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Schwarz F, Ramanauskaite A, Wetzel W, Mayer S, Obreja K, Parvini P. Clinical outcomes following a combined vertical and horizontal alveolar ridge augmentation and two-stage implant placement using either autogenous tooth roots or autogenous bone blocks. Clin Implant Dent Relat Res 2024; 26:369-375. [PMID: 38177089 DOI: 10.1111/cid.13299] [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: 08/30/2023] [Revised: 10/24/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024]
Abstract
AIM To assess and compare the short-term clinical outcomes following a combined vertical and horizontal alveolar ridge augmentation and two-stage implant placement using either autogenous tooth roots (TR) or autogenous bone blocks (AB). MATERIALS AND METHODS A total of n = 27 patients (TR/AB: 13/14) exhibiting n = 31 implants (TR/AB: 14/17) were available for the analysis. Each subject had been allocated to a combined vertical and horizontal alveolar ridge augmentation using either (1) healthy TR (e.g., retained wisdom teeth), or (2) monocortical AB harvested from the retromolar area (i.e. external oblique line). Clinical parameters (e.g., bleeding on probing, BOP; probing pocket depth, PD; mucosal recession, MR) were recorded after a follow-up period of 16.03 ± 4.3 months following implant placement. RESULTS The survival rates amounted to 100% in both groups. TR and AB grafted sites were associated with similar changes in mean BOP (8.97 ± 27.73%; 11.90 ± 18.97%), PD (0.53 ± 0.49; 0.47 ± 0.67 mm), and MR (0.03 ± 0.13; 0.0 ± 0.02 mm) values. The incidence of peri-implant mucositis and peri-implantitis at the patient level amounted to 15.38% and 0.0% in the TR-, and 28.57% and 7.14% in the AB group. CONCLUSIONS Both surgical procedures were associated with peri-implant tissue health and stability on the short-term.
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Affiliation(s)
- F Schwarz
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
| | - A Ramanauskaite
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
| | - W Wetzel
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
| | - S Mayer
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
| | - K Obreja
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
| | - P Parvini
- Goethe University, Department of Oral Surgery and Implantology, Frankfurt, Germany
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Krug R, Schwarz F, Dullin C, Leontiev W, Connert T, Krastl G, Haupt F. Removal of fiber posts using conventional versus guided endodontics: a comparative study of dentin loss and complications. Clin Oral Investig 2024; 28:192. [PMID: 38438798 PMCID: PMC10912265 DOI: 10.1007/s00784-024-05577-7] [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: 01/04/2024] [Accepted: 02/24/2024] [Indexed: 03/06/2024]
Abstract
OBJECTIVES To compare the efficacy of fiber post removal using conventional (CONV) versus guided endodontics (GE) in terms of dentin loss, residual resin material, procedural errors, and working time in vitro. MATERIAL AND METHODS Ninety human central incisors were root-filled and scanned by micro-computed tomography (CT), then restored with fiber posts and composite. Twenty-four sets of teeth with up to four human maxillary central incisors were fabricated and divided into three groups: conventional post removal by a general dentist (CG) or endodontology specialist (CS) and guided endodontics (GE) by a general dentist, yielding 30 teeth per operator and group. After treatment, the prepared access cavities were volumetrically assessed by micro-CT. Statistical significance was evaluated by one-way analysis of variance followed by post hoc comparisons with Tukey's HSD test and Pearson's chi-squared test for independence. RESULTS Both CONV and GE resulted in dentin loss and residual resin material. CS resulted in more dentin loss and less residual resin material than CG and GE (p < .05). All groups had some deviations from the original root canal but no perforations. The shortest working time was observed in the GE group. CONCLUSIONS Compared to the conventional freehand technique, GE resulted in significantly less radicular dentin loss, a few deviations but no perforations. CLINICAL RELEVANCE Guided endodontics can improve the speed and safety of fiber post removal without root perforation.
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Affiliation(s)
- R Krug
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany.
| | - F Schwarz
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - C Dullin
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
| | - W Leontiev
- Department of Periodontology, Endodontology and Cariology, University Center for Dental Medicine, University of Basel, Basel, Switzerland
| | - T Connert
- Department of Periodontology, Endodontology and Cariology, University Center for Dental Medicine, University of Basel, Basel, Switzerland
| | - G Krastl
- Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - F Haupt
- Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Göttingen, Germany
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Rippel K, Luitjens J, Habeeballah O, Scheurig-Muenkler C, Bette S, Braun F, Kroencke TJ, Schwarz F, Decker JA. Evaluation of ECG-Gated, High-Pitch Thoracoabdominal Angiographies With Dual-Source Photon-Counting Detector Computed Tomography. J Endovasc Ther 2024:15266028241230943. [PMID: 38380529 DOI: 10.1177/15266028241230943] [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] [Indexed: 02/22/2024]
Abstract
PURPOSE The aim of this study was to evaluate the radiation dose, image quality, and the potential of virtual monoenergetic imaging (VMI) reconstructions of high-pitch computed tomography angiography (CTA) of the thoracoabdominal aorta on a dual-source photon-counting detector-CT (PCD-CT) in comparison with an energy-integrating detector-CT (EID-CT), with a special focus on low-contrast attenuation. METHODS Consecutive patients being referred for an electrocardiogram (ECG)-gated, high-pitch CTA of the thoracoabdominal aorta prior to transcatheter aortic valve replacement (TAVR), and examined on the PCD-CT, were included in this prospective single-center study. For comparison, a retrospective patient group with ECG-gated, high-pitch CTA examinations of the thoracoabdominal aorta on EID-CT with a comparable scan protocol was matched for gender, body mass index, height, and age. Virtual monoenergetic imaging reconstructions from 40 to 120 keV were performed. Enhancement and noise were measured in 7 vascular segments and the surrounding air as mean and standard deviation of CT values. The radiation dose was noted and signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Finally, a subgroup analysis was performed, comparing VMI reconstructions from 40 keV to 70 keV in patients with at least a 50% decrease in contrast attenuation between the ascending aorta and femoral arteries. RESULTS Fifty patients (mean age 77.0±14.5 years; 31 women) were included. The radiation dose was significantly lower on the PCD-CT (4.2±1.4 vs. 7.2±2.2 mGy; p<0.001). With increasing keV, vascular noise, SNR, and CNR decreased. Intravascular attenuation was significantly higher on VMI at levels from 40 to 65, compared with levels of 120 keV (p<0.01 and p<0.005, respectively). On the PCD-CT, SNR was significantly higher in keV levels 40 and 70 (all p<0.001), and CNR was higher at keV levels 40 and 45 (each p<0.001), compared with scans on the EID-CT. At VMI ≤60 keV, image noise was also significantly higher than that in the control group. The subgroup analysis showed a drastically improved diagnostic performance of the low-keV images in patients with low-contrast attenuation. CONCLUSION The ECG-gated CTA of the thoracoabdominal aorta in high-pitch mode on PCD-CT have significantly lower radiation dose and higher objective image quality than EID-CT. In addition, low-keV VMI can salvage suboptimal contrast studies, further reducing radiation dose by eliminating the need for repeat scans. CLINICAL IMPACT ECG-gated CT-angiographies of the thoracoabdominal aorta can be acquired with a lower radtiation dose and a better image quality by using a dual-source photon-countinge detector CT. Furthermore, the inherent spectral data offers the possiblity to improve undiagnostic images and thus saves the patient from further radiation and contrast application.
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Affiliation(s)
- K Rippel
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - J Luitjens
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - O Habeeballah
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - C Scheurig-Muenkler
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - Stefanie Bette
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - Franziska Braun
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
| | - T J Kroencke
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
- Centre for Advanced Analytics and Predictive Sciences, University of Augsburg, Augsburg, Germany
| | - F Schwarz
- DONAUISAR Klinikum Deggendorf, Deggendorf, Germany
| | - J A Decker
- Diagnostic and Interventional Radiology, Faculty of Medicine, University Hospital Augsburg, University of Augsburg, Augsburg, Germany
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Schwarz F, Klee E, Schenk P, Katscher S, Schnake KJ, Bäumlein M, Zimmermann V, Schmeiser G, Scherer MA, Müller M, Sprengel K, Spiegl U, Osterhoff G, Schramm S, Siekmann H, Franck A, Scheyerer MJ, Ullrich BW. Impact of Anxiety During Hospitalization on the Clinical Outcome of Patients With Osteoporotic Thoracolumbar Vertebral Fracture. Global Spine J 2023:21925682231192847. [PMID: 37549640 DOI: 10.1177/21925682231192847] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/09/2023] Open
Abstract
STUDY DESIGN Multicenter prospective cohort study. OBJECTIVES Anxiety in combination with osteoporotic vertebral compression fractures (OVCFs) of the spine remains understudied. The purpose of this study was to analyze whether anxiety has an impact on the short-term functional outcome of patients with an OVCF. Furthermore, a direct impact of the fracture on the patient's anxiety during hospitalization should be recognized. METHODS All inpatients with an OVCF of the thoracolumbar spine from 2017 to 2020 were included. Trauma mechanism, analgetic medication, anti-osteoporotic therapy, timed-up-and-go test (TuG), mobility, Barthel index, Oswestry-Disability Index (ODI) and EQ5D-5L were documented.For statistical analysis, the U test, chi-square independence test, Spearman correlation, General Linear Model for repeated measures, Bonferroni analysis and Wilcoxon test were used. The item anxiety/depression of the EQ5D-5L was analyzed to describe the patients' anxiousness. RESULTS Data from 518 patients from 17 different hospitals were evaluated. Fracture severity showed a significant correlation (r = .087, P = .0496) with anxiety. During the hospital stay, pain medication (P < .001), anti-osteoporotic medication (P < .001), and initiation of surgical therapy (P < .001) were associated with less anxiety. The anxiety of a patient at discharge was negatively related to the functional outcomes at the individual follow-up: TuG (P < .001), Barthel index (P < .001), ODI (P < .001) and EQ5D-5L (P < .001). CONCLUSIONS Higher anxiety is associated with lower functional outcome after OVCF. The item anxiety/depression of the EQ5D-5L provides an easily accessible, quick and simple tool that can be used to screen for poor outcomes and may also offer the opportunity for a specific anxiety intervention.
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Affiliation(s)
- F Schwarz
- Department of Neurosurgery, University Hospital Jena, Jena, Germany
| | - E Klee
- Department of Neurosurgery, University Hospital Jena, Jena, Germany
| | - P Schenk
- Department of Science and Research, BG Clinic Bergmannstrost Halle (Saale), Halle, Deutschland
| | - S Katscher
- Interdisciplinary Center for Spine and Neurotrauma, Sana Clinic Borna, Borna, Germany
| | - K J Schnake
- Interdisciplinary Center for Spinal and Scoliosis Surgery, Waldkrankenhaus Erlangen, Erlangen, Germany
- Department of Orthopaedics and Traumatology, Paracelsus Private Medical University Nuremberg, Nuremberg, Germany
| | - M Bäumlein
- Department of Orthopaedics and Traumatology, University Hospital Marburg, Marburg, Germany
| | - V Zimmermann
- Department of Trauma and Orthopedic Surgery, Klinikum Traunstein, Traunstein, Germany
| | - G Schmeiser
- Department of Spinal Surgery, Schön Clinic Hamburg Eilbek, Hamburg, Germany
| | - M A Scherer
- Medical Practice Clinic Orthopedics and Surgery Munich West, Munich, Germany
| | - M Müller
- Department of Orthopaedics and Traumatology, University Hospital Kiel, Kiel, Germany
| | - K Sprengel
- Department of Traumatology, Hirslanden Clinic St. Anna, University of Lucerne, Lucerne, Switzerland
- Department of Traumatology, University Hospital Zurich (USZ), University of Zurich, Zurich, Switzerland
| | - U Spiegl
- Department of Orthopaedics, Traumatology and Plastic Surgery, University Hospital Leipzig, Leipzig, Germany
| | - G Osterhoff
- Department of Orthopaedics, Traumatology and Plastic Surgery, University Hospital Leipzig, Leipzig, Germany
| | - S Schramm
- Department of Trauma and Orthopaedic Surgery, University Hospital Erlangen, Erlangen, Germany
| | - H Siekmann
- Department of Traumatology and Reconstructive Surgery, AMEOS Klinikum Halberstadt, Halberstadt, Germany
| | - A Franck
- Department of Orthopaedics and Traumatology, Regiomed-Clinic of Coburg, Coburg, Germany
| | - M-J Scheyerer
- Department of Orthopaedics and Traumatology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - B W Ullrich
- Department of Traumatology and Reconstructive Surgery, BG Clinic Bergmannstrost Halle (Saale), Halle, Germany
- Department of Hand, Trauma- and Reconstructive Surgery, University Hospital Jena, Jena, Germany
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Rippel K, Decker JA, Wudy R, Trzaska T, Haerting M, Kroencke TJ, Schwarz F, Scheurig-Muenkler C. Evaluation of run-off computed tomography angiography on a first-generation photon-counting detector CT scanner - Comparison with low-kVp energy-integrating CT. Eur J Radiol 2023; 158:110645. [PMID: 36525704 DOI: 10.1016/j.ejrad.2022.110645] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/23/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE To assess the overall imaging performance (radiation dose and image quality) of a photon-counting detector CT (PCD-CT) in comparison with a state-of-the-art energy-integrating detector CT (EID-CT) in run-off CTAs. METHODS Consecutive patients who underwent run-off CTA on a PCD-CT were included (PCD-CT cohort). A retrospective cohort of patients who had undergone run-off CTA on an EID-CT was matched for gender, body mass index, height, and age (EID-CT cohort). Virtual monoenergetic imaging (VMI) reconstructions for various keV settings (40-120 keV) were generated. CT values and noise were semiautomatically measured for 13 vascular segments of the abdomen, pelvis, and lower extremities. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated for each segment. Subjective image quality was evaluated by two radiologists along the dimensions 'vessel attenuation', 'vessel sharpness', and 'overall image quality' using 5-point Likert scales. RESULTS Forty patients (age 70.9 ± 9.8 years; 14 women) were included in the PCD-CT cohort and matched with a corresponding number of EID-CT patients. Overall, there was an inverse correlation of signal and noise but also of SNR and CNR with keV levels used for VMI reconstructions. SNR and CNR in the 40 - 60 keV range exceeded EID-CT levels significantly. Subjective image quality was substantially higher at lower keV levels and showed no significant difference to EID-CT. CONCLUSION Low keV VMI reconstructions of run-off CTA scans on a PCD-CT result in substantially higher SNR and CNR than 80 kVp and 100 kVp EID-CT acquisitions with equal subjective image quality.
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Affiliation(s)
- K Rippel
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
| | - J A Decker
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
| | - R Wudy
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
| | - T Trzaska
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
| | - M Haerting
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
| | - T J Kroencke
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany; Centre for Advanced Analytics and Predictive Sciences (CAAPS), University of Augsburg, Universitätsstr. 2, 86159 Augsburg, Germany.
| | - F Schwarz
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany; Medical Faculty, Ludwig Maximilian University Munich, Bavariaring 19, 80336 Munich, Germany.
| | - C Scheurig-Muenkler
- Diagnostic and Interventional Radiology, University Hospital Augsburg, Faculty of Medicine, University of Augsburg, Stenglinstr. 2, 86156 Augsburg, Germany.
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Trimpou G, Schwarz F, Begić A, Hess P, Lermen J, Keim N, Obreja K, Parvini P. Clinical performance of immediately placed and restored progressive-type implants in the esthetic zone: a prospective observational study. Int J Implant Dent 2022; 8:57. [PMID: 36414824 PMCID: PMC9681970 DOI: 10.1186/s40729-022-00462-y] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/12/2022] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To assess implant success and survival of immediately placed and restored progressive-type implants in the esthetic zone. MATERIAL AND METHODS A total of n = 21 patients (21 implants) had received an immediate placement of a tapered, two-part implant with a progressive thread design (PL) for a single tooth replacement in the anterior maxilla. An immediate 'non full-functional loaded' restoration was provided upon adequate primary stability on a final patient-specific abutment (one abutment-one time concept). The final restoration was provided at 12 weeks (baseline). Implant survival and success (e.g. bleeding on probing-BOP, probing pocket depth-PD, mucosal recession-MR, pink esthetic score-PES) as well as patient- reported outcomes (PROM`S) were recorded at 6 and 12 months. RESULTS An adequate primary implant stability (i.e. insertion torque > 35 Ncm) was obtained at all but one sites. At 12 months, implant survival (n = 20 patients) amounted to 100%. Non-significant changes to baseline were noted for mean BOP (2.5 ± 28.2%), PD (- 0.26 ± 0.73 mm), and MR (0.0 ± 0.4 mm) values. PES values amounted to 12.9 ± 1.14 and 13.2 ± 0.84 at 6 and 12 months. Technical and mechanical complications were not observed. Patients expressed an overall high satisfaction. CONCLUSIONS The presented immediacy protocol was associated with high survival and success rates on the short-term.
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Affiliation(s)
- G. Trimpou
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - F. Schwarz
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - A. Begić
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - P. Hess
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - J. Lermen
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - N. Keim
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - K. Obreja
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
| | - P. Parvini
- grid.7839.50000 0004 1936 9721Department of Oral Surgery and Implantology, Goethe University, Carolinum, Frankfurt, Germany
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Becker J, Bette S, Decker J, Braun F, Haerting M, Scheurig-Münkler C, Kroencke T, Schwarz F. Spektrale Differenzierung zystischer Nierenläsionen in Kontrast-verstärkten Abdomen-Scans an einem Photon-Counting Detector CT – erste Erfahrungen. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749913] [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: 11/05/2022]
Affiliation(s)
- J Becker
- Universitätsklinikum Augsburg, Klinik für diagnostische und interventionelle Radiologie, Augsburg
| | - S Bette
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - J Decker
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - F Braun
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - M Haerting
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - C Scheurig-Münkler
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - T Kroencke
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Augsburg, Augsburg
| | - F Schwarz
- Klinik für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universiätsklinikum Augsburg, Augsburg
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Decker J, Risch F, Woźnicki P, Braun F, Bette S, Scheurig-Münkler C, Kröncke T, Schwarz F. Virtuell-monoenergetische Rekonstruktionen bei koronaren CT-Angiographien an einem Photon-Counting Detector CT – Vergleich mit herkömmlicher Energy-Integrating Detector Technologie. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749816] [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: 11/06/2022]
Affiliation(s)
- J Decker
- Universitätsklinikum Augsburg, Radiologie, Augsburg
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Popp D, Sinzinger XA, Decker AJ, Bette S, Braun F, Rippel K, Wollny C, Scheurig-Münkler C, Kröncke JT, Schwarz F. Spektrale Metallartefakt-Reduktion an Photon-Counting Detektor CT-Datensätzen am Beispiel von Spondylodesematerial. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749857] [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: 11/07/2022]
Affiliation(s)
- D Popp
- Universitätsklinikum Augsburg, Radiologie, Augsburg
| | - X A Sinzinger
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - A J Decker
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - S Bette
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - F Braun
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - K Rippel
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum, Augsburg
| | - C Wollny
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - C Scheurig-Münkler
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - J T Kröncke
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
| | - F Schwarz
- Klinik für Diagn. und Interv. Radiologie, Universitätsklinikum Augsburg, Augsburg
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Decker J, Bette S, Lubina N, Rippel K, Braun F, Woznicki P, Wollny C, Scheurig-Münkler C, Kröncke T, Schwarz F. Niedrigdosis-CT des Abdomens: Erste Erfahrungen mit einem Photon-Counting-Detector CT und Vergleich mit einem modernen Energy-Integrating Detector-CT. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749911] [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: 11/06/2022]
Affiliation(s)
- J Decker
- Universitätsklinikum Augsburg, Radiologie, Augsburg
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Gorodetska I, Offermann A, Püschel J, Lukiyanchuk V, Gaete D, Kurzyukova A, Labitzky V, Schwarz F, Lange T, Knopf F, Wielockx B, Krause M, Perner S, Dubrovska A. OC-0426 ALDH genes as regulators of prostate cancer radioresistance, stemness and bone metastases. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02562-2] [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: 10/18/2022]
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Peitzsch C, Schniewind S, Schwarz F, Richter S, Linge A, Löck S, Hadiwikarta W, Nowrouzi A, Baumann M, Krause M, Dubrovska A, Kurth I. OC-0448: Epigenetic regulation and cellular plasticity in response to irradiation in head and neck cancer. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00470-9] [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: 10/22/2022]
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Mihatovic I, Schwarz F, Obreja K, Becker J, Sader R, Dard M, John G. Staged implant placement after defect regeneration using biphasic calcium phosphate materials with different surface topographies in a minipig model. Clin Oral Investig 2020; 24:3289-3298. [PMID: 31980922 DOI: 10.1007/s00784-020-03206-7] [Citation(s) in RCA: 1] [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: 08/26/2019] [Accepted: 01/07/2020] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To assess the influence of biphasic calcium phosphate materials with different surface topographies on bone formation and osseointegration of titanium implants in standardized alveolar ridge defects. MATERIALS AND METHODS Standardized alveolar ridge defects (6 × 6 mm) were created in the mandible of 8 minipigs and filled with three biphasic calcium phosphate materials (BCP1-3, 90% tricalcium phosphate/10% hydroxyapatite) with different surface properties (micro- and macroporosities) as well as a bovine-derived natural bone mineral (NBM) as a control. At 12 weeks, implants were placed into the augmented defects. After further 8 weeks of healing, dissected blocks were processed for histological analysis (e.g., mineralized (MT), residual bone graft material (BS), bone-to-implant contact (BIC)). RESULTS All four biomaterials showed well-integrated graft particles and new bone formation within the defect area. MT values were comparable in all groups. BS values were highest in the NBM group (21.25 ± 13.52%) and markedly reduced in the different BCP groups, reaching statistical significance at BCP1-treated sites (9.2 ± 3.28%). All test and control groups investigated revealed comparable and statistically not significant different BIC values, ranging from 73.38 ± 20.5% (BCP2) to 84.11 ± 7.84% (BCP1), respectively. CONCLUSION All bone graft materials facilitated new bone formation and osseointegration after 12 + 8 weeks of healing.
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Affiliation(s)
- I Mihatovic
- Department of Oral Surgery and Central Admittance, University Hospital, Heichrich-Heine-University, Düsseldorf, Germany
| | - F Schwarz
- Department of Oral Surgery and Implantology, Carolinum, Goethe University, Frankfurt, Germany.
| | - K Obreja
- Department of Oral Surgery and Implantology, Carolinum, Goethe University, Frankfurt, Germany
| | - J Becker
- Department of Oral Surgery and Central Admittance, University Hospital, Heichrich-Heine-University, Düsseldorf, Germany
| | - R Sader
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Frankfurt am Main, Germany
| | - M Dard
- Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University, College of Dental Medicine, New York, USA
| | - G John
- Department of Oral Surgery and Central Admittance, University Hospital, Heichrich-Heine-University, Düsseldorf, Germany
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Ramanauskaite A, Becker K, Kassira HC, Becker J, Sader R, Schwarz F. The dimensions of the facial alveolar bone at tooth sites with local pathologies: a retrospective cone-beam CT analysis. Clin Oral Investig 2019; 24:1551-1560. [PMID: 31414272 DOI: 10.1007/s00784-019-03057-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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] [Received: 04/16/2019] [Accepted: 08/08/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To assess the impact of various local pathologies on facial alveolar bone dimensions at tooth sites. MATERIALS AND METHODS Cone-beam computed tomography images of 60 patients were analyzed. Healthy teeth and teeth with local pathologies (i.e., endodontically treated, periodontally diseased teeth, and teeth with periapical lesions) were included. The thickness of the facial alveolar bone was measured at five locations: (1) the bone crest (W0), (2) 25% (W25), (3) 50% (W50), (4) 75% (W75) of the distance from the bone crest to the root apex (A), and (5) in the A region (W100). The results were considered statistically significant at p < 0.0008 (adjustment according to the statistical correction for multiple testing). RESULTS A total of 1174 teeth (707 healthy and 467 with the local pathologies) were assessed. Periodontally diseased maxillary premolars and anterior teeth in the mandible in the W0 position, as well as maxillary molars in the W25 position, tended to have a lower facial bone thickness when compared to the healthy teeth (0.68 mm vs. 0.84 mm, p = 0.008; 0.47 mm vs. 0.55 mm, p = 0.004; and 1.27 mm vs. 1.72 mm; p = 0.009, respectively). In contrast, the observed tendency pointed towards thicker facial bone wall for the periodontally diseased mandibular anterior teeth in the W50 position (0.74 vs. 0.52, p = 0.001). Healthy maxillary molars tended to display a thicker facial alveolar bone compared to the teeth with local pathologies in the W25, W50, and W75 positions (p = 0.001, p = 0.005, and p = 0.004, respectively). CONCLUSIONS The present analysis has indicated that local pathologies are commonly associated with a compromised socket morphology. CLINICAL RELEVANCE The facial bone thickness was particularly reduced at periodontally diseased teeth, which may challenge implant therapy.
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Affiliation(s)
- Ausra Ramanauskaite
- Department of Oral Surgery and Implantology, Carolinum Goethe University, Theodor-Stern-Kai 7; Building 29, 60596, Frankfurt am Main, Germany.
- Department of Oral Surgery, Universitätsklinikum Düsseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany.
| | - K Becker
- Department of Oral Surgery and Implantology, Carolinum Goethe University, Theodor-Stern-Kai 7; Building 29, 60596, Frankfurt am Main, Germany
- Department of Orthodontics, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | | | - J Becker
- Department of Oral Surgery, Universitätsklinikum Düsseldorf, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - R Sader
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Theodor-Stern-Kai 7, Haus 29, 60596, Frankfurt am Main, Germany
| | - F Schwarz
- Department of Oral Surgery and Implantology, Carolinum Goethe University, Theodor-Stern-Kai 7; Building 29, 60596, Frankfurt am Main, Germany
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Ramanauskaite A, Sahin D, Sader R, Becker J, Schwarz F. Efficacy of autogenous teeth for the reconstruction of alveolar ridge deficiencies: a systematic review. Clin Oral Investig 2019; 23:4263-4287. [DOI: 10.1007/s00784-019-02869-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/19/2019] [Indexed: 02/03/2023]
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Schwarz F, Weymann I, von Delft J, Weichselbaum A. Nonequilibrium Steady-State Transport in Quantum Impurity Models: A Thermofield and Quantum Quench Approach Using Matrix Product States. Phys Rev Lett 2018; 121:137702. [PMID: 30312054 DOI: 10.1103/physrevlett.121.137702] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 12/21/2017] [Indexed: 06/08/2023]
Abstract
The numerical renormalization group (NRG) is tailored to describe interacting impurity models in equilibrium, but it faces limitations for steady-state nonequilibrium, arising, e.g., due to an applied bias voltage. We show that these limitations can be overcome by describing the thermal leads using a thermofield approach, integrating out high energy modes using NRG, and then treating the nonequilibrium dynamics at low energies using a quench protocol, implemented using the time-dependent density matrix renormalization group. This yields quantitatively reliable results for the current (with errors ≲3%) down to the exponentially small energy scales characteristic of impurity models. We present results of benchmark quality for the temperature and magnetic field dependence of the zero-bias conductance peak for the single-impurity Anderson model.
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Affiliation(s)
- F Schwarz
- Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 München, Germany
| | - I Weymann
- Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
| | - J von Delft
- Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 München, Germany
| | - A Weichselbaum
- Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 München, Germany
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
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Becker H, Breitenlohner H, Lang C, Schwarz F. Computer in der Pathologie: Methodik und Erfahrungen nach Auswertung von 27000 Sektionsprotokollen. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1635965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Beschreibung eines Befunddokumentationssystems, das als Ergebnis einer seit 3 Jahren durchgeführten elektronischen Verarbeitung von Sektionsdaten zur Zeit 27669 Sektionsfälle mit rund 350000 Diagnosen aus 13 Jahren (1952—1964) umfaßt. Diese Diagnosen werden routinemäßig ausgewertet und folgende Ergebnisse den Pathologen laufend zur Verfügung gestellt:Eine Diagnosenkartei mit Diagnosen im Klartext und allen einschlägigen Fällen; eine Kinderdiagnosenund Todesursachenkartei j eine Auflistung aller Verkehrsund Arbeitsunfälle sowie schließlich der Sektionsfälle mit multiplen primären Malignomen und Spätrezidiven.Neben diesen Standardauswertungen, die in mehreren Exemplaren im Institut aufliegen und jederzeit eine statistische Verwertung ohne maschinelle Hilfsmittel ermöglichen, können auch Sonderanfragen durch spezielle Programme beantwortet werden. Diese Programme ermöglichen das Auswerten von Fällen, die eine beliebige vorgegebene Kombination von Diagnosen und anderen Daten aufweisen oder nicht aufweisen. Die zutreffenden Fälle werden in übersichtlicher Form (nach Alter und Geschlecht geordnet) ausgedruckt. Bei Bedarf wird auch ein Altersdiagramm automatisch erstellt. Nach einer kurzen Darstellung der notwendigen vorbereitenden und auswertenden Programme folgen eine Diskussion der Fehler, ihrer Entstehung und Korrektur, sowie Angaben über den apparativen und zeitlichen Aufwand.Das beschriebene Dokumentationssystem liefert dem anfragenden Arzt frei lesbare Diagnosentexte, so daß er keinerlei Entschlüsselung vorzunehmen hat. Auf Grund des entwickelten PATH-KWIC(KWIC = Key-Word in Context) Programms können sämtliche Diagnosen nach alphabetisch geordneten Stichworten’ (lexikographisch) ausgedruckt werden.
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Baumann A, Winter K, Garthe T, Thäns N, Bock J, Schindler R, Bischoff B, Trumm C, Reiser M, Schwarz F. Systolische Akquisition bei High-Pitch CT-Angiografien zur TAVI-Planung – Wie gut gelingt das und wann besser nicht? ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600229] [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 Baumann
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - K Winter
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - T Garthe
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - N Thäns
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - J Bock
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - R Schindler
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - B Bischoff
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - C Trumm
- Institut für Klinische Radiologie, LMU München, Campus Großhadern, Radiologie, München
| | - M Reiser
- Institut für Klinische Radiologie, LMU München, Radiologie, München
| | - F Schwarz
- Klinik für Diagnostische Radiologie und Neuroradiologie, Radiologie, Augsburg
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Berndt B, Tessonnier T, Schwarz F, Bauer J, Wuerl M, Kamp F, Thieke C, Belka C, Verhaegen F, Reiser M, Sommer W, Dedes G, Landry G, Parodi K. TH-CD-202-05: DECT Based Tissue Segmentation as Input to Monte Carlo Simulations for Proton Treatment Verification Using PET Imaging. Med Phys 2016. [DOI: 10.1118/1.4958160] [Citation(s) in RCA: 2] [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: 11/07/2022] Open
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Hudobivnik N, Schwarz F, Johnson T, Dedes G, Tessonnier T, Verhaegen F, Thieke C, Belka C, Sommer W, Parodi K, Landry G. MO-FG-CAMPUS-JeP1-04: Evaluating DECT Vs SECT Range Differences in Proton Therapy Using Clinical Data. Med Phys 2016. [DOI: 10.1118/1.4957341] [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: 11/07/2022] Open
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Weiss M, Schwarz F, Wallmichrath J, Baumeister R, Frick A, Bartenstein P, Rominger A. Chylothorax and chylous ascites. Clinical utility of planar scintigraphy and tomographic imaging with SPECT/CT. Nuklearmedizin 2015; 54:231-40. [PMID: 26183818 DOI: 10.3413/nukmed-0723-15-02] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 02/06/2015] [Accepted: 07/09/2015] [Indexed: 11/20/2022]
Abstract
UNLABELLED The aim was to analyze conventional planar scintigraphy and SPECT/CT in patients clinically suspicious for chylothorax or chylous ascites. Lymphoscintigraphy was performed for two reasons: first, to help diagnose chylothorax or -abdomen, by demonstrating diffuse uptake in fluid accumulations, and then secondly, to detect the site of leakage to test the prediction that additional use of SPECT/CT-technique improves upon the diagnostic value of planar lymphoscintigraphy in the baseline detection of thoraco-abdominal lymphatic disorders. PATIENTS, MATERIAL, METHODS From 7/2008-7/2014 a total of 24 consecutive patients (8 woman, 16 men; age, range 31-79 years) presenting with clinical symptoms suspicious for chylothorax and/or chylous ascites were examined by planar lymphoscintigraphy (n = 26) and additional tomographic SPECT/CT- (n = 22) or SPECT-technique (n = 2). RESULTS Chylothorax could be scintigraphically confirmed in n = 9, chylous ascites in n = 5 scintigraphies, and excluded in n = 10 patients. In all planar scintigraphy findings of pathological lymph drainage regions (n = 14), SPECT/CT delivered additional relevant information, notably the anatomic localization of the lymphatic leakage. For the baseline detection of thoraco-abdominal lymphatic transport disorders, lymphoscintigraphy showed sensitivity of 88%, specificity of 100%, positive predictive value of 100%, and negative predictive value of 80%. CONCLUSIONS Our findings show that due to the particular advantages presented by tomographic separation of overlapping sources, SPECT/CT specifies better the anatomical sites, improving the localization of lymphatic leakage in aid of planning surgical re-interventions.
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Affiliation(s)
- M Weiss
- Mayo Weiss MD, Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Marchioninistr.15, 81377 Muenchen, Germany, Tel. +49/(0)89/440 07 76 38, E-mail:
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Pomschar A, Moritz K, Schwarz F, Kümpfel T, Braun F, Reiser M, Ertl-Wagner B. Vergrößerte Adenoide bei Patienten mit Multipler Sklerose. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551181] [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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Thijssen JH, Poortman J, Schwarz F, de Waard F. Post-menopausal estrogen production, with special reference to patients with mammary carcinoma. Front Horm Res 2015; 3:45-62. [PMID: 791698 DOI: 10.1159/000398266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Mihatovic I, Payer M, Bertrams M, Vasiliu D, Schwarz F, Becker J, Stratul S. Bone tissue response to an oily calcium hydroxide suspension in tibial defects. An experimental pilot study in minipigs. J Craniomaxillofac Surg 2014; 42:1171-7. [DOI: 10.1016/j.jcms.2014.02.004] [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] [Received: 07/17/2013] [Revised: 12/09/2013] [Accepted: 02/10/2014] [Indexed: 11/29/2022] Open
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Jochheim D, Schneider VS, Schwarz F, Kupatt C, Lange P, Reiser M, Massberg S, Gutiérrez-Chico JL, Mehilli J, Becker HC. Contrast-induced acute kidney injury after computed tomography prior to transcatheter aortic valve implantation. Clin Radiol 2014; 69:1034-8. [PMID: 25017451 DOI: 10.1016/j.crad.2014.05.106] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 05/16/2014] [Accepted: 05/23/2014] [Indexed: 11/29/2022]
Abstract
AIM To identify independent predictors of contrast medium-induced acute kidney injury (CI-AKI) after enhanced multidetector-row computed tomography (MDCT) prior to transcatheter aortic valve implantation (TAVI) in high-risk patients. MATERIALS AND METHODS The present single-centre study analysed retrospectively 361 patients who were assessed using MDCT prior to TAVI. CI-AKI was defined as an increase in serum creatinine (SCr) of ≥ 25% or ≥ 0.5 mg/dl in at least one sample over baseline (24 h before MDCT) and at 24, 48, and 72 h after MDCT. RESULTS A total of 38 patients (10.5%) experienced CI-AKI. As compared to patients without CI-AKI, they presented more frequently with estimated glomerular filtration rate (eGFR) <60 ml/min/1.73 m(2), (81.6% versus 64.4%, p = 0.045) and tended to receive higher volumes of iodinated contrast media (ICM; 55.3% versus 39%, p = 0.057). There was a significant interaction between baseline eGFR and the amount of intravenous ICM administered (pfor interaction = <0.001) identifying the amount of ICM >90 ml as independent predictive factor of CI-AKI only in patients with baseline eGFR <60 ml/min/1.73m(2) (OR 2.615; 95% CI: 1.21-5.64). CONCLUSION One in ten elderly patients with aortic stenosis undergoing MDCT to plan a TAVI procedure experienced CI-AKI after intravenous ICM injection. Intravenous administration of <90 ml of ICM reduces this risk in patients with or without pre-existing impaired renal function. However, in the majority of patients renal function recovers before the TAVI procedure.
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Affiliation(s)
- D Jochheim
- Cardiology Department, Munich University Clinic, Germany.
| | - V-S Schneider
- Radiology Department, Munich University Clinic, Germany
| | - F Schwarz
- Radiology Department, Munich University Clinic, Germany
| | - C Kupatt
- Cardiology Department, Munich University Clinic, Germany
| | - P Lange
- Cardiology Department, Munich University Clinic, Germany
| | - M Reiser
- Radiology Department, Munich University Clinic, Germany
| | - S Massberg
- Cardiology Department, Munich University Clinic, Germany
| | | | - J Mehilli
- Cardiology Department, Munich University Clinic, Germany
| | - H-C Becker
- Radiology Department, Munich University Clinic, Germany
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Ritter L, Elger MC, Rothamel D, Fienitz T, Zinser M, Schwarz F, Zöller JE. Accuracy of peri-implant bone evaluation using cone beam CT, digital intra-oral radiographs and histology. Dentomaxillofac Radiol 2014; 43:20130088. [PMID: 24786136 DOI: 10.1259/dmfr.20130088] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The present study assesses the accuracy of three-dimensional (3D) cone beam CT (CBCT) and intra-oral radiography (CR) in visualizing peri-implant bone compared with histology. METHODS 26 titanium dental implants were placed in dog jaws with chronic type vestibular defects. After a healing period of 2 and 8 weeks (n = 12 dogs) the animals were sacrificed. CBCT scans and CR of the specimen were recorded. Dissected blocks were prepared, and histomorphometric analysis was performed. Both modalities were measured twice by two observers and compared with histomorphometry regarding bone levels and thickness around implants as well as length and diameter of implants. RESULTS Measurements of CBCT correlated well with histomorphometry of the vestibular bone level, oral bone thickness and implant length (all p-values <0.05). Compared with histomorphometry, the mean differences between CBCT and histomorphometry were between 0.06 and 2.61 mm. Mesial bone level (MBL) and distal bone level (DBL) were underestimated by both CR and CBCT. CR and histology measurements were only significantly correlated for implant length measurements. All intraclass correlations were highly significant. CONCLUSIONS 3D CBCT provides usable information about bone in all dimensions around implants with varying accuracy. CR and CBCT perform similar in assessing MBL and DBL, but, within its limits, the CBCT can assess oral and buccal bone. Metallic artefacts limit the visualization quality of bone around implants and further research could elucidate the value of post-processing algorithms. When information about osseous perforation of implants is needed, CBCT may still provide clinically valuable information.
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Affiliation(s)
- L Ritter
- 1 Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, North Rhine-Westphalia, Germany
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Pomschar A, Alperin N, Schwarz F, Körte I, Reiser M, Ertl-Wagner B. Wie beeinflusst die Angulation des Halses die MR-basierte Quantifizierung des jugular venösen Blutflusses? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373355] [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: 10/25/2022]
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Zinsser D, Nagel JM, Cyran CC, Schwarz F. [Spontaneous dissection of the superior mesentery artery: a rare cause of acute abdomen]. ROFO-FORTSCHR RONTG 2014; 186:1035-6. [PMID: 24648239 DOI: 10.1055/s-0034-1366225] [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: 10/25/2022]
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29
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Schwarz F, Reiser MF. [Cardiac valve diseases]. Radiologe 2013; 53:856. [PMID: 24068291 DOI: 10.1007/s00117-012-2466-1] [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: 11/28/2022]
Affiliation(s)
- F Schwarz
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität, Marchioninistr. 15, 81377, München, Deutschland,
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Ivanovic A, Bosshardt DD, Mihatovic I, Schwarz F, Gruber R, Sculean A. Effect of pulverized natural bone mineral on regeneration of three-wall intrabony defects. A preclinical study. Clin Oral Investig 2013; 18:1319-1328. [PMID: 23982444 DOI: 10.1007/s00784-013-1089-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 08/11/2013] [Indexed: 01/12/2023]
Abstract
AIMS The objective of this study is to evaluate the effects of a paste-like bone substitute material with easy handling properties and improved mechanical stability on periodontal regeneration of intrabony defects in dogs. MATERIALS AND METHODS Mandibular and maxillary first and third premolars were extracted, and three-wall intrabony defects were created on second and fourth premolars. After a healing period of 3 months, acute type defects were filled with a paste-like formulation of deproteinized bovine bone mineral (DBBM) (particle size, 0.125-0.25 mm) in a collagenous carrier matrix (T1), pulverized DBBM (particle size, 0.125-0.25 mm) without the carrier (T2), or Bio-Oss® granules (particle size, 0.25-1.00 mm) as control (C). All defects were covered with a Bio-Gide® membrane. The dogs were sacrificed after 12 weeks, and the specimens were analyzed histologically and histometrically. RESULTS Postoperative healing of all defects was uneventful, and no histological signs of inflammation were observed in the augmented and gingival regions. New cementum, new periodontal ligament, and new bone were observed in all three groups. The mean vertical bone gain was 3.26 mm (T1), 3.60 mm (T2), and 3.81 mm (C). That of new cementum was 2.25 mm (T1), 3.88 mm (T2), and 3.53 mm (C). The differences did not reach statistical significance. The DBBM particles were both incorporated in new bone and embedded in immature bone marrow. CONCLUSIONS The results of this preclinical study showed that the 0.125-0.25-mm DBBM particles in a powder or paste formulation resulted in periodontal regeneration comparable to the commercially available DBBM. Osteoconductivity, in particular, was not affected by DBBM size or paste formulation. CLINICAL RELEVANCE The improved handling properties of the paste-like bone substitute consisting of small DBBM particles embedded in a collagen-based carrier hold promise for clinical applications.
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Affiliation(s)
- A Ivanovic
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - D D Bosshardt
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.,Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Robert K. Schenk Laboratory of Oral Histology, School of Dental University of Bern, Bern, Switzerland
| | - I Mihatovic
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany
| | - F Schwarz
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany
| | - R Gruber
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.,Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Laboratory of Oral Cell Biology, School of Dental University of Bern, Bern, Switzerland
| | - A Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
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Schwarz F, Schwab F, Beckmann BM, Schuessler F, Zinsser D, Gölz T, Kääb S, Reiser MF, Theisen D. [Magnetic resonance imaging of hypertrophic cardiomyopathy : evaluation of diastolic function]. Radiologe 2013; 53:15-23. [PMID: 23338245 DOI: 10.1007/s00117-012-2381-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Hypertrophic cardiomyopathy (HCM) has a prevalence of approximately 0.2% and is clinically asymptomatic in many patients or presents with unspecific symptoms. This explains the importance of imaging for the diagnosis of HCM as well as for the assessment of the clinical course. The definitive finding in HCM is myocardial hypertrophy with thickening of the ventricular wall ≥ 15 mm. While echocardiography is an excellent screening tool magnetic resonance imaging (MRI) allows a comprehensive analysis of the heart in HCM. This includes a detailed analysis of the distribution and extent of myocardial hypertrophy, a thorough evaluation of systolic and diastolic cardiac function, the assessment of the presence and extent of dynamic outflow tract obstruction as well as the description of the systolic anterior motion (SAM) phenomenon of the mitral valve with secondary mitral insufficiency. When contrast material is administered, additional information about myocardial perfusion as well as the presence and extent of myocardial fibrosis can be obtained. This study compared systolic functional parameters as well as end systolic and end diastolic wall thickness of patients with and without diastolic dysfunction.
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Affiliation(s)
- F Schwarz
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität München, Campus Grosshadern, Deutschland.
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Schwarz F, Roden M, Fritsche A, Müssig K. Seltene Ursache rezidivierender Hypoglykämien bei Diabetes mellitus Typ 1 - Fall 6/2013. Dtsch Med Wochenschr 2013; 138:1470. [DOI: 10.1055/s-0033-1343305] [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: 10/26/2022]
Affiliation(s)
- F. Schwarz
- Klinik für Endokrinologie und Diabetologie, Universitätsklinikum Düsseldorf
| | - M. Roden
- Klinik für Endokrinologie und Diabetologie, Universitätsklinikum Düsseldorf
| | - A. Fritsche
- Abteilung für Endrokrinologie, Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Universitätsklinikum Tübingen, Mitglied des Deutschen Zentrums für Diabetesforschung (DZD e.V.)
| | - K. Müssig
- Klinik für Endokrinologie und Diabetologie, Universitätsklinikum Düsseldorf
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Schwarz F, Bayer-Karpinska A, Poppert H, Buchholz M, Cyran C, Grimm J, Helck A, Nikolaou K, Opherk C, Dichgans M, Saam T. Serial carotid MRI identifies rupture of a vulnerable plaque resulting in amaurosis fugax. Neurology 2013; 80:1171-2. [DOI: 10.1212/wnl.0b013e31828869ad] [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: 11/15/2022] Open
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Braunagel M, Schwarz F, Knösel T, Reiser MF, Graser A. [Unclear abdominal tumor in pulmonary lymphangioleiomyomatosis]. Radiologe 2012. [PMID: 23178789 DOI: 10.1007/s00117-012-2414-0] [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: 10/27/2022]
Affiliation(s)
- M Braunagel
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität München, Campus Grosshadern, Deutschland.
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Schwarz F, Roden M, Müssig K. Neues zur Pathobiochemie der diabetischen Dyslipidämie. Diabetologe 2012. [DOI: 10.1007/s11428-012-0888-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zengel P, Schrötzlmair F, Schwarz F, Paprottka P, Kramer M, Berghaus A, Clevert DA. Elastography: a new diagnostic tool for evaluation of obstructive diseases of the salivary glands; primary results. Clin Hemorheol Microcirc 2012; 50:91-9. [PMID: 22538538 DOI: 10.3233/ch-2011-1446] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE Obstructive diseases of the salivary glands, a common problem in the ENT field, are often based on sialolithiasis but can also result from rare circumstances. Due to recent technical innovations, there has been significant development in the treatment of obstructive diseases of the salivary glands such that minimally invasive glandula-sustaining therapy has now become standard. However, there is still no effective technique to assess and monitor the recovery of the parenchyma of the gland. As a result, recurrent infections often lead to modification of the gland in which fibrosis increases and the gland becomes coarse. After treatment, the parenchyma of the gland is able to recover. Thus, to more effectively monitor and promote the success of treatment, we have developed a new method to measure and quantify the stiffness of the glandula tissue using elastography (Virtual Touch TM Application) to assess the degree of recovery. MATERIALS AND METHODS First, we collected elastography data from 30 healthy volunteers as part of a conventional ultrasound (Siemens, ACUSON, S 2000, Germany) with a multi-frequency linear 9 MHz transducer in order to determine if normal findings are sufficiently quantifiable. We subsequently measured patients with sialolithiasis of the submandibular gland. RESULTS For healthy volunteers, the average value was 1.96 ± 0.48 m/s for the glandula submandibularis and 2.66+/- 0.89 for the parotid gland, a statistically significant difference. For patients with sialolithiasis of the submandibular gland, the average value was 2.98 ± 0.4 m/s, a highly significant difference in comparison to the healthy side of the patient. CONCLUSION Elastography is an easy to use diagnostic method that shows promise to become a valuable tool for the assessment of disease severity as it provides the possibility to quantify the level of treatment benefit for the patient.
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Affiliation(s)
- P Zengel
- Department of Otorhinolaryngology, Head and Neck Surgery, Grosshadern Medical Center, Ludwig-Maximilians-University of Munich, Germany.
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Sager M, Ferrari D, Wieland M, Dard M, Becker J, Schwarz F. Immunohistochemical characterization of wound healing at two different bone graft substitutes. Int J Oral Maxillofac Surg 2012; 41:657-66. [DOI: 10.1016/j.ijom.2011.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 10/07/2009] [Accepted: 11/08/2011] [Indexed: 01/13/2023]
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Grimm JM, Schindler A, Schwarz F, Cyran C, Dichgans M, Freilinger T, Reiser MF, Nikolaou K, Saam T. Identifikation von symptomatischen atherosklerotischen Karotisplaques: Vergleich zwischen CT Angiographie und Black-Blood 3T MRT. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311227] [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: 10/28/2022]
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Saam T, Schwarz F, Karpinska A, Poppert H, Opherk C, Cyran C, Nikolaou K, Seiler C, Reiser MF, Clevert DA, Dichgans M. Carotid Plaque Imaging in Acute Stroke (CAPIAS): Eine multizentrische Studie (www.clinicaltrials.gov NCT01284933). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311228] [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: 10/28/2022]
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Bamberg F, Theisen D, Bauner K, Hildebrandt K, Marcus R, Greif M, Schwarz F, Johnson TR, Reiser MF, Becker A, Nikolaou K. Stress-induzierte Myokardiale Perfusionsuntersuchung mittels Dynamischer CT: Diagnostische Genauigkeit im Vergleich zur Kardialen MRT. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311095] [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: 10/28/2022]
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Abstract
With the introduction of second generation ultrasound contrast agents, contrast-enhanced ultrasound (CEUS) has become available as an adjunct to the conventional FAST (focused assessment with sonography in trauma) protocol and B-mode sonography of the abdomen after blunt force abdominal trauma. Results from several controlled studies indicate excellent diagnostic accuracy of CEUS for the exclusion of clinically relevant parenchymal injuries after blunt force abdominal trauma. Particularly in younger, hemodynamically stable patients this technique could contribute to a reliable exclusion of parenchymal injuries without the use of ionizing radiation. This report provides details on the technical performance of CEUS, shows examples of typical CEUS findings after blunt abdominal trauma and summarizes the current clinical evidence regarding the use of CEUS after blunt abdominal trauma.
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Affiliation(s)
- F Schwarz
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität, Campus Großhadern, Marchioninistr. 15, 81377 München.
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Abstract
Abdominal ultrasound (US) is often the first-line imaging modality used to assess focal liver lesions. Due to various new gray-scaled US techniques, such as tissue harmonic imaging (THI), spatial compounding technique and speckle reduction technique, as well as contrast-enhanced techniques, abdominal ultrasound nowadays has great potential regarding detection and characterization of focal liver lesions. Furthermore, image fusion with computed tomography (CT), magnetic resonance imaging (MRI) and 3D ultrasound will most likely help to improve clinical management before and after interventional procedures. This article illustrates the principles and clinical impact of recently developed techniques in the field of ultrasound.
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Affiliation(s)
- D-A Clevert
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität, Campus Grosshadern, München, Deutschland.
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Bischoff B, Bamberg F, Schwarz F, Reiser M, Nikolaou K. Optimales Timing für die myokardiale first-pass one-shot CT-Perfusion. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300901] [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: 10/14/2022]
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Schwarz F, Sandner T, Marcus R, Baloch E, Hinkel R, Reiser M, Johnson T, Nikolaou K, Bamberg F. Comparison of Assessment of Myocardial Perfusion by CT-based Dynamic Myocardial Perfusion Imaging and Single-Phase High-Pitch Acquisitions in a Porcine Animal Model with Various Degrees of Coronary Artery Stenosis. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300919] [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: 10/14/2022]
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Schwarz F, Lange P, Goelz T, Grandl K, Nikolaou K, Reiser M, Kupatt C, Becker C. Wide-range CT-Angiografie mit hohem Pitchfaktor – Dosisreduktion durch höhere Kontrastmittelkonzentration. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300887] [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: 10/14/2022]
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Photiadis J, Schwarz F, Sinzobahamvya N, Haun C, Schindler E, Hraska V, Asfour B. Excellent midterm survival after rapid ECMO support after the modified Norwood Operation. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297419] [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: 10/14/2022]
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Schwab F, Schwarz F, Dietrich O, Nikolaou K, Reiser M, Theisen D. Free Breathing Real-Time Functional Cardiac Imaging at 3 Tesla. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1295502] [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: 10/14/2022]
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Schwarz F, Treitl M, Grimm J, Cyran C, Nikolaou K, Reiser M, Saam T. The relationship between plaque imaging characterization and treatment modality selection. Interv Cardiol 2011. [DOI: 10.2217/ica.11.67] [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: 11/21/2022] Open
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Abstract
Nowadays, endosseous titanium implants must be considered as an evidence-based treatment concept for the replacement of missing teeth. The economic evaluation of scientific evidence suggests that patient satisfaction and oral health-related quality of life may be improved by mandibular implant-retained overdentures over conventional dentures. However, despite promising survival rates reported for dental implants, an increase in the prevalence of peri-implant diseases is emerging. Accordingly, concepts for quality management in education, research, and practice are essential to further improve medical care in implant dentistry.
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Affiliation(s)
- F Schwarz
- Poliklinik für Zahnärztliche Chirurgie und Aufnahme, Westdeutsche Kieferklinik, Heinrich Heine Universiät, Düsseldorf, Deutschland.
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Schwarz F, Lange P, Bamberg F, Nikolaou K, Reiser M, Boekstegers P, Becker C. Anatomie des Aortenannulus bei Patienten mit hochgradiger Aortenstenose - Implikationen für die Messung mittels rotierender C-Arm-Tomographie. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279152] [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: 10/18/2022]
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