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Glaser C, Heuck A. Kniegelenk, MR-Anatomie, Normvarianten und Pitfalls. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Heuck A, Schmitt R, Glaser C. FFF Muskuloskelettale Radiologie - Gelenkdiagnostik. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1345845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Heuck A, Glaser C. Postoperative Diagnostik des Kniegelenks. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1345961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pietschmann M, Horng A, Glaser C, Albrecht D, Bruns J, Scheffler S, Marlovits S, Angele P, Aurich M, Bosch U, Fritz J, Frosch K, Kolombe T, Richter W, Petersen J, Nöth U, Niemeyer P, Jagodzinsky M, Kasten P, Ruhnau K, Müller P. Nachbehandlung bei der autologen Chondrozytentransplantation. Unfallchirurg 2012. [DOI: 10.1007/s00113-012-2293-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lattanzi R, Petchprapa C, Glaser C, Dunham K, Mikheev AV, Krigel A, Mamisch TC, Kim YJ, Rusinek H, Recht M. A new method to analyze dGEMRIC measurements in femoroacetabular impingement: preliminary validation against arthroscopic findings. Osteoarthritis Cartilage 2012; 20:1127-33. [PMID: 22771774 DOI: 10.1016/j.joca.2012.06.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 05/02/2012] [Accepted: 06/21/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To validate a new method to analyze delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) measurements in the hip for early assessment of cartilage defects in femoroacetabular impingement (FAI). METHODS We performed a retrospective review of 10 hips in 10 FAI patients, who underwent hip arthroscopy. T1-weighted images and dGEMRIC T(1) maps were acquired at 1.5 T on coronal planes, including the anterior-superior, superior, posterior-superior hip cartilage. For all slices, a region of interest (ROI) was defined over the central portion of the femoral cartilage, assumed to be healthy, and T1 values (x) were transformed to standard scores (z) using z = (x -μ)/σ, where μ and σ are the average and standard deviation of T1 in the femoral ROI. Diagnostic performance of the resulting standardized dGEMRIC maps was evaluated against intraoperative findings and compared with that of a previously proposed dGEMRIC analysis as well as morphologic assessment. RESULTS Assuming z = -2 or z = -3 as the threshold between normal and degenerated cartilage, sensitivity, specificity and accuracy were 88%, 51% and 62%, and 71%, 63% and 65%, respectively. By using T1 = 500 ms as single threshold for all dGEMRIC T1 maps, these values became 47%, 58% and 55%, whereas they were 47%, 79% and 70% for morphologic evaluation. CONCLUSIONS Standardized dGEMRIC can increase the sensitivity in detecting abnormal cartilage in FAI and has the potential to improve the clinical interpretation of dGEMRIC measurements in FAI, by removing the effect of inter- and intra-patient T1 variability.
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Glaser C. Traumatische und posttraumatische Veränderungen des Kniegelenks. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1310759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Glaser C. Fuß. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1310989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Arnoldi A, Weckbach S, Nussbickel C, Horng A, Nöbauer I, Zysk S, Reiser M, Glaser C. MRT-basierte Knorpelvolumetrie nach Kreuzbandersatzplastik in Korrelation mit qualitativen Gelenkveränderungen und dem klinischen Outcome. Gibt es Hinweise auf frühzeitige posttraumatische degenerative Veränderungen? ROFO-FORTSCHR RONTG 2011; 183:1138-44. [DOI: 10.1055/s-0031-1281685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Glaser C. Kniegelenk: Berufsbedingte Schädigung? ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1278953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Horng A, Weckbach S, Notohamiprodjo M, Raya J, Münkel M, Reiser MF, Glaser C. Interscanner-Variabilität der T2-Relaxationszeit des Tibiaknorpels bei 1,5T und 3T. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Horng A, Raya J, Zscharn M, Hoehne-Hückstädt U, Hermanns I, Glitsch U, Ellegast R, Hering H, Reiser MF, Glaser C. Lokoregionale Belastungszonen des Gelenkknorpels im gesamten Knie nach Belastung in unterschiedlichen Flexionsgraden mit 3D-MR-Volumetrie bei 3T. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Notohamiprodjo M, Pedersen M, Glaser C, Helck AD, Lodemann KP, Jespersen B, Fischereder M, Reiser MF, Sourbron SP. Vergleich von Gd-DTPA und Gd-BOPTA für die Untersuchung der Perfusion und Filtration der Niere. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Glaser C. Postoperative Diagnostik. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1278939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Raya J, Horng A, Krasnokutsky S, Dietrich O, Beltran L, Reiser M, Recht M, Glaser C. In Vivo DTI des Retropatellarknorpels bei 7 T: Ist es machbar, was sehen wir, sehen wir eventuell mehr als bisher? - Erste Ergebnisse von Gesunden und Befunde bei Arthrose. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Saam T, Habs M, Pollatos O, Cyran C, Pfefferkorn T, Dichgans M, Dietrich O, Glaser C, Reiser MF, Nikolaou K, Nikolauo K. High-resolution black-blood contrast-enhanced T1 weighted images for the diagnosis and follow-up of intracranial arteritis. Br J Radiol 2011; 83:e182-4. [PMID: 20739338 DOI: 10.1259/bjr/74101656] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Primary arteritis of the central nervous system (CNS) comprises a heterogeneous group of CNS disorders, which is characterised by non-atheromatous inflammation and necrosis of the arterial wall. The clinical presentation is highly variable, with stroke being the most common manifestation. Conventional angiography is considered to be the best imaging tool for diagnosing the disease. However, angiographic findings, which usually show lumen irregularities and stenosis, are often unspecific and can occur with a variety of other vascular disorders, such as atherosclerosis and arterial dissection. Therefore, brain biopsies are often needed to confirm the diagnosis. Recent reports have shown that MRI is able to visualise contrast enhancement in subjects with known primary CNS arteritis.
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Diemoz PC, Coan P, Zanette I, Bravin A, Lang S, Glaser C, Weitkamp T. A simplified approach for computed tomography with an X-ray grating interferometer. OPTICS EXPRESS 2011; 19:1691-8. [PMID: 21368982 DOI: 10.1364/oe.19.001691] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We present a simplified acquisition and processing method for X-ray grating interferometry computed tomography (CT). The proposed approach eliminates the need to scan the gratings, thus allowing for a faster CT acquisition compared to methods presently in use. The contrast in the reconstructed images can be expressed as a linear combination of the absorption and refraction within the sample. Experimental images of a test phantom made of known materials and a human bone-cartilage sample prove the correctness of the method and show very good agreement with the theory. The here proposed approach might be highly interesting in many fields where a reduced imaging acquisition time is requested and/or where the radiation dose delivered to the sample has to be kept low, such as, for example, in in-vivo imaging.
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Horng A, Raya J, Zscharn M, König L, Notohamiprodjo M, Pietschmann M, Hoehne-Hückstädt U, Hermanns I, Glitsch U, Ellegast R, Hering K, Reiser M, Glaser C. [Locoregional deformation pattern of the patellar cartilage after different loading types - high-resolution 3D-MRI volumetry at 3 T in-vivo]. ROFO-FORTSCHR RONTG 2010; 183:432-40. [PMID: 21113866 DOI: 10.1055/s-0029-1245790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE To analyze locoregional deformation patterns indicative of contact areas in patellar cartilage after different loading exercises. MATERIALS AND METHODS 7 healthy patellae were examined in-vivo before and immediately after standardized loading (kneeling, squatting or knee bends) and after 90 minutes of rest using a sagittal 3D-T1-w FLASH WE sequence (22 msec/ 9.8 msec/ 15°/ 0.3 × 0.3 × 1.5 mm³) at 3 T. After cartilage segmentation and 3D reconstruction, voxel-based and global precision errors (PR) were calculated. The former were used to determine significant differences in local cartilage thickness. Voxel-based 2σ-thickness difference maps were calculated to visualize locoregional deformation patterns. Global changes in volume (Vol), mean thickness (mTh) and cartilage-bone-interface area (CBIA) were calculated. RESULTS The voxel-based PR depended on cartilage thickness (D) ranging from 0.12 - 0.35 mm. For D ≥ 1 mm the RF was < 0.31 mm (< voxel size), and for D ≥ 2 mm, the RF was < 0.22 mm. The global PR was 83 mm³ (2.4 %) for Vol, 0.06 mm (2.0 %) for mTh and 16 mm² (1.4 %) for CBIA. The focal cartilage deformation equaled 14 % of the local thickness reduction. The deformation areas were oval and located in the peripheral medial (more vertically oriented, all exercises) and caudo-lateral (more horizontally oriented, kneeling and knee bends) aspects of the patella and were least pronounced in knee bends. Significant changes for Vol/mTh ranged from 2.1 to 3.7 %. CONCLUSION This MRI-based study is the first to identify in-vivo voxel-based patellar cartilage deformation patterns indicating contact and loading zones after kneeling and squatting. These zones are anatomically and functionally plausible and may represent areas where stress induced degeneration and subsequent OA can originate. The data may facilitate understanding of individual knee loading properties and help to improve and validate biomechanical models for the knee.
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Röhnisch J, Glaser C, Behrens S, Maier B, Schühlen H, Schöller R, Theres H. 10 years of data collected in the Berlin Myocardial Infarction Registry (BMIR) – Changes in treatment and outcome for patients with acute myocardial infarction. DAS GESUNDHEITSWESEN 2010. [DOI: 10.1055/s-0030-1266640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Glaser C, Trommershauser J, Mamassian P, Maloney L. Comparison of distortions of probability information in three stochastic tasks: Visual, visuo-motor and decision making under risk. J Vis 2010. [DOI: 10.1167/9.8.1102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Notohamiprodjo M, Horng A, Kuschel B, Bär P, Reiser M, Glaser C. Hochaufgelöste Knie-MRT mit einer optimierten 3D-TSE-Sequenz bei 3T mit einer 15-Kanal-Spule. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Horng A, Pietschmann M, Notohamiprodjo M, Müller P, Reiser M, Glaser C. Artefaktreduktion der Schulter-MRT durch rotierende K-Raum Auslese bei 3T – Analyse von 80 Patienten. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Notohamiprodjo M, Horng M, Kuschel B, Bär P, Reiser M, Glaser C. Eine 3D-TSE-Sequenz für Bildgebung des Sprunggelenks bei 3T- Ein neuer Blickwinkel? ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Glaser C. Osteonekrose am Knie und Sprunggelenk. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ingrisch M, Morhard D, Sourbron S, Kümpfel T, Gerdes LA, Reiser M, Glaser C. Perfusion und Permeabilität bei Multipler Sklerose: Messung mit dynamischer kontrastverstärkter MRT. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Horng A, Raya J, Zscharn M, Hoehne-Hueckstaedt U, Hermanns I, Glitsch U, Ellegast R, Reiser M, Glaser C. Lokoregionäre patellare Knorpeldeformation nach Belastung – Analyse mit 3D-MR-Volumetrie bei 3T. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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