Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Keywords: evaluation ; Germany ; imaging ; QUANTIFICATION ; SYSTEM ; SYSTEMS ; VOLUME ; NEW-YORK ; ACCURACY ; SURGERY ; validation ; FLOW ; magnetic resonance ; MAGNETIC-RESONANCE ; magnetic resonance imaging ; VECTORS ; VECTOR ; SURFACE ; RECONSTRUCTION ; COLOR DOPPLER ; LACKING ; VOLUMES ; AORTIC REGURGITATION ; CARDIOVASCULAR-SYSTEM ; CONTROL-VOLUME METHOD ; INTEGRATION ; MITRAL REGURGITATION ; QUANTITATIVE ASSESSMENT ; resonance imaging ; respiratory system ; STANDARD ; VALVULAR REGURGITATION ; VELOCITY
    Abstract: Background. Three-dimensional assessment of regurgitant jet volume is the prerequisite for stratifying valve insufficiency. However, systematic comparison of three-dimensional methods is lacking. Therefore, we evaluated magnetic resonance imaging and three-dimensional echocardiography experimentally. Methods. An insufficiency chamber (22 x 18.5 x 27 cm; ostia 10, 16, and 20 mm; regurgitant volumes 2.3 to 25 mL) within experimental circulation (BioMedicus pump, tubes, pulsatile flow 0.2 to 1.9 L/min) was used for three-dimensional echocardiography (HP Sonos 2500) and magnetic resonance imaging (Siemens Magnetom Vision). Doppler flowmeter served as a gold standard. Segmentation used thresholding and surface integration of velocity vectors. jet volume was evaluated qualitatively by polynom fitting. Results. jet volume calculated by magnetic resonance (r = 0.99, p 〈 0.0001) and by echocardiography (r = 0.99, p 〈 0.0001) correlated identically to the gold standard. jet volume derived from imaging correlated with each other by r = 0.98 (p 〈 0.0001). Polynom fits indicated a more paraboloid shape of magnetic resonance jet volume. Conclusions. Experimentally, three-dimensional echocardiography and magnetic resonance imaging possess identical accuracy for determining regurgitant jet volume. Magnetic resonance imaging seems to provide qualitatively better image data for three-dimensional reconstruction. (C) 2004 by The Society of Thoracic Surgeons
    Type of Publication: Journal article published
    PubMed ID: 15223411
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 369 (1986), S. 847-847 
    ISSN: 1435-2451
    Keywords: Abdominal aortic aneurysm ; Diagnosis ; Indication ; Operations ; Bauchaortenaneurysma ; Diagnose ; Indikation ; Operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An der II. Chirurgischen Abteilung des AK Harburg wurden in 5 Jahren (1981–1985) 263 Patienten mit einem infrarenalen Bauchaortenaneurysma operiert. Im vorliegenden Film werden die Diagnostik beim Bauchaortenaneurysma, die Untersuchungstechnik und -taktik beim Hausarzt und in der Klinik vorgestellt sowie die Operation zweier Aneurysmen gezeigt. Postoperative Probleme, Risikofaktoren und Kontraindikationen zur Operation werden diskutiert.
    Notes: Summary At the 2nd Surgical Department of the Harburg General Hospital in Hamburg, Germany, 263 patients with infrarenal abdominal aortic aneurysms were operated on during a 5-year period from 1981 to 1985. The film demonstrates diagnostic procedures and evaluation techniques, as employed by the family physician and the clinician. Moreover, operations for two abdominal aneurysms are shown. Postoperative problems, risk factors, and contraindications against operative procedures are discussed.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...