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Cardiac Function After Repair of Tetralogy of Fallot: How are the Atria Performing? Pilot Study by Cardiac Magnetic Resonance Imaging

Wohlmuth, C. ; Kellenberger, C. ; Voser, E. ; Burkhardt, B. ; Buechel, E.

In: Pediatric Cardiology, 2015, vol. 36, no. 1, p. 96-105

MR-based attenuation correction for cardiac FDG PET on a hybrid PET/MRI scanner: comparison with standard CT attenuation correction

Vontobel, Jan ; Liga, Riccardo ; Possner, Mathias ; Clerc, Olivier ; Mikulicic, Fran ; Veit-Haibach, Patrick ; ter Voert, Edwin ; Fuchs, Tobias ; Stehli, Julia ; Pazhenkottil, Aju ; Benz, Dominik ; Gräni, Christoph ; Gaemperli, Oliver ; Herzog, Bernhard ; Buechel, Ronny ; Kaufmann, Philipp

In: European Journal of Nuclear Medicine and Molecular Imaging, 2015, vol. 42, no. 10, p. 1574-1580

How much shorter is better? Investigating image acquisition time reduction on left ventricular phase analysis for cardiac dyssynchrony

Prior, John

In: Journal of Nuclear Cardiology, 2015, vol. 22, no. 4, p. 652-654

Assessment of image quality and low-contrast detectability in abdominal CT of obese patients: comparison of a novel integrated circuit with a conventional discrete circuit detector at different tube voltages

Euler, A. ; Heye, T. ; Kekelidze, M. ; Bongartz, G. ; Szucs-Farkas, Z. ; Sommer, C. ; Schmidt, B. ; Schindera, Sebastian

In: European Radiology, 2015, vol. 25, no. 3, p. 687-693

Ultrafast dynamics of the surface photovoltage in potassium-doped black phosphorus

Kremer, Geoffroy ; Rumo, Maxime ; Yue, Changming ; Pulkkinen, Aki ; Nicholson, Christopher W. ; Jaouen, Thomas ; Von Rohr, Fabian ; Werner, Philipp ; Monney, Claude

In: Physical Review B, 2021, vol. 104, no. 3, p. 035125

Black phosphorus is a quasi-two-dimensional layered semiconductor with a narrow direct band gap of 0.3 eV. A giant surface Stark effect can be produced by the potassium doping of black phosphorus, leading to a semiconductor to semimetal phase transition originating from the creation of a strong surface dipole and associated band bending. By using time- and angle-resolved photoemission ...

Ultrafast coupled charge and spin dynamics in strongly correlated NiO

Gillmeister, Konrad ; Golež, Denis ; Chiang, Cheng-Tien ; Bittner, Nikolaj ; Pavlyukh, Yaroslav ; Berakdar, Jamal ; Werner, Philipp ; Widdra, Wolf

In: Nature Communications, 2020, vol. 11, no. 1, p. 4095

Charge excitations across an electronic band gap play an important role in opto- electronics and light harvesting. In contrast to conventional semiconductors, studies of above-band-gap photoexcitations in strongly correlated materials are still in their infancy. Here we reveal the ultrafast dynamics controlled by Hund’s physics in strongly correlated photoexcited NiO. By combining...

Mahan excitons in room-temperature methylammonium lead bromide perovskites

Palmieri, Tania ; Baldini, Edoardo ; Steinhoff, Alexander ; Akrap, Ana ; Kollár, Márton ; Horváth, Endre ; Forró, László ; Jahnke, Frank ; Chergui, Majed

In: Nature Communications, 2020, vol. 11, no. 1, p. 850

In a seminal paper, Mahan predicted that excitonic bound states can still exist in a semiconductor at electron-hole densities above the insulator-to-metal Mott transition. However, no clear evidence for this exotic quasiparticle, dubbed Mahan exciton, exists to date at room temperature. In this work, we combine ultrafast broadband optical spectroscopy and advanced many-body calculations to...

Ultrafast nonequilibrium evolution of excitonic modes in semiconductors

Murakami, Yuta ; Schüler, Michael ; Takayoshi, Shintaro ; Werner, Philipp

In: Physical Review B, 2020, vol. 101, no. 3, p. 035203

We study the time evolution of excitonic states after photoexcitation in the one- dimensional spinless extended Falicov-Kimball model. Several numerical methods are employed and benchmarked against each other: time-dependent mean-field simulations, the second-Born approximation (2BA) within the Kadanoff-Baym formalism, the generalized Kadanoff-Baym ansatz (GKBA) implemented with the 2BA, and...

Postmortem imaging of sudden cardiac death

Michaud, Katarzyna ; Grabherr, Silke ; Jackowski, Christian ; Bollmann, Marc ; Doenz, Franceso ; Mangin, Patrice

In: International Journal of Legal Medicine, 2014, vol. 128, no. 1, p. 127-137

Cardiac hybrid imaging

Gaemperli, Oliver ; Kaufmann, Philipp ; Alkadhi, Hatem

In: European Journal of Nuclear Medicine and Molecular Imaging, 2014, vol. 41, p. 91-103