0000000000082761

AUTHOR

H. V. Zitzewitz

showing 2 related works from this author

Vergleich radiologischer Verfahren zur präoperativen Beurteilung der Verankerungsfestigkeit von Wirbelsäulenimplantaten

1997

PURPOSE To compare three techniques with regards to their ability to estimate pull out strength of spinal fusion hardware. MATERIAL AND METHODS VDS-screw fixation strength in 50 human cadaveric vertebral bodies was approximated by means of pull out force measurement. Bone quality was assessed by Dual X-ray Absorptiometry (DXA). Quantitative Computed Tomography (QCT) and T2*-relaxation time. For each of these techniques, correlation with axial pull out force strength was investigated. RESULTS Highest correlation was found for cancellous bone density measured by QCT (r = 0.72; p < 0.001). Immediately followed by DXA (r = 0.70; p < 0.001), which involves all bone components. Inverted T2*-relax…

musculoskeletal diseasesMaterials sciencemedicine.diagnostic_testbusiness.industrymedicine.medical_treatmentmedicine.anatomical_structureNuclear magnetic resonanceSpinal fusionBone qualitymedicineRadiology Nuclear Medicine and imagingCortical boneDual x-ray absorptiometryQuantitative computed tomographyCadaveric spasmNuclear medicinebusinessCancellous boneFixation (histology)RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren
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CT-Angiographie bei arterieller Verschlußkrankheit: Vergleich von 3 Rekonstruktionsverfahren

1997

Purpose To evaluate different rendering techniques of CT data for the assessment of long vessel segments in peripheral vascular occlusive disease. Material and methods 40 CT angiograms (aortoiliac: n = 20, leg arteries: n = 20) were viewed using three different rendering techniques: 1, maximum intensity projection (MIP); 2, volume rendering (VR); 3, shaded surface display (SSD). CT angiograms were obtained in 6 or 8 projections. Axial cross-section images were analysed using an interactive cine mode. Intraarterial DSA was the standard in all cases. Results The sensitivities for the diagnosis of occlusive disease were 100% (cross-section images), 94% (MIP), 91% (VR) and 93% (SSD). The specif…

medicine.medical_specialtymedicine.diagnostic_testbusiness.industryVascular diseaseVolume renderingIterative reconstructionmedicine.diseaseRendering (computer graphics)Maximum intensity projectionArterial Occlusive DiseasesAngiographyMedicineRadiology Nuclear Medicine and imagingRadiologyTomographybusinessRöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren
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