption grating and hybrid semiconductor pixel detector", Rev. Sci. Instrum. 81, 113702 (2010)

F. Krejčí, J. Jakůbek, M. Kroupa, "Low dose X-ray phase contrast imaging sensitive to phase effects in 2-D ", IEEE NSS/MIC/RTSD Knoxville Conf. Record M09-166, doi: 10.1109/NSSMIC.2010.5874172

F. Krejčí, J. Jakůbek, M. Kroupa, "New approach in phase contrast X-ray imaging using coded aperture", 11th ICATPP Conference, Villa Olmo - Como (Italy), 5-9 October 2009, ISBN 10 981-4307-51-2, pp. 59 – 63 (2010)

M. Kroupa, J. Jakůbek, F. Krejčí, "Non-Contact Imaging with Enhanced Spatial Resolution by Secondary Electron Detection", IEEE NSS/MIC Knoxville Conf. Record, page 462-463, doi: 10.1109/NSSMIC.2010.5873803

M. Kroupa, J. Jakůbek, F. Krejčí, "Non-contact Electron optics System for Coincidence Imaging analysis", 11th ICATPP Conference, Villa Olmo - Como (Italy), 5-9 October 2009, ISBN 10 981-4307-51-2, pp. 631 – 635 (2010)

F. Krejčí, "Series of Laboratory Exersices in the Physics of the Microworld", BSc. Thesis, Masaryk Institute of Advanced Studies, CTU in Prague (2010)

F. Krejčí, J. Jakůbek, J. Dammer, D. Vavřík, "Enhancement of spatial resolution of roentgenographic methods", Nucl. Instr. Methods A 607, Issue 1, 208-211 (2009)

M. Kroupa, J. Jakůbek, F. Krejčí, "Charge Collection Characterization with Semiconductor Pixel Detector Timepix", IEEE NSS/MIC/RTSD Conf. Proc. (2008) R12-37

F. Krejčí, J. Jakůbek, M. Kroupa, J. Dammer, D. Vavřík, "Enhancement of Spatial Resolution of Roentgenographic Methods Using Deconvolution", IEEE NSS/MIC Conf. Proc. (2008) M06-315

F. Krejčí, J. Jakůbek, "Enhancement of spatial resolution of roentgenographic methods", Proceedings Workshop CTU Prague Vol. 12 (2008). FYZ 026

F. Krejčí, "Enhancement of spatial resolution of roentgenographic methods", MSc. Thesis, Faculty of Nuclear Sciences and Physical Engineering, CTU in Prague (2008)