Department of Radiology - Medical Physics

Publications of ACTIV group members (selected)

Shetty S, Seidenstuecker M, Pichotka M, Pilekic C (2026)
Structural optimization of porous CPC scaffolds and the effect of eliminating the outer wall on mechanical properties for bone regeneration. Frontiers in Mechanical Engineering

Billoud T, Reinacher PC, Weigt M, von Elverfeldt D, Demerath T, Pichotka M (2025)
Detailed imaging of deep brain stimulation leads using micro-CT. Stereotactic and Functional Neurosurgery 103(1): 69–73

Rau S, Pichotka MP, Rau A, Reisert M, Altenburger MJ et al. (2025)
Photon-counting detector CT outperforms CBCT in delineation of dental root canals. Scientific Reports 15: 2978

Weigt M, Helin KHE, Fix NK, Bronsert P, Goldschmidtböing F, Thuering T, Habl M, Gkoumas S, Stein T, Fleing PM, Billoud T, Neubauer J, von Elverfeldt D, Pichotka MP (2025)
Super-resolution radiography by mechanical supersampling and model-based iterative reconstruction using high-Z photon-counting detectors. arXiv:2507.20793

Rau S, Rau A, Lang F, Fink A, Weiss J et al. (2025)
Photon-counting CT outperforms dental CBCT in detecting accessory canals. Scientific Reports 15: 37352

Schuetz MK, Roque G, Useche JS, Procz S, Jakubek J, Pichotka MP et al. (2025)
Optimized data acquisition for spectroscopic CT with Timepix3. Journal of Instrumentation 20(10): P10045

Weigt M, Helin KHE, Fix NK, Bronsert P, Goldschmidtböing F et al. (2025)
Super-resolution radiography using high-Z photon-counting detectors. arXiv:2507.20793

Neubauer J, Wilpert C, Gebler O, Taran FA, Pichotka M et al. (2024)
Diagnostic accuracy of contrast-enhanced thoracic photon-counting CT for breast cancer staging. Investigative Radiology 59(7): 489–494

Wilpert C, Pichotka MP, Molina-Fuentes MF, Weiss J, Bamberg F et al. (2024)
Prone photon-counting CT with iodine mapping for differentiating breast masses. Investigative Radiology

de Maissin H, Groß PR, Mohiuddin O, Weigt M, Nagel L et al. (2023)
In vivo metabolic imaging of hyperpolarized [1-13C] pyruvate-d3. Angewandte Chemie International Edition 62: e202306654

Pichotka MP, Weigt M, Shah MJ, Russe MF, Stein T et al. (2023)
Pilot study on high-resolution imaging of cerebrospinal fluid shunt valves. Zeitschrift für Medizinische Physik

Dermitzakis A, Pichotka M, Petrai A, Weigt M, Pallikarakis N (2023)
3D printed breast phantom materials for X-ray imaging. MEDICON Proceedings

Pichotka M, Billoud T, Carles M, von Elverfeldt D, Grosu A et al. (2022)
Stability of radiomic features under segmentation errors based on multicenter PET/CT phantom data. Nuklearmedizin 61(02): P39

Pichotka M (2022)
Photon-counting detectors – a quantum leap for computed tomography? Zeitschrift für Medizinische Physik 32(3): 257–259

Hasn S, Pichotka M, Dusek K, Vavrik D (2022)
Investigation of BGA underfill processes using multipositional CT. Journal of Instrumentation 17(06): P06037

Neubauer C, Yilmaz JS, Bronsert P, Pichotka M, Bamberg F et al. (2022)
Accuracy of CBCT, mammography and tomosynthesis for microcalcifications in breast specimens. Scientific Reports 12: 17639

Pichotka M, Mix M (2021)
Use of thermoluminescent dosimeters for low-dose measurements. Nuklearmedizin 60(02): V86

Biskup B, Bergmann B, Broulim P, Burian P, Malich M et al. (2021)
Timepix3 detector network for nuclear waste monitoring. EPJ Web of Conferences 253: 07010

Hasn S, Vavrik D, Dusek K, Pichotka M (2020)
μ-CT investigation of tin whisker growth mechanisms. Journal of Instrumentation 15(02): C02043

Pichotka M, Manek P, Bergmann B, Weigt M, Meyer PT et al. (2020)
Development of a hybrid pixel detector-based Compton camera. Nuklearmedizin 59(02): P68

Pichotka M, Weigt M, Hasn S, Meyer PT, von Elverfeldt D et al. (2020)
Hybrid pixel detector technology for medical imaging. Nuklearmedizin 59(02): P24

Hasn S, Vavrik D, Pichotka M (2019)
Improvement of TimePix energy resolution correcting threshold variations. Journal of Instrumentation 14(01): C01010

Billoud T, Leroy C, Papadatos C, Pichotka M, Pospisil S et al. (2018)
Homogeneity study of a GaAs:Cr pixelated sensor by means of X-rays. Journal of Instrumentation 13(04): P04002

Vavřik D, Kytýř D, Muehleder S, Vopálenský M, Beneš P et al. (2018)
High-resolution X-ray micro-CT imaging of fibrin scaffolds using a large-area photon-counting detector. Journal of Instrumentation 13(12): C12006

Kumpová I, Vopálenský M, Fíla T, Kytýř D, Vavřik D et al. (2018)
On-the-fly fast X-ray tomography using a CdTe pixelated detector – application in mechanical testing. IEEE Transactions on Nuclear Science 65(12): 2870–2876

Zat'ko B, Zápražný Z, Jakůbek J, Šagátová A, Boháček P et al. (2018)
Imaging performance of a Timepix detector based on semi-insulating GaAs. Journal of Instrumentation 13(01): C01034

Zat'ko B, Kubanda D, Zemlička J, Šagátová A, Zápražný Z et al. (2018)
First tests of Timepix detectors based on semi-insulating GaAs with different pixel sizes. Journal of Instrumentation 13(02): C02013

Bergmann B, Pichotka M, Pospisil S, Vycpalek J, Burian P et al. (2017)
3D track reconstruction capability of a silicon hybrid active pixel detector. European Physical Journal C 77: 421

Palma KD, Pichotka M, Hasn S, Granja C (2017)
Table-top phase-contrast imaging employing photon-counting detectors towards mammographic applications. Journal of Instrumentation 12(02): C02032

Vavřik D, Jakůbek J, Kumpova I, Pichotka M (2017)
Laboratory-based study of dynamical processes by 4D X-ray CT with sub-second temporal resolution. Journal of Instrumentation 12(02): C02010

Billoud T, Leroy C, Papadatos C, Pichotka M, Pospisil S et al. (2017)
Characterization of a pixelated CdTe Timepix detector operated in ToT mode. Journal of Instrumentation 12(01): P01018

Pichotka M, Palma K, Hasn S, Jakubek J, Vavrik D (2016)
Experimentally enhanced model-based deconvolution of propagation-based phase-contrast data. Journal of Instrumentation 11(12): C12037

Vavřik D, Jandejsek I, Pichotka M (2016)
Correction of X-ray tube spot movement to improve micro-CT image quality. Journal of Instrumentation 11(01): C01029

Vavrik D, Jakubek J, Kumpova I, Pichotka M (2016)
Dual-energy CT inspection of CFRP composites with metal components. Case Studies in Nondestructive Testing and Evaluation 6: 47–55

Gohl S, Bergmann B, Granja C, Owens A, Pichotka M et al. (2016)
Measurement of particle directions in low Earth orbit with a Timepix detector. Journal of Instrumentation 11(11): C11023

Pichotka M, Jakubek J, Vavrik D (2015)
Spectroscopic micro-tomography of metallic-organic composites using photon-counting detectors. Journal of Instrumentation 10(12): C12033

Ballabriga R, Alozy J, Blaj G, Campbell M, Fiederle M et al. (2013)
The Medipix3RX: a high-resolution, zero dead-time pixel detector readout chip allowing spectroscopic imaging. Journal of Instrumentation 8(02): C02016

Walsh MF, Nik SJ, Procz S, Pichotka M, Bell ST et al. (2013)
Spectral CT data acquisition with Medipix3.1. Journal of Instrumentation 8(10): P10012

Procz S, Pichotka M, Lübke J, Hamann E, Ballabriga R et al. (2011)
Flat-field correction optimization for energy-selective X-ray imaging with Medipix3. IEEE Transactions on Nuclear Science 58(6): 3182–3189

Procz S, Lübke J, Zwerger A, Fauler A, Pichotka M et al. (2010)
Energy-selective X-ray imaging with Medipix. IEEE NSS/MIC Conference Proceedings

Pichotka MP (2014)
Iterative CBCT reconstruction algorithms for a spectroscopic Medipix micro-CT. PhD thesis, Albert-Ludwigs-Universität Freiburg