Töpperwien, Mareike

[["dc.bibliographiccitation.firstpage","24"],["dc.bibliographiccitation.issue","S2"],["dc.bibliographiccitation.journal","Microscopy and Microanalysis"],["dc.bibliographiccitation.lastpage","25"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Eckermann, Marina"],["dc.contributor.author","Robisch, Anna Lena"],["dc.contributor.author","Stadelmann, Christine"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2020-03-04T13:40:15Z"],["dc.date.available","2020-03-04T13:40:15Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1017/S1431927618012540"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/63109"],["dc.language.iso","en"],["dc.relation.issn","1431-9276"],["dc.relation.issn","1435-8115"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray imaging"],["dc.subject.gro","biomedical tomography"],["dc.title","3d Virtual Histology of Human Cerebellum by Propagation-Based X-Ray Phase-Contrast Tomography"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","383"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","European Biophysics Journal"],["dc.bibliographiccitation.lastpage","392"],["dc.bibliographiccitation.volume","45"],["dc.contributor.author","Töpperwien, M."],["dc.contributor.author","Priebe, M."],["dc.contributor.author","Salditt, T."],["dc.date.accessioned","2017-09-07T11:44:50Z"],["dc.date.available","2017-09-07T11:44:50Z"],["dc.date.issued","2016"],["dc.description.abstract","We have performed scanning nano-beam small-angle X-ray scattering (nano-SAXS) experiments on in vitro-formed actin filaments cross-linked with -actinin. The experimental method combines a high resolution in reciprocal space with a real space resolution as given by the spot-size of the nano-focused X-ray beam, and opens up new opportunities to study local super-molecular structures of actin filaments. In this first proof-of-concept, we show that the local orientation of actin bundles formed by the cross-linking can be visualized by the X-ray darkfield maps. The filament bundles give rise to highly anisotropic diffraction patterns showing distinct streaks perpendicular to the bundle axes. Interestingly, some diffraction patterns exhibit a fine structure in the form of intensity modulations allowing for a more detailed analysis of the order within the bundles. A first empirical quantification of these modulations is included in the present work."],["dc.identifier.doi","10.1007/s00249-015-1107-9"],["dc.identifier.gro","3141659"],["dc.identifier.isi","000378049100001"],["dc.identifier.pmid","26715112"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6342"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10 / Funder: Deutsche Forschungsgemeinschaft [SFB 937/A11]"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.eissn","1432-1017"],["dc.relation.issn","0175-7571"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray scattering"],["dc.title","Actin bundles cross-linked with α -actinin studied by nanobeam X-ray diffraction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","041109"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.volume","113"],["dc.contributor.author","Hagemann, Johannes"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2020-04-23T14:35:46Z"],["dc.date.available","2020-04-23T14:35:46Z"],["dc.date.issued","2018"],["dc.description.abstract","X-ray phase contrast imaging based on free space propagation relies on phase retrieval to obtain sharp images of micro- and nanoscale objects, with widespread applications in material science and biomedical research. For high resolution synchrotron experiments, phase retrieval is largely based on the single step reconstruction using the contrast transfer function approach (CTF), as introduced almost twenty years ago [Cloetens et al., Appl. Phys. Lett. 75, 2912 (1999)]. Notwithstanding its tremendous merits, this scheme makes stringent assumptions on the optical properties of the object, requiring, in particular, a weakly varying phase. In this work, we show how significant the loss in image quality becomes if these assumption are violated, and how phase retrieval can be easily improved by a simple scheme of alternating projections. Importantly, the approach demonstrated here uses the same input data and constraint sets as the conventional CTF-based phase retrieval, and is particularly well suited for the holographic regime."],["dc.identifier.doi","10.1063/1.5029927"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64332"],["dc.language.iso","en"],["dc.relation.eissn","1077-3118"],["dc.relation.issn","0003-6951"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray imaging"],["dc.title","Phase retrieval for near-field X-ray imaging beyond linearisation or compact support"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e2014472118"],["dc.bibliographiccitation.issue","18"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences of the United States of America"],["dc.bibliographiccitation.volume","118"],["dc.contributor.author","Keppeler, Daniel"],["dc.contributor.author","Kampshoff, Christoph A."],["dc.contributor.author","Thirumalai, Anupriya"],["dc.contributor.author","Duque-Afonso, Carlos J."],["dc.contributor.author","Schaeper, Jannis J."],["dc.contributor.author","Quilitz, Tabea"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Vogl, Christian"],["dc.contributor.author","Hessler, Roland"],["dc.contributor.author","Meyer, Alexander"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.author","Moser, Tobias"],["dc.date.accessioned","2021-06-02T14:33:54Z"],["dc.date.available","2021-06-02T14:33:54Z"],["dc.date.issued","2021-05-04"],["dc.description.abstract","The cochlea of our auditory system is an intricate structure deeply embedded in the temporal bone. Compared with other sensory organs such as the eye, the cochlea has remained poorly accessible for investigation, for example, by imaging. This limitation also concerns the further development of technology for restoring hearing in the case of cochlear dysfunction, which requires quantitative information on spatial dimensions and the sensorineural status of the cochlea. Here, we employed X-ray phase-contrast tomography and light-sheet fluorescence microscopy and their combination for multiscale and multimodal imaging of cochlear morphology in species that serve as established animal models for auditory research. We provide a systematic reference for morphological parameters relevant for cochlear implant development for rodent and nonhuman primate models. We simulate the spread of light from the emitters of the optical implants within the reconstructed nonhuman primate cochlea, which indicates a spatially narrow optogenetic excitation of spiral ganglion neurons."],["dc.identifier.doi","10.1073/pnas.2014472118"],["dc.identifier.pmid","33903231"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/87093"],["dc.identifier.url","https://mbexc.uni-goettingen.de/literature/publications/251"],["dc.language.iso","en"],["dc.relation","EXC 2067: Multiscale Bioimaging"],["dc.relation.eissn","1091-6490"],["dc.relation.issn","0027-8424"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.relation.workinggroup","RG Moser (Molecular Anatomy, Physiology and Pathology of Sound Encoding)"],["dc.subject.gro","x-ray imaging"],["dc.subject.gro","biomedical tomography"],["dc.title","Multiscale photonic imaging of the native and implanted cochlea"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","368"],["dc.bibliographiccitation.journal","Talanta"],["dc.bibliographiccitation.lastpage","376"],["dc.bibliographiccitation.volume","161"],["dc.contributor.author","Surowka, A.D."],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Bernhardt, Markus"],["dc.contributor.author","Nicolas, J. D."],["dc.contributor.author","Osterhoff, Markus"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.author","Adamek, D."],["dc.contributor.author","Szczerbowska-Boruchowska, M."],["dc.date.accessioned","2020-03-11T09:18:44Z"],["dc.date.available","2020-03-11T09:18:44Z"],["dc.date.issued","2016"],["dc.description.abstract","Human dopaminergic system in general, and substantia nigra (SN) neurons, in particular, are implicated in the pathologies underlying the human brain aging. The interplay between aberrations in the structural organization and elemental composition of SN neuron bodies has recently gained in importance as selected metals: Fe, Cu, Zn, Ca were found to trigger oxidative-stress-mediated aberration in their molecular assembly due to concomitant protein (alpha-synuclein, tau-protein) aggregation, gliosis and finally oxidative stress. In the present study, we demonstrate an integrated approach to the analysis of the structural organization, assembly, and metals' accumulation in two distinct areas of SN: in the neuromelanin neurons and neuropil. By using the highly brilliant source of PETRA III and the Kirkpatrick-Baez nano-focus, large area histological brain slices are scanned at the sub-neuronal resolution, taking advantage of continuous motor movement and reduced acquisition time. Elemental analysis with synchrotron radiation based X-ray Fluorescence (SRXRF) is combined with X-ray Phase Contrast Imaging (XPCI) to correct for inherent aberrations in the samples' density and thickness, often referred to as the mass thickness effect. Based on the raw SRXRF spectra, we observed the accumulation of P, S, Cl, K, Ca, Fe, Cu and Zn predominantly in the SN neurons. However, upon the mass thickness correction, the distributions of Cl became significantly more uniform. Simultaneously with the fluorescence signal, the Small Angle X-ray Scattering (SAXS) is recorded by a pixel detector positioned in the far-field, enabling fast online computation of the darkfield and differential phase contrast (DPC). The data has demonstrated the SN neurons and neuropil produces excellent contrast which is due to their different mass density and scattering strength, indicative of differences in local structure and assembly therein. In all, the results show that combined SRXRF-XPCI-SAXS experiments can robustly serve as a unique tool for understanding the interplay between the chemical composition and structural organization that may drive the biochemical age-related processes occurring in the human dopaminergic system."],["dc.identifier.doi","10.1016/j.talanta.2016.08.023"],["dc.identifier.gro","3142481"],["dc.identifier.pmid","27769419"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/63294"],["dc.language.iso","en"],["dc.notes.intern","lifescience updates Crossref Import"],["dc.notes.status","final"],["dc.relation.eissn","1873-3573"],["dc.relation.issn","0039-9140"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray imaging"],["dc.title","Combined in-situ imaging of structural organization and elemental composition of substantia nigra neurons in the elderly"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6586"],["dc.bibliographiccitation.issue","29"],["dc.bibliographiccitation.journal","The Journal of Neuroscience"],["dc.bibliographiccitation.lastpage","6596"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Weil, Marie-Theres"],["dc.contributor.author","Heibeck, Saskia"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","tom Dieck, Susanne"],["dc.contributor.author","Ruhwedel, Torben"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.author","Rodicio, María C."],["dc.contributor.author","Morgan, Jennifer R."],["dc.contributor.author","Nave, Klaus-Armin"],["dc.contributor.author","Möbius, Wiebke"],["dc.contributor.author","Werner, Hauke B."],["dc.date.accessioned","2020-12-10T18:42:35Z"],["dc.date.available","2020-12-10T18:42:35Z"],["dc.date.issued","2018"],["dc.description.abstract","In the nervous system, myelination of axons enables rapid impulse conduction and is a specialized function of glial cells. Myelinating glia are the last cell type to emerge in the evolution of vertebrate nervous systems, presumably in ancient jawed vertebrates (gnathostomata) because jawless vertebrates (agnathans) lack myelin. We have hypothesized that, in these unmyelinated species, evolutionary progenitors of myelinating cells must have existed that should still be present in contemporary agnathan species. Here, we used advanced electron microscopic techniques to reveal axon-glia interactions in the sea lamprey Petromyzon marinus By quantitative assessment of the spinal cord and the peripheral lateral line nerve, we observed a marked maturation-dependent growth of axonal calibers. In peripheral nerves, all axons are ensheathed by glial cells either in bundles or, when larger than the threshold caliber of 3 μm, individually. The ensheathing glia are covered by a basal lamina and express SoxE-transcription factors, features of mammalian Remak-type Schwann cells. In larval lamprey, the ensheathment of peripheral axons leaves gaps that are closed in adults. CNS axons are also covered to a considerable extent by glial processes, which contain a high density of intermediate filaments, glycogen particles, large lipid droplets, and desmosomes, similar to mammalian astrocytes. Indeed, by in situ hybridization, these glial cells express the astrocyte marker Aldh1l1 Specimens were of unknown sex. Our observations imply that radial sorting, ensheathment, and presumably also metabolic support of axons are ancient functions of glial cells that predate the evolutionary emergence of myelin in jawed vertebrates.SIGNIFICANCE STATEMENT We used current electron microscopy techniques to examine axon-glia units in a nonmyelinated vertebrate species, the sea lamprey. In the PNS, lamprey axons are fully ensheathed either individually or in bundles by cells ortholog to Schwann cells. In the CNS, axons associate with astrocyte orthologs, which contain glycogen and lipid droplets. We suggest that ensheathment, radial sorting, and metabolic support of axons by glial cells predate the evolutionary emergence of myelin in ancient jawed vertebrates."],["dc.identifier.doi","10.1523/JNEUROSCI.1034-18.2018"],["dc.identifier.eissn","1529-2401"],["dc.identifier.issn","0270-6474"],["dc.identifier.pmid","29941446"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78012"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.eissn","1529-2401"],["dc.relation.issn","0270-6474"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","biomedical tomography"],["dc.title","Axonal Ensheathment in the Nervous System of Lamprey: Implications for the Evolution of Myelinating Glia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Krenkel, Martin"],["dc.contributor.author","Quade, Felix"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.editor","Khounsary, Ali M."],["dc.contributor.editor","Dorssen, Gert E. van"],["dc.date.accessioned","2017-09-07T11:54:05Z"],["dc.date.available","2017-09-07T11:54:05Z"],["dc.date.issued","2016"],["dc.description.abstract","Due to the large penetration depth and small wavelength hard x-rays offer a unique potential for 3D biomedical and biological imaging, combining capabilities of high resolution and large sample volume. However, in classical absorption-based computed tomography, soft tissue only shows a weak contrast, limiting the actual resolution. With the advent of phase-contrast methods, the much stronger phase shift induced by the sample can now be exploited. For high resolution, free space propagation behind the sample is particularly well suited to make the phase shift visible. Contrast formation is based on the self-interference of the transmitted beam, resulting in object-induced intensity modulations in the detector plane. As this method requires a sufficiently high degree of spatial coherence, it was since long perceived as a synchrotron-based imaging technique. In this contribution we show that by combination of high brightness liquid-metal jet microfocus sources and suitable sample preparation techniques, as well as optimized geometry, detection and phase retrieval, excellent three-dimensional image quality can be obtained, revealing the anatomy of a cobweb spider in high detail. This opens up new opportunities for 3D virtual histology of small organisms. Importantly, the image quality is finally augmented to a level accessible to automatic 3D segmentation."],["dc.identifier.doi","10.1117/12.2246460"],["dc.identifier.gro","3145109"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/2809"],["dc.language.iso","en"],["dc.notes.intern","Crossref Import"],["dc.notes.status","public"],["dc.publisher","SPIE"],["dc.publisher.place","Bellingham, Washington"],["dc.relation.conference","Advances in Laboratory-Based X-Ray Sources, Optics, and Applications"],["dc.relation.eventend","2016-08-31"],["dc.relation.eventlocation","San Diego, Calif."],["dc.relation.eventstart","2016-08-30"],["dc.relation.ispartof","Advances in Laboratory-Based X-Ray Sources, Optics, and Applications V"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray imaging"],["dc.subject.gro","biomedical tomography"],["dc.title","Laboratory-based x-ray phase-contrast tomography enables 3D virtual histology"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","02"],["dc.bibliographiccitation.journal","Journal of Medical Imaging"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Reichardt, Marius"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Khan, Amara"],["dc.contributor.author","Alves, Frauke"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2020-03-10T15:14:49Z"],["dc.date.available","2020-03-10T15:14:49Z"],["dc.date.issued","2020"],["dc.description.abstract","Purpose: We present a phase-contrast x-ray tomography study of wild type C57BL/6 mouse hearts as a nondestructive approach to the microanatomy on the scale of the entire excised organ. Based on the partial coherence at a home-built phase-contrast μ-CT setup installed at a liquid metal jet source, we exploit phase retrieval and hence achieve superior image quality for heart tissue, almost comparable to previous synchrotron data on the whole organ scale. Approach: In our work, different embedding methods and heavy metal-based stains have been explored. From the tomographic reconstructions, quantitative structural parameters describing the three-dimensional (3-D) architecture have been derived by two different fiber tracking algorithms. The first algorithm is based on the local gradient of the reconstructed electron density. By performing a principal component analysis on the local structure-tensor of small subvolumes, the dominant direction inside the volume can be determined. In addition to this approach, which is already well established for heart tissue, we have implemented and tested an algorithm that is based on a local 3-D Fourier transform. Results: We showed that the choice of sample preparation influences the 3-D structure of the tissue, not only in terms of contrast but also with respect to the structural preservation. A heart prepared with the evaporation-of-solvent method was used to compare both algorithms. The results of structural orientation were very similar for both approaches. In addition to the determination of the fiber orientation, the degree of filament alignment and local thickness of single muscle fiber bundles were obtained using the Fourier-based approach. Conclusions: Phase-contrast x-ray tomography allows for investigating the structure of heart tissue with an isotropic resolution below 10  μm. The fact that this is possible with compact laboratory instrumentation opens up new opportunities for screening samples and optimizing sample preparation, also prior to synchrotron beamtimes. Further, results from the structural analysis can help in understanding cardiovascular diseases or can be used to improve computational models of the heart."],["dc.identifier.doi","10.1117/1.JMI.7.2.023501"],["dc.identifier.pmid","32206684"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/63285"],["dc.identifier.url","https://mbexc.uni-goettingen.de/literature/publications/194"],["dc.language.iso","en"],["dc.relation","EXC 2067: Multiscale Bioimaging"],["dc.relation.issn","2329-4302"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.relation.workinggroup","RG Alves (Translationale Molekulare Bildgebung)"],["dc.subject.gro","biomedical tomography"],["dc.title","Fiber orientation in a whole mouse heart reconstructed by laboratory phase-contrast micro-CT"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","92"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Biomedical Optics Express"],["dc.bibliographiccitation.lastpage","103"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Doeppner, Thorsten R."],["dc.contributor.author","Zechmeister, Bozena"],["dc.contributor.author","Bähr, Mathias"],["dc.contributor.author","Salditt, Tim"],["dc.date.accessioned","2020-12-10T18:42:00Z"],["dc.date.available","2020-12-10T18:42:00Z"],["dc.date.issued","2019"],["dc.description.abstract","Cerebral ischemia is associated with a lack of oxygen and high-energy phosphates within the brain tissue, leading to irreversible cell injury. Visualizing these cellular injuries has long been a focus of experimental stroke research with application of immunohistochemistry as one of the standard approaches. It is, however, a destructive imaging technique with non-isotropic resolution, as only the two-dimensional tissue structure of a thin brain section is visualized using optical microscopy and specific stainings. Herein, we extend the structural analysis of mouse brain tissue after cerebral ischemia to the third dimension via microfocus computed tomography (µ-CT). Contrast of the weakly absorbing unstained brain tissue is enhanced by phase contrast. We show that recordings at two different magnifications and fields of view can be combined as a single approach for visualization of the associated structural alterations at isotropic resolution, from the level of the whole organ down to single cells."],["dc.identifier.doi","10.1364/BOE.10.000092"],["dc.identifier.eissn","2156-7085"],["dc.identifier.issn","2156-7085"],["dc.identifier.pmid","30775085"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77770"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.issn","2156-7085"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","biomedical tomography"],["dc.title","Multiscale x-ray phase-contrast tomography in a mouse model of transient focal cerebral ischemia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","111130N"],["dc.bibliographiccitation.firstpage","21"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Eckermann, Marina"],["dc.contributor.author","Töpperwien, Mareike"],["dc.contributor.author","Ruhwedel, Torben"],["dc.contributor.author","Möbius, Wiebke"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.editor","Müller-Myhsok, Bertram"],["dc.contributor.editor","Wang, Geng"],["dc.date.accessioned","2020-03-10T15:20:27Z"],["dc.date.available","2020-03-10T15:20:27Z"],["dc.date.issued","2019"],["dc.description.abstract","In the present work, we evaluate and compare the contrast and resolution obtained on different neuronal tissues with propagation-based x-ray phase contrast computed tomography (PB-CT). At our laboratory-based liquid metal-jet setup, we obtain overview datasets at sub-micron resolution of mm3 -sized volumes. In order to evaluate these parameters down to the sub-cellular level, we utilize the synchrotron endstation GINIX at P10, DESY. At this dedicated endstation1 developed and operated by our group, we utilize x-ray waveguide optics for highresolution cone-beam scans at strong geometrical magnification M. Exploiting this multi-scale approach, we investigate the image quality of cerebellum tissue treated by different heavy-metal stains. In addition, we study the electron density contrast in unstained tissues. Different embedding media are utilized depending on the stain, which also significantly affects contrast and image quality. With this work, we want to contribute to an optimized sample preparation to study the neuronal architecture of the brain tissue in greater detail in three dimensions (3d). © (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only."],["dc.identifier.doi","10.1117/12.2528432"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/63286"],["dc.language.iso","en"],["dc.relation.eventend","2019-08-15"],["dc.relation.eventlocation","San Diego, California, United States"],["dc.relation.eventstart","2019-08-11"],["dc.relation.isbn","978-1-5106-2919-6"],["dc.relation.isbn","978-1-5106-2920-2"],["dc.relation.ispartof","Proc. SPIE 11113"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","biomedical tomography"],["dc.title","Evaluation of different heavy-metal stains and embedding media for phase contrast tomography of neuronal tissue"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]