0000000000195032

AUTHOR

Frank Schön

showing 3 related works from this author

Quantitative comparison of new image processing methods for volumetric analysis of left ventricular contrast echocardiograms

2003

An effort has been made to develop image processing methods which allow a definite and precise tracking of the borderline of the ventricle in two-dimensional echocardiograms. Experience is reported with two new methods, which are based on the gray-level rise (GL) and the signal-to-noise ratio (SNR) in combined heart-phase-triggered image series. A quantitative comparison of these time-series methods is presented with respect to the interpretation of a single native image (noncontrast image), a single contrast-material image, the corresponding subtraction image, and the corresponding color superposition image. The comparison is based on the calculation of the ejection fraction using the abov…

Image SeriesComputer sciencebusiness.industrymedia_common.quotation_subjectSubtractionImage processingSuperposition principleSignal-to-noise ratio (imaging)Computer Science::Computer Vision and Pattern RecognitionMedical imagingContrast (vision)Computer visionArtificial intelligencebusinessImage resolutionmedia_common[1989] Proceedings. Computers in Cardiology
researchProduct

Patient documentation for the ultrasound laboratory

1991

The development of a PC based system for the storage of patient data in the echocardiography laboratory is described. Special design objectives were low cost and user friendliness, including an integrated special query language. After 3 years of use, the system stores 80000 diagnoses from 12000 patients without any relevant slowdown of response. Future developments concerning the communication between the database system and an echocardiographic sector scanner are discussed.

DocumentationSpecial designMultimediaComputer scienceDatabase fileArchival storagePatient dataUser friendlinessMedical diagnosisQuery languagecomputer.software_genrecomputer
researchProduct

Tomographic left ventricular volume determination in the presence of aneurysm by three-dimensional echocardiographic imaging. I: Asymmetric model hea…

1996

To improve the accuracy of measurements of left ventricular volume in the presence of an aneurysm, we used three-dimensional echocardiographic imaging to analyze the shape of left ventricles in 23 asymmetric model hearts with eccentric aneurysms of different sizes, shapes, and localizations. A standard 3.75 MHz ultrasound probe with a rotation motor device was used to obtain a three-dimensional data set. By rotating the probe stepwise 1 degree, 180 radial ultrasound pictures were digitized. On the basis of the three-dimensional data set, the following parameters were determined and compared with the dimensions of the model hearts obtained by direct measurement: total left ventricular volume…

medicine.medical_specialtybusiness.industryCardiac VolumeHeart VentriclesUltrasoundEchocardiography Three-DimensionalModels CardiovascularLeft Ventriclesmedicine.diseaseBiplaneAneurysmStandard errorUltrasound probeEchocardiographyLinear regressionmedicineHumansVentricular volumeRadiology Nuclear Medicine and imagingRadiologyHeart AneurysmCardiology and Cardiovascular MedicineNuclear medicinebusinessMathematicsJournal of the American Society of Echocardiography
researchProduct