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Landesberger V, Grenzebach K, Schreiber F, Nowak D, Gröger M, Oppel E, Schaub B, French LE, Kutzora S, Quartucci C, Herr C, Heinze S. Conception and pilot testing of a self-management health application for patients with pollen-related allergic rhinitis and allergic asthma-the APOLLO app. Sci Rep 2023; 13:21568. [PMID: 38057347 PMCID: PMC10700582 DOI: 10.1038/s41598-023-48540-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 11/28/2023] [Indexed: 12/08/2023] Open
Abstract
It has been shown that pollen information services are an important self-management tool for patients with pollen-related allergic rhinitis (AR) and allergic asthma (AA). This study aimed to design an online application for patients with AR and AA, which supports patients to better manage their disease as well as to evaluate the app and present the first results of the pilot study. The pollen data were obtained from the electronic pollen information network of Bavaria, Germany. Participants were asked to fill in their allergy-related complaints in the app over a 60-day period. Subsequently, the app was evaluated. Indices and diagrams visualized the participants' individual complaints as well as the daily pollen concentration in the air. In order to motivate participants to complete the app on a daily basis, we used elements of gamification. Two thirds of the participants (N = 46) reported feeling better informed about pollen counts and their allergy when using the app. The app's simple and comprehensible design was rated positively. More than 80% of the participants would recommend the app to their family and friends. The app can be a tool for patients with AR and AA to better understand their disease.
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Affiliation(s)
- V Landesberger
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - K Grenzebach
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - F Schreiber
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - D Nowak
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center (CPC) Munich, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - M Gröger
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
| | - E Oppel
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - B Schaub
- LMU Munich, University Children's Hospital, Munich, Germany
- Member of the German Center of Lung Research (DZL), Munich, Germany
| | - L E French
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - S Kutzora
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany.
| | - C Quartucci
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center (CPC) Munich, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - C Herr
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center (CPC) Munich, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - S Heinze
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center (CPC) Munich, Member of the German Center of Lung Research (DZL), Munich, Germany
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Tcakaev A, Rubrecht B, Facio JI, Zabolotnyy VB, Corredor LT, Folkers LC, Kochetkova E, Peixoto TRF, Kagerer P, Heinze S, Bentmann H, Green RJ, Gargiani P, Valvidares M, Weschke E, Haverkort MW, Reinert F, van den Brink J, Büchner B, Wolter AUB, Isaeva A, Hinkov V. Intermixing-Driven Surface and Bulk Ferromagnetism in the Quantum Anomalous Hall Candidate MnBi 6 Te 10. Adv Sci (Weinh) 2023; 10:e2203239. [PMID: 36802132 PMCID: PMC10074120 DOI: 10.1002/advs.202203239] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 01/17/2023] [Indexed: 06/18/2023]
Abstract
The recent realizations of the quantum anomalous Hall effect (QAHE) in MnBi2 Te4 and MnBi4 Te7 benchmark the (MnBi2 Te4 )(Bi2 Te3 )n family as a promising hotbed for further QAHE improvements. The family owes its potential to its ferromagnetically (FM) ordered MnBi2 Te4 septuple layers (SLs). However, the QAHE realization is complicated in MnBi2 Te4 and MnBi4 Te7 due to the substantial antiferromagnetic (AFM) coupling between the SLs. An FM state, advantageous for the QAHE, can be stabilized by interlacing the SLs with an increasing number n of Bi2 Te3 quintuple layers (QLs). However, the mechanisms driving the FM state and the number of necessary QLs are not understood, and the surface magnetism remains obscure. Here, robust FM properties in MnBi6 Te10 (n = 2) with Tc ≈ 12 K are demonstrated and their origin is established in the Mn/Bi intermixing phenomenon by a combined experimental and theoretical study. The measurements reveal a magnetically intact surface with a large magnetic moment, and with FM properties similar to the bulk. This investigation thus consolidates the MnBi6 Te10 system as perspective for the QAHE at elevated temperatures.
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Affiliation(s)
- Abdul‐Vakhab Tcakaev
- Physikalisches Institut (EP‐IV)Universität WürzburgAm HublandD‐97074WürzburgGermany
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
| | - Bastian Rubrecht
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
| | - Jorge I. Facio
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
- Centro Atómico BarilocheInstituto de Nanociencia y Nanotecnología (CNEA‐CONICET) and Instituto Balseiro. Av. Bustillo 9500Bariloche8400Argentina
| | - Volodymyr B. Zabolotnyy
- Physikalisches Institut (EP‐IV)Universität WürzburgAm HublandD‐97074WürzburgGermany
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
| | - Laura T. Corredor
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
| | - Laura C. Folkers
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Institut für Festkörper‐ und MaterialphysikTechnische Universität DresdenD‐01062DresdenGermany
| | - Ekaterina Kochetkova
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
| | - Thiago R. F. Peixoto
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Physikalisches Institut (EP‐VII)Universität WürzburgAm HublandD‐97074WürzburgGermany
| | - Philipp Kagerer
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Physikalisches Institut (EP‐VII)Universität WürzburgAm HublandD‐97074WürzburgGermany
| | - Simon Heinze
- Institute for Theoretical PhysicsHeidelberg UniversityPhilosophenweg 1969120HeidelbergGermany
| | - Hendrik Bentmann
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Physikalisches Institut (EP‐VII)Universität WürzburgAm HublandD‐97074WürzburgGermany
| | - Robert J. Green
- Department of Physics and Astronomy and Stewart Blusson Quantum Matter InstituteUniversity of British ColumbiaVancouverBritish ColumbiaV6T 1Z4Canada
- Department of Physics and Engineering PhysicsUniversity of SaskatchewanSaskatoonSKS7N 5E2Canada
| | - Pierluigi Gargiani
- ALBA Synchrotron Light SourceE‐08290 Cerdanyola del VallèsBarcelonaSpain
| | - Manuel Valvidares
- ALBA Synchrotron Light SourceE‐08290 Cerdanyola del VallèsBarcelonaSpain
| | - Eugen Weschke
- Helmholtz‐Zentrum Berlin für Materialien und EnergieAlbert‐Einstein‐Straße 15D‐12489BerlinGermany
| | - Maurits W. Haverkort
- Institute for Theoretical PhysicsHeidelberg UniversityPhilosophenweg 1969120HeidelbergGermany
| | - Friedrich Reinert
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Physikalisches Institut (EP‐VII)Universität WürzburgAm HublandD‐97074WürzburgGermany
| | - Jeroen van den Brink
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
- Institut für Theoretische PhysikTechnische Universität DresdenD‐01062DresdenGermany
| | - Bernd Büchner
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
- Institut für Festkörper‐ und MaterialphysikTechnische Universität DresdenD‐01062DresdenGermany
| | - Anja U. B. Wolter
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
| | - Anna Isaeva
- Leibniz Institut für Festkörper‐ und Werkstoffforschung (IFW) DresdenHelmholtzstraße 20D‐01069DresdenGermany
- Van der Waals‐Zeeman InstituteDepartment of Physics and AstronomyUniversity of AmsterdamScience Park 904Amsterdam1098 XHThe Netherlands
| | - Vladimir Hinkov
- Physikalisches Institut (EP‐IV)Universität WürzburgAm HublandD‐97074WürzburgGermany
- Würzburg‐Dresden Cluster of Excellence ct.qmatGermany
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Schiefer H, Heinze S, Glatzer M. A precise and simple isodose-volume-based verification method for HDR and LDR brachytherapy plans. Brachytherapy 2023; 22:400-406. [PMID: 36635203 DOI: 10.1016/j.brachy.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 12/19/2022] [Accepted: 12/19/2022] [Indexed: 01/12/2023]
Abstract
PURPOSE The American Association of Physicists in Medicine (AAPM) code of practice for brachytherapy physics recommends performing an independent treatment time calculation. For this we implemented an easy to use isodose-based verification method for HDR (high-dose-rate) and LDR (low-dose-rate) brachytherapy plans. MATERIAL AND METHODS Dose-volume-based methods have been developed for Ir-192-based high-dose-rate (HDR) and I-125 prostate low-dose-rate (LDR) brachytherapy. They allow checking the integral dwell time or activity when the volume of a suitable isodose is known. The verification method was validated for 55 clinical HDR and 243 clinical LDR plans. RESULTS For HDR brachytherapy, the mean absolute difference between the estimated and calculated integral dwell time was 0.8% ± 1.0% (n = 30) with a single-source path and 2.7% ± 1.1% (n = 25) for multiple source paths. The corresponding value for LDR brachytherapy was 1.8% ± 2.0% (n = 243). In HDR brachytherapy, the verification method depends slightly on the plan class when considering one or more than one source paths. Good agreement between the estimated and calculated integral dwell times was obtained based on the 2 Gy isodose. Unlike HDR brachytherapy, the parameters used in the verification method for LDR brachytherapy plan verification strongly depend on the type of seed distribution. So, we recommend using an isodose at the prescribed dose for prostate HDR therapy. CONCLUSIONS Isodose-based verification methods are precise, do not presuppose dedicated tools, and are simple to implement in clinical practice.
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Affiliation(s)
- H Schiefer
- Department of Radiation Oncology, Kantonsspital St.Gallen, St.Gallen, Switzerland.
| | - S Heinze
- Department of Radiation Oncology, Kantonsspital St.Gallen, St.Gallen, Switzerland
| | - M Glatzer
- Department of Radiation Oncology, Kantonsspital St.Gallen, St.Gallen, Switzerland
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Wehrse E, Klein L, Rotkopf LT, Stiller W, Finke M, Echner G, Glowa C, Heinze S, Ziener CH, Schlemmer HP, Kachelrieß M, Sawall S. Ultrahigh resolution whole body photon counting computed tomography as a novel versatile tool for translational research from mouse to man. Z Med Phys 2022:S0939-3889(22)00066-6. [PMID: 35868888 DOI: 10.1016/j.zemedi.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/18/2022] [Accepted: 06/19/2022] [Indexed: 11/19/2022]
Abstract
X-ray computed tomography (CT) is a cardinal tool in clinical practice. It provides cross-sectional images within seconds. The recent introduction of clinical photon-counting CT allowed for an increase in spatial resolution by more than a factor of two resulting in a pixel size in the center of rotation of about 150 µm. This level of spatial resolution is in the order of dedicated preclinical micro-CT systems. However so far, the need for different dedicated clinical and preclinical systems often hinders the rapid translation of early research results to applications in men. This drawback might be overcome by ultra-high resolution (UHR) clinical photon-counting CT unifying preclinical and clinical research capabilities in a single machine. Herein, the prototype of a clinical UHR PCD CT (SOMATOM CounT, Siemens Healthineers, Forchheim, Germany) was used. The system comprises a conventional energy-integrating detector (EID) and a novel photon-counting detector (PCD). While the EID provides a pixel size of 0.6 mm in the centre of rotation, the PCD provides a pixel size of 0.25 mm. Additionally, it provides a quantification of photon energies by sorting them into up to four distinct energy bins. This acquisition of multi-energy data allows for a multitude of applications, e.g. pseudo-monochromatic imaging. In particular, we examine the relation between spatial resolution, image noise and administered radiation dose for a multitude of use-cases. These cases include ultra-high resolution and multi-energy acquisitions of mice administered with a prototype bismuth-based contrast agent (nanoPET Pharma, Berlin, Germany) as well as larger animals and actual patients. The clinical EID provides a spatial resolution of about 9 lp/cm (modulation transfer function at 10%, MTF10%) while UHR allows for the acquisition of images with up to 16 lp/cm allowing for the visualization of all relevant anatomical structures in preclinical and clinical specimen. The spectral capabilities of the system enable a variety of applications previously not available in preclinical research such as pseudo-monochromatic images. Clinical ultra-high resolution photon-counting CT has the potential to unify preclinical and clinical research on a single system enabling versatile imaging of specimens and individuals ranging from mice to man.
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Affiliation(s)
- E Wehrse
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
| | - L Klein
- Department of Physics and Astronomy, Heidelberg University, Heidelberg, Germany; Division of X-ray Imaging and CT, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - L T Rotkopf
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - W Stiller
- Diagnostic and Interventional Radiology (DIR), Heidelberg University Hospital, Heidelberg, Germany
| | - M Finke
- Diagnostic and Interventional Radiology (DIR), Heidelberg University Hospital, Heidelberg, Germany
| | - G Echner
- Division of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Heidelberg, Germany
| | - C Glowa
- Division of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Department of Radiation Oncology and Radiotherapy, University Hospital Heidelberg, Heidelberg, Germany; Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Heidelberg, Germany
| | - S Heinze
- Institute of Forensic and Traffic Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - C H Ziener
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - H-P Schlemmer
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - M Kachelrieß
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany; Division of X-ray Imaging and CT, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - S Sawall
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany; Division of X-ray Imaging and CT, German Cancer Research Center (DKFZ), Heidelberg, Germany.
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Rupprecht P, Aufleger L, Heinze S, Magunia A, Ding T, Rebholz M, Amberg S, Mollov N, Henrich F, Haverkort MW, Ott C, Pfeifer T. Laser Control of Electronic Exchange Interaction within a Molecule. Phys Rev Lett 2022; 128:153001. [PMID: 35499899 DOI: 10.1103/physrevlett.128.153001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/01/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Electronic interactions play a fundamental role in atoms, molecular structure and reactivity. We introduce a general concept to control the effective electronic exchange interaction with intense laser fields via coupling to excited states. As an experimental proof of principle, we study the SF_{6} molecule using a combination of soft x-ray and infrared (IR) laser pulses. Increasing the IR intensity increases the effective exchange energy of the core hole with the excited electron by 50%, as observed by a characteristic spin-orbit branching ratio change. This work demonstrates altering electronic interactions by targeting many-particle quantum properties.
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Affiliation(s)
- Patrick Rupprecht
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Lennart Aufleger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Simon Heinze
- Institut für theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany
| | - Alexander Magunia
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Thomas Ding
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Marc Rebholz
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Stefano Amberg
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Nikola Mollov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Felix Henrich
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Maurits W Haverkort
- Institut für theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany
| | - Christian Ott
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
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Sawall S, Klein L, Wehrse E, Rotkopf LT, Amato C, Maier J, Schlemmer HP, Ziener CH, Heinze S, Kachelrieß M. Threshold-dependent iodine imaging and spectral separation in a whole-body photon-counting CT system. Eur Radiol 2021; 31:6631-6639. [PMID: 33713171 PMCID: PMC8379121 DOI: 10.1007/s00330-021-07786-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/20/2021] [Accepted: 02/12/2021] [Indexed: 11/01/2022]
Abstract
OBJECTIVE To evaluate the dual-energy (DE) performance and spectral separation with respect to iodine imaging in a photon-counting CT (PCCT) and compare it to dual-source CT (DSCT) DE imaging. METHODS A semi-anthropomorphic phantom extendable with fat rings equipped with iodine vials is measured in an experimental PCCT. The system comprises a PC detector with two energy bins (20 keV, T) and (T, eU) with threshold T and tube voltage U. Measurements using the PCCT are performed at all available tube voltages (80 to 140 kV) and threshold settings (50-90 keV). Further measurements are performed using a conventional energy-integrating DSCT. Spectral separation is quantified as the relative contrast media ratio R between the energy bins and low/high images. Image noise and dose-normalized contrast-to-noise ratio (CNRD) are evaluated in resulting iodine images. All results are validated in a post-mortem angiography study. RESULTS R of the PC detector varies between 1.2 and 2.6 and increases with higher thresholds and higher tube voltage. Reference R of the EI DSCT is found as 2.20 on average overall phantoms. Maximum CNRD in iodine images is found for T = 60/65/70/70 keV for 80/100/120/140 kV. The highest CNRD of the PCCT is obtained using 140 kV and is decreasing with decreasing tube voltage. All results could be confirmed in the post-mortem angiography study. CONCLUSION Intrinsically acquired DE data are able to provide iodine images similar to conventional DSCT. However, PCCT thresholds should be chosen with respect to tube voltage to maximize image quality in retrospectively derived image sets. KEY POINTS • Photon-counting CT allows for the computation of iodine images with similar quality compared to conventional dual-source dual-energy CT. • Thresholds should be chosen as a function of the tube voltage to maximize iodine contrast-to-noise ratio in derived image sets. • Image quality of retrospectively computed image sets can be maximized using optimized threshold settings.
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Affiliation(s)
- S Sawall
- Division of X-Ray Imaging and CT, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany. .,Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.
| | - L Klein
- Division of X-Ray Imaging and CT, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,Department of Physics and Astronomy, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 226, 69120, Heidelberg, Germany
| | - E Wehrse
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.,Division of Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - L T Rotkopf
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.,Division of Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - C Amato
- Division of X-Ray Imaging and CT, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany
| | - J Maier
- Division of X-Ray Imaging and CT, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - H-P Schlemmer
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.,Division of Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - C H Ziener
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.,Division of Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - S Heinze
- Institute of Forensic and Traffic Medicine, University Hospital Heidelberg, Voßstraße 2, 69115, Heidelberg, Germany
| | - M Kachelrieß
- Division of X-Ray Imaging and CT, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,Medical Faculty, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany
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7
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Wehrse E, Klein L, Rotkopf LT, Wagner WL, Uhrig M, Heußel CP, Ziener CH, Delorme S, Heinze S, Kachelrieß M, Schlemmer HP, Sawall S. Photon-counting detectors in computed tomography: from quantum physics to clinical practice. Radiologe 2021; 61:1-10. [PMID: 33598788 DOI: 10.1007/s00117-021-00812-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2021] [Indexed: 12/19/2022]
Abstract
Over the last decade, a fundamentally new type of computed tomography (CT) detectors has proved its superior capabilities in both physical and preclinical evaluations and is now approaching the stage of clinical practice. These detectors are able to discriminate single photons and quantify their energy and are hence called photon-counting detectors. Among the promising benefits of this technology are improved radiation dose efficiency, increased contrast-to-noise ratio, reduced metal artifacts, improved spatial resolution, simultaneous multi-energy acquisitions, and the prospect of multi-phase imaging within a single acquisition using multiple contrast agents. Taking the conventional energy-integrating detectors as a reference, the authors demonstrate the technical principles of this new technology and provide phantom and patient images acquired by a whole-body photon-counting CT. These images serve as a basis for discussing the potential future of clinical CT.
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Affiliation(s)
- E Wehrse
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany.
| | - L Klein
- Division of X-Ray Imaging and Computed Tomography, German Cancer Research Center, Heidelberg, Germany
| | - L T Rotkopf
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - W L Wagner
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
- Translational Lung Research Center Heidelberg, German Center for Lung Research, Heidelberg, Germany
| | - M Uhrig
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - C P Heußel
- Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
- Translational Lung Research Center Heidelberg, German Center for Lung Research, Heidelberg, Germany
- Diagnostic and Interventional Radiology with Nuclear Medicine, Thoraxklinik, University of Heidelberg, Heidelberg, Germany
| | - C H Ziener
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - S Delorme
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - S Heinze
- Institute of Forensic and Traffic Medicine, University Hospital Heidelberg, Voßstraße 2, 69115, Heidelberg, Germany
| | - M Kachelrieß
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
- Division of X-Ray Imaging and Computed Tomography, German Cancer Research Center, Heidelberg, Germany
| | - H-P Schlemmer
- Division of Radiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - S Sawall
- Medical Faculty, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
- Division of X-Ray Imaging and Computed Tomography, German Cancer Research Center, Heidelberg, Germany
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8
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Li W, Paul S, von Bergmann K, Heinze S, Wiesendanger R. Stacking-Dependent Spin Interactions in Pd/Fe Bilayers on Re(0001). Phys Rev Lett 2020; 125:227205. [PMID: 33315450 DOI: 10.1103/physrevlett.125.227205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/23/2020] [Indexed: 06/12/2023]
Abstract
Using spin-polarized scanning tunneling microscopy and density functional theory, we have studied the magnetic properties of Pd/Fe atomic bilayers on Re(0001). Two kinds of magnetic ground states are discovered due to different types of stacking of the Pd adlayer on Fe/Re(0001). For fcc stacking of Pd on Fe/Re(0001), it is a spin spiral propagating along the close-packed (ΓK[over ¯]) direction with a period of about 0.9 nm, driven by frustrated exchange and Dzyaloshinskii-Moriya interactions. For the hcp stacking, the four-site four-spin interaction stabilizes an up-up-down-down state propagating perpendicular to the close-packed direction (along ΓM[over ¯]) with a period of about 1.0 nm. Our work shows how higher-order exchange interactions can be tuned at interfaces.
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Affiliation(s)
- W Li
- Department of Physics, University of Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany
| | - S Paul
- Institute of Theoretical Physics and Astrophysics, University of Kiel, Leibnizstrasse 15, 24098 Kiel, Germany
| | - K von Bergmann
- Department of Physics, University of Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany
| | - S Heinze
- Institute of Theoretical Physics and Astrophysics, University of Kiel, Leibnizstrasse 15, 24098 Kiel, Germany
| | - R Wiesendanger
- Department of Physics, University of Hamburg, Jungiusstrasse 9-11, 20355 Hamburg, Germany
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9
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Sawall S, Klein L, Amato C, Wehrse E, Dorn S, Maier J, Heinze S, Schlemmer HP, Ziener C, Uhrig M, Kachelrieß M. Iodine contrast-to-noise ratio improvement at unit dose and contrast media volume reduction in whole-body photon-counting CT. Eur J Radiol 2020; 126:108909. [DOI: 10.1016/j.ejrad.2020.108909] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/09/2020] [Accepted: 02/14/2020] [Indexed: 10/25/2022]
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10
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Heinze S, Lagkouvardos I, Liebl W, Schwarz WH, Kornberger P, Zverlov VV. Draft Genome Sequence of Paenibacillus polymyxa DSM 292, a Gram-Positive, Spore-Forming Soil Bacterium with High Biotechnological Potential. Microbiol Resour Announc 2020; 9:e00071-20. [PMID: 32165383 PMCID: PMC7067951 DOI: 10.1128/mra.00071-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 02/24/2020] [Indexed: 11/20/2022] Open
Abstract
Paenibacillus polymyxa DSM 292 was originally isolated from soil in 1947 due to its ability to produce antibiotics. The low proteolytic properties of strain DSM 292 warrant its examination as a host for heterologous protein production. Here, we report the draft genome sequence of DSM 292 as established by Illumina MiSeq paired-end sequencing.
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Affiliation(s)
- Simon Heinze
- Department of Microbiology, Technical University of Munich, Freising, Germany
| | - Ilias Lagkouvardos
- ZIEL Institute for Food and Health, Technical University of Munich, Freising, Germany
| | - Wolfgang Liebl
- Department of Microbiology, Technical University of Munich, Freising, Germany
| | | | - Petra Kornberger
- Department of Microbiology, Technical University of Munich, Freising, Germany
| | - Vladimir V Zverlov
- Department of Microbiology, Technical University of Munich, Freising, Germany
- Institute of Molecular Genetics, Russian Academy of Science, Moscow, Russia
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11
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Dammeyer AH, Heinze S, Adler AC, Nasri L, Schomacher L, Zamfir M, Heigl K, Karlin B, Franitza M, Hörmansdorfer S, Tuschak C, Valenza G, Ochmann U, Herr C. Clinical relevance of colonization with antimicrobial-resistant bacteria (AMRB) and methicillin susceptible Staphylococcus aureus (MSSA) for mothers during pregnancy. Arch Gynecol Obstet 2019; 300:1303-1316. [PMID: 31531777 DOI: 10.1007/s00404-019-05287-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022]
Abstract
PURPOSE The impact of colonization with antimicrobial-resistant bacteria (AMRB) and methicillin-sensitive Staphylococcus aureus (MSSA) of healthy pregnant women is not described in detail in Germany. In this study, we screened for MSSA and AMRB, especially for methicillin-resistant S. aureus (MRSA) as well as extended-spectrum beta-lactamase (ESBL)-producing E. coli. Potential risk factors for colonization with AMRB/MSSA and the potential effects of colonization with these on the obstetric population were investigated. METHODS From October 2013 until December 2015 pregnant women were screened before birth for colonization with AMRB/MSSA from the mammillae, nose, perianal and vaginal area. Before birth, the expectant mother was administered a standardized interview questionnaire by a trained interviewer. Data from the hospital admission records were also included. RESULTS Samples from 651 pregnant women were analyzed. Colonization with MSSA was detected in 14.3% (n = 93), AMRB in 3.5% [(n = 23); MRSA: n = 3/ESBL: n = 20]. Significantly more colonization of AMRB/MSSA could be detected in women who had previously given birth compared to women who were nulliparous (p < 0.05). MSSA colonization was significantly associated with self-reported respiratory diseases during pregnancy (p < 0.05), but AMRB/MSSA colonization was not statistically associated with other types of infection. CONCLUSION Our results demonstrate a low overall rate of colonization with AMRB/MSSA, as well as a low percentage of colonized pregnant women who developed infections. Multiparous women are at higher risk for colonization with MSSA/MRSA or ESBL. Because the prevalence of AMRB/MSSA is low, this study suggests that general screening of pregnant women without risk factors is not recommended.
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Affiliation(s)
- A H Dammeyer
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany.
| | - S Heinze
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany.,Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Clinic of the University of Munich, Munich, Germany
| | - A C Adler
- Bavarian State Ministry of Public Health and Care Services, Munich, Germany
| | - L Nasri
- Klinikum Augsburg, Women's Clinic, Augsburg, Germany
| | - L Schomacher
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - M Zamfir
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - K Heigl
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - B Karlin
- Rotkreuzklinikum München, Women's Clinic, Munich, Germany
| | - M Franitza
- Klinikum Augsburg, Women's Clinic, Augsburg, Germany
| | - S Hörmansdorfer
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - C Tuschak
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - G Valenza
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany
| | - U Ochmann
- Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Clinic of the University of Munich, Munich, Germany
| | - C Herr
- Bavarian Health and Food Safety Authority, Munich/Oberschleißheim/Erlangen, Germany.,Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Clinic of the University of Munich, Munich, Germany
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12
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Moustakis C, Chan M, Kim J, Nilsson J, Bergman A, Bichay T, Cilla S, Deodato F, Doro R, Eich H, Fau P, Fong M, Haverkamp U, Heinze S, Köhn J, de Klerck E, Lambrecht U, Masi L, Mayville A, Morganti A, Milder M, Rades D, Ramm U, Ryu S, Soltys S, Tazeh Maha FE, Toom WD, Wang L, Blanck O. A Multi-Platform Treatment Planning Benchmark Study for Spinal Radiosurgery. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Kutzora S, Puerto Valencia L, Weber A, Huß J, Hendrowarsito L, Nennstiel-Ratzel U, Herr C, Heinze S. Residential crowding and asthma in preschool children, a cross-sectional study. Allergol Immunopathol (Madr) 2019; 47:386-400. [PMID: 30797627 DOI: 10.1016/j.aller.2018.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 11/22/2018] [Accepted: 12/04/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Asthma is the most common chronic disease in children, and associations with crowding have been reported. The aim of this study was to explore possible associations of crowding with asthma in children. METHODS Seven cross-sectional surveys with preschool children were conducted within the framework of the health monitoring units in Bavaria, Germany, from 2004 to 2014. Residential crowding was defined as habitation of more than one person per room or less than 20m2 living space per person. Logistic regression models examined temporal changes in crowding, applying the first survey as reference. The relationship between crowding and physician-diagnosed asthma, asthma defined by the International Study of Asthma and Allergies in Childhood (ISAAC) and asthma symptoms were analyzed. RESULTS Analyzing temporal changes of crowding rates did not reveal any differences over the years. However, the stratified descriptive analysis indicated a crowding increase in time in urban households where parents had a low education level (47.9% in 2004/05, 55.8% in 2014/15). No association was found between crowding and the variables "physician-diagnosed asthma" in 2014/15, "asthma defined by ISAAC" in 2014/15, or "wheezing" in 2014/15. A positive association with cough was identified in 2014/15 after adjusting for confounders (aOR=1.42 [95% CI: 1.20-1.69]). CONCLUSIONS In general, residential crowding did not change from 2004 to 2014; however, there seems to be a small upsurge for children with low-educated parents, living in urban areas over the years. A statistically significant association between crowding and cough was only found in the survey from 2014/15.
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14
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Puerto Valencia LM, Weber A, Spegel H, Bögle R, Selmani A, Heinze S, Herr C. Yoga in the workplace and health outcomes: a systematic review. Occup Med (Lond) 2019; 69:195-203. [DOI: 10.1093/occmed/kqz033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- L M Puerto Valencia
- Institute for Medical Informatics, Biometry and Epidemiology (IBE) at the Ludwig-Maximilians-Universität München, Munich, Germany
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
| | - A Weber
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
| | - H Spegel
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
| | - R Bögle
- Yoga Forum München e.V, Munich, Germany
- Center for Behavioural Medicine, Kothrud, Pune, India
| | - A Selmani
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
| | - S Heinze
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
- Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
| | - C Herr
- Department of Occupational and Environmental Health/Epidemiology, Bavarian Health and Food Safety Authority (LGL), Munich, Germany
- Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Ludwig-Maximilians-University Munich, Munich, Germany
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15
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Yaftian N, Andrews D, Pascoe H, Tsui A, Heinze S, Antippa P. Predicting Unexpected Postoperative Air Leak in Thoracic Surgery Using Digital Chest Drains. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.02.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Heinze S, Kornberger P, Grätz C, Schwarz WH, Zverlov VV, Liebl W. Transmating: conjugative transfer of a new broad host range expression vector to various Bacillus species using a single protocol. BMC Microbiol 2018; 18:56. [PMID: 29884129 PMCID: PMC5994095 DOI: 10.1186/s12866-018-1198-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 05/30/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The genus Bacillus includes a great variety of species with potential applications in biotechnology. While species such as B. subtilis or B. licheniformis are well-known and used to provide various products at industrial scale, other Bacillus species are less characterized and are not yet used in commercial processes. One reason for this is the fact that genetic manipulation of new isolates is usually complicated with conventional techniques which have to be adapted to each new strain. Even in well-established strains, the available transformation protocols often suffer from low efficiencies. RESULTS In this paper, we provide a new broad host range E. coli/Bacillus shuttle vector, named pBACOV (Bacillus conjugation vector), that can be efficiently transferred to various Bacillus species using a single protocol. A variant of pBACOV carrying the sfGFP gene was successfully transferred to eight different species from the genus Bacillus and to one Paenibacillus species using triparental conjugation ("transmating"). This was achieved using a single protocol and worked for nine out of eleven tested acceptor species. The transmating procedure was used to test expression of the heterologous reporter gene sfGFP under control of the PaprE-promoter from B. subtilis in several Bacillus species in parallel. Expression of sfGFP was found in eight out of nine transmates. For several of the tested species, this is the first report of a method for genetic modification and heterologous gene expression. The expression level, analyzed by measuring the relative sfGFP-fluorescence normalized to the cell density of the cultures, was highest in B. mojavensis. CONCLUSIONS The new shuttle vector pBACOV can be transferred to many different Bacillus and Paenibacillus species using a simple and efficient transmating protocol. It is a versatile tool facilitating the application of recombinant DNA technology in new as well as established strains, or selection of an ideal host for heterologous gene expression from a multitude of strains. This paves the way for the genetic modification and biotechnological exploitation of the broad diversity of species of Bacillus and related genera as well as different strains from these species.
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Affiliation(s)
- Simon Heinze
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany
| | - Petra Kornberger
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany.
| | - Christian Grätz
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany
| | - Wolfgang H Schwarz
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany
| | - Vladimir V Zverlov
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany.,Institute of Molecular Genetics, Russian Academy of Science, Kurchatov Sq. 2, 123182, Moscow, Russia
| | - Wolfgang Liebl
- Department of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, D-85354, Freising-Weihenstephan, Germany
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17
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Moustakis C, Chan MKH, Kim J, Nilsson J, Bergman A, Bichay TJ, Palazon Cano I, Cilla S, Deodato F, Doro R, Dunst J, Eich HT, Fau P, Fong M, Haverkamp U, Heinze S, Hildebrandt G, Imhoff D, de Klerck E, Köhn J, Lambrecht U, Loutfi-Krauss B, Ebrahimi F, Masi L, Mayville AH, Mestrovic A, Milder M, Morganti AG, Rades D, Ramm U, Rödel C, Siebert FA, den Toom W, Wang L, Wurster S, Schweikard A, Soltys SG, Ryu S, Blanck O. Treatment planning for spinal radiosurgery : A competitive multiplatform benchmark challenge. Strahlenther Onkol 2018; 194:843-854. [PMID: 29802435 DOI: 10.1007/s00066-018-1314-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 05/08/2018] [Indexed: 12/20/2022]
Abstract
PURPOSE To investigate the quality of treatment plans of spinal radiosurgery derived from different planning and delivery systems. The comparisons include robotic delivery and intensity modulated arc therapy (IMAT) approaches. Multiple centers with equal systems were used to reduce a bias based on individual's planning abilities. The study used a series of three complex spine lesions to maximize the difference in plan quality among the various approaches. METHODS Internationally recognized experts in the field of treatment planning and spinal radiosurgery from 12 centers with various treatment planning systems participated. For a complex spinal lesion, the results were compared against a previously published benchmark plan derived for CyberKnife radiosurgery (CKRS) using circular cones only. For two additional cases, one with multiple small lesions infiltrating three vertebrae and a single vertebra lesion treated with integrated boost, the results were compared against a benchmark plan generated using a best practice guideline for CKRS. All plans were rated based on a previously established ranking system. RESULTS All 12 centers could reach equality (n = 4) or outperform (n = 8) the benchmark plan. For the multiple lesions and the single vertebra lesion plan only 5 and 3 of the 12 centers, respectively, reached equality or outperformed the best practice benchmark plan. However, the absolute differences in target and critical structure dosimetry were small and strongly planner-dependent rather than system-dependent. Overall, gantry-based IMAT with simple planning techniques (two coplanar arcs) produced faster treatments and significantly outperformed static gantry intensity modulated radiation therapy (IMRT) and multileaf collimator (MLC) or non-MLC CKRS treatment plan quality regardless of the system (mean rank out of 4 was 1.2 vs. 3.1, p = 0.002). CONCLUSIONS High plan quality for complex spinal radiosurgery was achieved among all systems and all participating centers in this planning challenge. This study concludes that simple IMAT techniques can generate significantly better plan quality compared to previous established CKRS benchmarks.
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Affiliation(s)
- Christos Moustakis
- Department of Radiation Oncology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
| | - Mark K H Chan
- Department of Radiation Oncology, University Clinic Schleswig-Holstein, Kiel, Germany
| | - Jinkoo Kim
- Department of Radiation Oncology, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Joakim Nilsson
- Department of Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden
| | - Alanah Bergman
- Vancouver Cancer Centre, Department of Medical Physics, BC Cancer Agency, Vancouver, BC, Canada
| | - Tewfik J Bichay
- Lacks Cancer Center, Department of Radiation Oncology, Mercy Health Saint Mary's, Grand Rapids, MI, USA.,Wayne State University School of Medicine, Detroit, MI, USA
| | | | - Savino Cilla
- Fondazione di Ricerca e Cura "Giovanni Paolo II", Medical Physics Unit, Catholic University of Sacred Heart, Campobasso, Italy
| | - Francesco Deodato
- Fondazione di Ricerca e Cura "Giovanni Paolo II", Radiation Oncology Unit, Catholic University of Sacred Heart, Campobasso, Italy
| | - Raffaela Doro
- Department of Medical Physics and Radiation Oncology, IFCA, Firenze, Italy
| | - Jürgen Dunst
- Department of Radiation Oncology, University Clinic Schleswig-Holstein, Kiel, Germany.,Department of Radiation Oncology, University Clinic Copenhagen, Copenhagen, Denmark
| | - Hans Theodor Eich
- Department of Radiation Oncology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany
| | - Pierre Fau
- University of Aix Marseille, Marseille, France.,Physics Department, Institut Paoli Calmettes, Marseille, France
| | - Ming Fong
- Vancouver Cancer Centre, Department of Radiation Therapy, BC Cancer Agency, Vancouver, BC, Canada
| | - Uwe Haverkamp
- Department of Radiation Oncology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany
| | - Simon Heinze
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Guido Hildebrandt
- Department of Radiation Oncology, University Medicine Rostock, Rostock, Germany
| | - Detlef Imhoff
- Department of Radiation Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Erik de Klerck
- Department of Radiation Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Janett Köhn
- Department of Radiation Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Ulrike Lambrecht
- Department of Radiation Oncology, University Clinic Erlangen, Erlangen, Germany
| | - Britta Loutfi-Krauss
- Department of Radiation Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Fatemeh Ebrahimi
- Department of Radiation Oncology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany
| | - Laura Masi
- Department of Medical Physics and Radiation Oncology, IFCA, Firenze, Italy
| | - Alan H Mayville
- Lacks Cancer Center, Department of Radiation Oncology, Mercy Health Saint Mary's, Grand Rapids, MI, USA
| | - Ante Mestrovic
- Vancouver Cancer Centre, Department of Medical Physics, BC Cancer Agency, Vancouver, BC, Canada
| | - Maaike Milder
- Department of Radiation Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Alessio G Morganti
- Radiation Oncology Department, DIMES University of Bologna-S. Orsola Malpighi Hospital, Bologna, Italy
| | - Dirk Rades
- Department of Radiation Oncology, University Clinic Schleswig-Holstein, Lübeck, Germany
| | - Ulla Ramm
- Department of Radiation Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Claus Rödel
- Department of Radiation Oncology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Frank-Andre Siebert
- Department of Radiation Oncology, University Clinic Schleswig-Holstein, Kiel, Germany
| | - Wilhelm den Toom
- Department of Radiation Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Lei Wang
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| | - Stefan Wurster
- Saphir Radiosurgery Center, Northern Germany and Frankfurt, Güstrow, Germany.,Department of Radiation Oncology, University Medicine Greifswald, Greifswald, Germany
| | - Achim Schweikard
- Institute for Robotic and Cognitive Systems, University of Lübeck, Lübeck, Germany
| | - Scott G Soltys
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
| | - Samuel Ryu
- Department of Radiation Oncology, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Oliver Blanck
- Department of Radiation Oncology, University Clinic Schleswig-Holstein, Kiel, Germany.,Saphir Radiosurgery Center, Northern Germany and Frankfurt, Güstrow, Germany
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18
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Weber A, Sirrenberg M, Böse-O'Reilly S, Heinze S, Herr C. Umsetzung des Hitzeaktionsplans in Bayern zum Schutz der menschlichen Gesundheit. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1639285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A Weber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin /-epidemiologie, München, Germany
| | - M Sirrenberg
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin /-epidemiologie, München, Germany
| | - S Böse-O'Reilly
- Ludwig-Maximilians-Universität München Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin am Klinikum der Universität München, München, Germany
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin /-epidemiologie, München, Germany
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin /-epidemiologie, München, Germany
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19
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Dreher A, Gerstner D, Weilnhammer V, Hendrowarsito L, Twardella D, Reiter C, Perez-Alvarez C, Steffens T, Herr C, Heinze S. Longitudinalanalyse der Freizeitlärmexposition bei Jugendlichen mit speziellem Fokus auf tragbare Musikabspielgeräte: Die OHRKAN Kohortenstudie. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1639279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A Dreher
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - D Gerstner
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - V Weilnhammer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - D Twardella
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Zentrum für Krebsfrüherkennung und Krebsregistrierung, Nürnberg, Germany
| | - C Reiter
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - C Perez-Alvarez
- Universitätsklinikum Regensburg Phoniatrie / Pädaudiologie, Regensburg, Germany
| | - T Steffens
- Universitätsklinikum Regensburg, Audiologie, Regensburg, Germany
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
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Weilnhammer V, Heinze S, Nowak D, Herr C. Aktuelle Versorgungssituation umweltmedizinischer Patienten. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1639278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- V Weilnhammer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
| | - D Nowak
- Klinikum der Universität München, Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, München, Germany
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), Arbeits- und Umweltmedizin, Epidemiologie, München, Germany
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21
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Abstract
Skyrmions are localized, topologically non-trivial spin structures which have raised high hopes for future spintronic applications. A key issue is skyrmion stability with respect to annihilation into the ferromagnetic state. Energy barriers for this collapse have been calculated taking only nearest neighbor exchange interactions into account. Here, we demonstrate that exchange frustration can greatly enhance skyrmion stability. We focus on the prototypical film system Pd/Fe/Ir(111) and use an atomistic spin model parametrized from first-principles calculations. We show that energy barriers and critical fields of skyrmion collapse as well as skyrmion lifetimes are drastically enhanced due to frustrated exchange and that antiskyrmions are metastable. In contrast an effective nearest-neighbor exchange model can only account for equilibrium properties of skyrmions such as their magnetic field dependent profile or the zero temperature phase diagram. Our work shows that frustration of long range exchange interactions - a typical feature in itinerant electron magnets - is a route towards enhanced skyrmion stability even in systems with a ferromagnetic ground state.
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Affiliation(s)
- S von Malottki
- Institute of Theoretical Physics and Astrophysics, University of Kiel, 24098, Kiel, Germany
| | - B Dupé
- Institute of Theoretical Physics and Astrophysics, University of Kiel, 24098, Kiel, Germany
- Institute of Physics, University of Mainz, 55128, Mainz, Germany
| | - P F Bessarab
- School of Engineering and Natural Sciences - Science Institute, University of Iceland, 107, Reykjavik, Iceland
- University ITMO, St. Petersburg, 197101, Russia
| | - A Delin
- Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Electrum 229, SE-16440, Kista, Sweden
- Department of Physics and Astronomy, Materials Theory Division, Uppsala University, Box 516, SE-75120, Uppsala, Sweden
| | - S Heinze
- Institute of Theoretical Physics and Astrophysics, University of Kiel, 24098, Kiel, Germany.
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Adler AC, Zamfir M, Hendrowarsito L, Dammeyer A, Schomacher L, Karlin B, Franitza M, Nasri L, Hörmansdorfer S, Tuschak C, Valenza G, Ewert T, Hierl W, Ochmann U, Herr C, Heinze S. Auswirkung der Besiedelung von gesunden Schwangeren und Neugeborenen mit multiresistenten Erregern (MRE) und Staphylococcus aureus (SA) auf die Krankheitskosten. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- AC Adler
- Bayerisches Staatsministerium für Gesundheit und Pflege, München
| | - M Zamfir
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - A Dammeyer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - L Schomacher
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - B Karlin
- Rotkreuzklinikum München, Frauenklinik, München
| | - M Franitza
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - L Nasri
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - S Hörmansdorfer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - C Tuschak
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - G Valenza
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - T Ewert
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - W Hierl
- Bayerisches Staatsministerium für Gesundheit und Pflege, München
| | - U Ochmann
- Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Walser S, Gerstner D, Twardella D, Reiter C, Weilnhammer V, Hendrowarsito L, Perez-Alvarez C, Steffens T, Stilianakis N, Heinze S, Herr C. Monitoring von lärmbedingten Hörschwellenverschiebungen bei Jugendlichen und jungen Erwachsenen: Relevanz der Exposition gegenüber Freizeitlärm im Rahmen der prospektiven Ohrkan-Kohortenstudie. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Walser
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - D Gerstner
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - D Twardella
- Zentrum für Krebsfrüherkennung und Krebsregistrierung, Nürnberg
| | - C Reiter
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - V Weilnhammer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Perez-Alvarez
- Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum, Regensburg
| | - T Steffens
- Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum, Regensburg
| | - N Stilianakis
- Gemeinsame Forschungsstelle, Europäische Kommission, Ispra
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Zamfir M, Heinze S, Adler AC, Dammeyer A, Nasri L, Schomacher L, Karlin B, Franitza M, Hörmansdorfer S, Tuschak C, Valenza G, Ochmann U, Herr C. Bedeutung der Abstrichorte in Bezug auf die Besiedelung mit multiresistenten Erregern (MRE) bei gesunden Schwangeren und Neugeborenen. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Zamfir
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - AC Adler
- Bayerisches Staatsministerium für Gesundheit und Pflege, München
| | - A Dammeyer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - L Nasri
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - L Schomacher
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - B Karlin
- Rotkreuzklinikum München, Frauenklinik, München
| | - M Franitza
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - S Hörmansdorfer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - C Tuschak
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - G Valenza
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - U Ochmann
- Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Herr C, Heinze S. Umweltmedizin im Gesundheitsschutz. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1601896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Weber A, Fuchs N, Herr C, Hendrowarsito L, Mutius E, Nennstiel-Ratzel U, Heinze S. Assoziation zwischen elternberichteten Innenraumexpositionen und Atemwegssymptomen und allergischen Erkrankungen bei Einschulungskindern. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- A Weber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - N Fuchs
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - E Mutius
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital, Ludwig-Maximilians-Universität, München
| | - U Nennstiel-Ratzel
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Dammeyer A, Heinze S, Adler AC, Nasri L, Schomacher L, Zamfir M, Karlin B, Franitza M, Hörmansdorfer S, Tuschak C, Valenza G, Ochmann U, Herr C. Klinische Relevanz der Kolonisierung mit multiresistenten Erregern (MRE). Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- A Dammeyer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - AC Adler
- Bayerisches Staatsministerium für Gesundheit und Pflege, München
| | - L Nasri
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - L Schomacher
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - M Zamfir
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - B Karlin
- Rotkreuzklinikum München, Frauenklinik, München
| | - M Franitza
- Klinikum Augsburg, Frauenklinik, Augsburg
| | - S Hörmansdorfer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - C Tuschak
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - G Valenza
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Erlangen
| | - U Ochmann
- Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, Klinikum der Universität München, Ludwig-Maximilians-Universität München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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29
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Kutzora S, Weber A, Hendrowarsito L, Nennstiel-Ratzel U, Mutius E, Herr C, Heinze S. Unterschiedliche Muster von asthmatischen Atemwegsgeräuschen (Giemen) bei Vorschulkindern: Einflussfaktoren, Versorgung und Stadt-/Land-Unterschiede. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1601999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Kutzora
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - A Weber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - U Nennstiel-Ratzel
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - E Mutius
- Dr. von Haunersches Kinderspital, Kinderklinik und Kinderpoliklinik der Ludwig-Maximilians-Universität München, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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30
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Matias Garcia PR, Walser S, Gerstner D, Heinze S, Herr C. Ausbruchsmanagement von luftübertragenen Legionellen-Infektionen: ein systematischer Review von Standards und Handlungsrichtlinien. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- PR Matias Garcia
- Institut für medizinische Informationsverarbeitung, Biometrie und Epidemiologie, Ludwig-Maximilians-Universität München, München
| | - S Walser
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - D Gerstner
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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31
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Puerto L, Weber A, Herr C, Hendrowarsito L, Nennstiel-Ratzel U, Heinze S. Beengte Wohnverhältnisse („Crowding“) in Haushalten mit Einschulungskindern: Zeitlicher Verlauf über 10 Jahre und Assoziation mit einer Asthma-Diagnose sowie -symptomen. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- L Puerto
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - A Weber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - U Nennstiel-Ratzel
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Walser S, Bartha B, Brenner B, Tuschak C, Huber S, Heinze S, Höller C, Lück C, Seidel M, Herr C. Standardisiertes Ausbruchsmanagement bei anthropogen verursachten aerogenen Legionellenexpositionen. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Walser
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - B Bartha
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - B Brenner
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Tuschak
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - S Huber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Höller
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - C Lück
- Technische Universität Dresden, Dresden
| | - M Seidel
- Technische Universität München, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Weber A, Herr C, Hendrowarsito L, Pusch G, Effner R, Nennstiel-Ratzel U, Horn S, Forster F, Schmid R, Buters J, Heinze S. Sensibilisierungen und Allergien bei Kindern in Bayern (SEAL-Studie). Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- A Weber
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - L Hendrowarsito
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - G Pusch
- Zentrum für Allergie und Umwelt, Technische Universität München, München
| | - R Effner
- Zentrum für Allergie und Umwelt, Technische Universität München, München
| | - U Nennstiel-Ratzel
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, Oberschleißheim
| | - S Horn
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - F Forster
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - R Schmid
- Gesundheitsamt Günzburg, Günzburg
| | - J Buters
- Zentrum für Allergie und Umwelt, Technische Universität München, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Wei W, Heinze S, Gerstner D, Twardella D, Reiter C, Weilnhammer V, Perez-Alvarez C, Steffens T, Herr C. Hochtonsenke und Hörschwellenverschiebung im erweiterten Hochtonbereich in Relation zur Gesamtfreizeitlärmexposition bei Jugendlichen: eine explorative Analyse. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1602115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- W Wei
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - S Heinze
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - D Gerstner
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - D Twardella
- Zentrum für Krebsfrüherkennung und Krebsregistrierung, Nürnberg
| | - C Reiter
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - V Weilnhammer
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
| | - C Perez-Alvarez
- Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum, Regensburg
| | - T Steffens
- Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum, Regensburg
| | - C Herr
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit, München
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Heinze S, Filsinger B, Kastenholz G, Schröder R. Intraoperative Intermittent Blocking of the Common Iliac Arteries in Cases of Placenta Percreta without the Use of Fluoroscopy. ROFO-FORTSCHR RONTG 2016; 188:1151-1155. [DOI: 10.1055/s-0042-113614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- S. Heinze
- Institute of Forensic Medicine, Goethe-Universität Frankfurt am Main, Germany
| | - B. Filsinger
- Maternity Clinic, St. Marienkrankenhaus, Ludwigshafen, Germany
| | - G. Kastenholz
- Department of Radiology, St. Marienkrankenhaus, Ludwigshafen, Germany
| | - R. Schröder
- Department of Radiology, St. Marienkrankenhaus, Ludwigshafen, Germany
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Ziegler J, Heinze S, Urbas L. Commercial Off-the-shelf-Lösungen als neue Impulsgeber für Smart Maintenance. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schöneberg J, Otte F, Néel N, Weismann A, Mokrousov Y, Kröger J, Berndt R, Heinze S. Ballistic Anisotropic Magnetoresistance of Single-Atom Contacts. Nano Lett 2016; 16:1450-1454. [PMID: 26783634 DOI: 10.1021/acs.nanolett.5b05071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Anisotropic magnetoresistance, that is, the sensitivity of the electrical resistance of magnetic materials on the magnetization direction, is expected to be strongly enhanced in ballistic transport through nanoscale junctions. However, unambiguous experimental evidence of this effect is difficult to achieve. We utilize single-atom junctions to measure this ballistic anisotropic magnetoresistance (AMR). Single Co and Ir atoms are deposited on domains and domain walls of ferromagnetic Fe layers on W(110) to control their magnetization directions. They are contacted with nonmagnetic tips in a low-temperature scanning tunneling microscope to measure the junction conductances. Large changes of the magnetoresistance occur from the tunneling to the ballistic regime due to the competition of localized and delocalized d-orbitals, which are differently affected by spin-orbit coupling. This work shows that engineering the AMR at the single atom level is feasible.
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Affiliation(s)
| | | | - N Néel
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany
| | | | - Y Mokrousov
- Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA , D-52425 Jülich, Germany
| | - J Kröger
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany
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Uhlmann E, Stawiszynski B, Leyens C, Heinze S, Sammler F. Hard Turning of Hot Work and Cold Work Steels with HiPIMS and DCMS TiAlN Coated Carbide Inserts. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.procir.2016.03.231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Heinze S, Schröder RJ, Herbig J, Urban R, Breitmeier D. Analysis of metacarpal V fractures of an interdisciplinary emergency room of an urban German hospital from a forensic viewpoint. AUST J FORENSIC SCI 2015. [DOI: 10.1080/00450618.2015.1073788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Markert L, Bockholdt B, Verhoff MA, Heinze S, Parzeller M. Renaissance of criticism on the concept of brain death--the role of legal medicine in the context of the interdisciplinary discussion. Int J Legal Med 2015; 130:587-95. [PMID: 26174445 DOI: 10.1007/s00414-015-1224-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 06/22/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND In the practice of legal medicine in Germany, the assessment of brain death is of minor importance and attracts little attention. However, since several years, international criticism on the concept of brain death has culminated. By reviewing literature and the results of a questionnaire distributed among the participants of the 93rd Annual Congress of the Germany Society of Legal Medicine, the state of knowledge and the current views on brain death were evaluated. MATERIALS AND METHODS Literature search of recent publications regarding brain death was performed (PubMed database, references of legal medicine, Report of the President's Council on Bioethics, USA 2008). A questionnaire was developed and distributed among the participants of the Congress. RESULTS The assumption that individual and brain death are synonymous is criticized. Internationally, there are trends to harmonize the very different clinical criteria to assess brain death. The diagnostic advantage of novel techniques such as CT angiography is controversially discussed. It becomes apparent that procedures which record the blood flow and perfusion of the brain will be applied more in the future. Regrettably, these developments are not described in the literature of legal medicine. Moreover, among German forensic scientists, different views concerning brain death exist. The majority favors its equivalent treatment with individual death. The thanatological background can be improved concerning certain aspects of brain death as well as its legal implications. CONCLUSION Teaching and research in legal medicine should include the subject brain death. Expertise in forensic science may contribute to the interdisciplinary discussion on brain death. The transfer of actual knowledge, also on disputed ethical aspects of thanatology, to physicians of all disciplines is of great importance.
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Affiliation(s)
- L Markert
- Institute of Legal Medicine, University Hospital, Goethe University of Frankfurt, Frankfurt, Germany.
| | - B Bockholdt
- Institute of Legal Medicine, Ernst Moritz Arndt University of Greifswald, University Medicine Greifswald, Greifswald, Germany
| | - M A Verhoff
- Institute of Legal Medicine, University Hospital, Goethe University of Frankfurt, Frankfurt, Germany
| | - S Heinze
- Institute of Legal Medicine, Johannes Gutenberg University of Mainz, Mainz, Germany.,Department of Radiology, St. Marienkrankenhaus, Ludwigshafen am Rhein, Germany
| | - M Parzeller
- Institute of Legal Medicine, University Hospital, Goethe University of Frankfurt, Frankfurt, Germany.
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Leis B, Heinze S, Angelov A, Pham VTT, Thürmer A, Jebbar M, Golyshin PN, Streit WR, Daniel R, Liebl W. Functional Screening of Hydrolytic Activities Reveals an Extremely Thermostable Cellulase from a Deep-Sea Archaeon. Front Bioeng Biotechnol 2015; 3:95. [PMID: 26191525 PMCID: PMC4486847 DOI: 10.3389/fbioe.2015.00095] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/17/2015] [Indexed: 01/27/2023] Open
Abstract
Extreme habitats serve as a source of enzymes that are active under extreme conditions and are candidates for industrial applications. In this work, six large-insert mixed genomic libraries were screened for hydrolase activities in a broad temperature range (8-70°C). Among a variety of hydrolytic activities, one fosmid clone, derived from a library of pooled isolates of hyperthermophilic archaea from deep sea vents, displayed hydrolytic activity on carboxymethyl cellulose substrate plates at 70°C but not at lower temperatures. Sequence analysis of the fosmid insert revealed a gene encoding a novel glycoside hydrolase family 12 (GHF12) endo-1,4-β-glucanase, termed Cel12E. The enzyme shares 45% sequence identity with a protein from the archaeon Thermococcus sp. AM4 and displays a unique multidomain architecture. Biochemical characterization of Cel12E revealed a remarkably thermostable protein, which appears to be of archaeal origin. The enzyme displayed maximum activity at 92°C and was active on a variety of linear 1,4-β-glucans like carboxymethyl cellulose, β-glucan, lichenan, and phosphoric acid swollen cellulose. The protein is able to bind to various insoluble β-glucans. Product pattern analysis indicated that Cel12E is an endo-cleaving β-glucanase. Cel12E expands the toolbox of hyperthermostable archaeal cellulases with biotechnological potential.
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Affiliation(s)
- Benedikt Leis
- Department of Microbiology, School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Simon Heinze
- Department of Microbiology, School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Angel Angelov
- Department of Microbiology, School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Vu Thuy Trang Pham
- Department of Microbiology, School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Andrea Thürmer
- Göttingen Genomics Laboratory, Department of Genomic and Applied Microbiology, Georg-August University Göttingen, Göttingen, Germany
| | - Mohamed Jebbar
- Laboratoire de Microbiologie des Environnements Extrêmes-UMR 6197 (CNRS-Ifremer-UBO), Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, Plouzané, France
| | | | - Wolfgang R. Streit
- Fakultät für Mathematik, Informatik und Naturwissenschaften Biologie, Biozentrum Klein Flottbek, Universität Hamburg, Hamburg, Germany
| | - Rolf Daniel
- Göttingen Genomics Laboratory, Department of Genomic and Applied Microbiology, Georg-August University Göttingen, Göttingen, Germany
| | - Wolfgang Liebl
- Department of Microbiology, School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
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Vazirani J, Liu J, Better N, Heinze S, Hacking C, Einsiedel P, Langenberg F, Joshi S. Atherosclerotic plaque on CTCA and medication use. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Biswas S, O’Donnell K, Lui E, Wilson W, Langenberg F, Heinze S, Better N, Cheung M, Grigg L, Joshi S. Cardiac CT in patients with single ventricle physiology. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Vazirani J, Liu J, Better N, Heinze S, Einsiedel P, Langenberg F, Eccleston D, Joshi S. Appropriate use criteria and CTCA - is there a role in asymptomatic individuals? Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Petkov P, Yavahchova M, Möller O, Dewald A, Saha B, Fitzler A, Jessen K, Tonev D, Klug T, Heinze S, Jolie J, von Brentano P, Goutev N, Bazzacco D, Ur CA, Farnea CA, Axiotis M, Lunardi S, de Angelis G, Napoli DR, Marginean N, Martinez T, Caprio MA. Low-lying bands with different quadrupole deformation in 155Dy. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bernards C, Casten R, Werner V, von Brentano P, Bucurescu D, Graw G, Heinze S, Hertenberger R, Jolie J, Lalkovski S, Meyer D, Mücher D, Pejovic P, Scholl C, Wirth HF. Investigation of 0 +states in mercury isotopes after two-neutron transfer. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dewald A, Heinze S, Feuerstein C, Müller-Gatermann C, Stolz A, Schiffer M, Zitzer G, Dunai T, Rethemeyer J, Melles M, Wiesel H, Blanckenburg FV. The first year of operation of CologneAMS; performance and developments. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20136303006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Néel N, Schröder S, Ruppelt N, Ferriani P, Kröger J, Berndt R, Heinze S. Tunneling anisotropic magnetoresistance at the single-atom limit. Phys Rev Lett 2013; 110:037202. [PMID: 23373948 DOI: 10.1103/physrevlett.110.037202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 12/19/2012] [Indexed: 06/01/2023]
Abstract
The tunneling anisotropic magnetoresistance (TAMR) of single Co atoms adsorbed on a double-layer Fe film on W(110) is observed by scanning tunneling spectroscopy. Without applying an external magnetic field the TAMR is found by comparing spectra of atoms that are adsorbed on the domains and domain walls of the Fe film. The TAMR can be as large as 12% and repeatedly changes sign as a function of bias voltage. First-principles calculations show that the hybridization between Co d states of different orbital symmetries depends on the magnetization direction via spin-orbit coupling. This leads to an anisotropy of the density of states and thus induces a TAMR.
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Affiliation(s)
- N Néel
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
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Leong K, Einsiedel P, Lui E, Better N, Heinze S, Neal C, Langenberg F, Gurvitch R, Eccleston D, Joshi S. Comparison of Radiation Doses Between Coronary CT and Conventional Coronary Angiography. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Affiliation(s)
- M. Hew
- University of Melbourne; Melbourne Victoria Australia
- Royal Melbourne Hospital; Melbourne Victoria Australia
| | - S. Heinze
- University of Melbourne; Melbourne Victoria Australia
- Royal Melbourne Hospital; Melbourne Victoria Australia
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