Search results for "Radio"
showing 10 items of 8895 documents
Evaluation von Nierenarterienstenosen: Vergleich von Angiographie mit invasiver Blutdruckmessung und Doppler-Sonographie
2000
Ziel: Der bei einer Nierenarterien-Angioplastie angiographisch gemessene Stenosegrad soll mit dem transstenotischen Blutdruck-Gradienten und dem prainterventionellen dopplersonographischen Befund verglichen werden. Methoden: Anhand von insgesamt 46 Nierenarterienstenosen bei 35 Patienten mit renovaskularer Hypertonie werden die angiographisch-morphologischen Befunde („linearer”, „geometrischer” und „densitometrischer” Stenosegrad) mit der invasiven transstenotischen Blutdruckmessung und den prainterventionellen Doppler-Befunden verglichen. Ergebnisse: Alle angiographisch bestimmten Stenosegrade korrelieren - masig - mit den transstenotischen Druckgradienten (Korrelationskoeffizienten: 0,67 …
Diagnostik der trachealen Instabilität: Spiral-CT in Inspiration und Exspiration und respiratorische cine-CT∗
2000
ry Spiral CT and Cine CT. Purpose: In tracheo- and broncho-malacia, localization and determination of collapse is necessary for planning a surgical procedure. We compared inspiratory and spiral CT, cine CT, and bronchoscopy and evaluated the relevance of each method. Methods: Seventeen patients with suspected or verified tracheal stonosis or collapse underwent paired inspiratory and exspiratory spiral CT and cine CT during continuous respiration (temporal increment 100 ms). The tracheal cross-sectional area was calculated and compared. Results : In addition to bronchoscopy, further information concerning localization, extent, collapse, stability of the tracheal wall, distal portions of the …
CT-Angiographie der Bronchialarterien
1994
Peut-on proposer un prélèvement du ganglion sentinelle en cas de chimiothérapie néoadjuvante dans les cancers du sein et à quel moment ?
2016
The main goal of preoperative chemotherapy is to reduce the size of the tumor and allow conservative treatment. Neoadjuvant treatment can affect axillary status with a downstaging in one third of the cases. For these patients, the benefit of axillary node dissection is questioned and the sentinel node biopsy (SLNB) seems to be a relevant option. However, the timing of performing SLNB is still debated especially for clinical negative patients with negative axillary ultrasound before preoperative chemotherapy. For axillary positive nodes proved by biopsy/cytology before preoperative chemotherapy, SLNB can be an option if there is a good clinical and radiological response.
Significance of ultrasound for the diagnosis of hypertrophic pyloric stenosis
1986
The sonographic features of hypertrophic pyloric stenosis (HPS) were evaluated in a 5-year prospective study (1981–1985) at the University Clinic of Pediatric Surgery in Mainz. In 37 cases real-time ultrasound was performed preoperatively to measure muscle thickness, diameter, and length of the pylorus; the recorded values were compared with those of a control group. Muscular wall thickness proved to be the most reliable parameter, while pyloric canal length was the most difficult measurement to obtain. Diameter alone was not adequate to establish the sonographic diagnosis, which depends on the individually and functionally different luminal width and submucosal thickness. Significant sonog…
Parametric assessment of myocardial perfusion by densitometric evaluation of digital subtraction coronary angiograms: a comparison with tomographic T…
2002
Densitometric results about local myocardial perfusion are compared with those derived from a quantitative analysis of TL-201 single photon emission computer tomograms (TL-201 SPECT). Ten patients underwent conventional TL-201 SPECT at rest and after maximum bicycle stress and dipyridamole infusion the day prior to the investigation. SPECT was applied to provide improved spatial resolution for the detection of perfusion abnormalities. During the catheterization procedure four digital subtraction coronary angiograms were performed, two of the left and two of the right coronary artery both before and after pharmacologically induced hyperemia by intracoronary papaverine. The densitometric para…
P275 Development and reliability of the new endoscopic virtual chromoendoscopy score: the PICaSSO score (the Paddington International Virtual Chromoe…
2017
258 Right heart wall motion and volume analysis in severe chronic pulmonary hypertension using realtime three dimensional echocardiography compared t…
2003
Intravascular Ultrasound-based Imaging Modalities for Tissue Characterisation
2014
Atherosclerosis is the leading cause of cardiovascular mortality and morbidity in the developed world. Intravascular ultrasound (IVUS) is a widely used imaging modality providing complementary diagnostic information to angiography regarding the vessel wall of the coronary arteries. IVUS has been used for assessment of ambiguous angiographic lesions, evaluation of new interventional devices and in atherosclerosis progression-regression trials. However, the standard gray-scale IVUS has limited value for the accurate identification of specific plaque components. This limitation has been partially over- come by introduction of new IVUS-based imaging methods such as: virtual histology IVUS, iMAP…
Image-Guided Mini-Invasive Treatments for Vascular and Oncologic Diseases: Embolization Therapy
2020
Transcatheter Embolization, also called Embolotherapy, is a mini-invasive, non-surgical therapeutic solution used in Interventional Radiology to close blood vessels deliberately. A wide range of embolic agents is available in clinical practice, including metal coils and liquid agents. More recent advances in biomaterials such as shape-memory foam and in-situ gelling solutions have led to the development of new pre-clinical embolic agents. This review offers a brief overview of current and emerging technologies in the field of endovascular embolization. The focus is on devices, materials and techniques.