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  1. AU="Krass, Stefan"
  2. AU="Patrick Connerton"
  3. AU="Lai, Jiaying"
  4. AU=Kalra Mannudeep K AU=Kalra Mannudeep K
  5. AU=Wright Zachary AU=Wright Zachary
  6. AU="Brakensiek, Stefan"
  7. AU="Akilov, Oleg"
  8. AU="Pavlish, April"
  9. AU="Kim, Joonhee"
  10. AU="Napp, Adriane"
  11. AU="Alchin, David Rhys"
  12. AU="Chenxiang Xi"
  13. AU="Alatawi, Mohammed Naif"
  14. AU="Jacquemet, Elise"
  15. AU="Cappelleri, Joseph C"
  16. AU="Frank, Samuel A"
  17. AU="Srensen, Henrik Toft"
  18. AU="Matteo Tosato"

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  1. Buch ; Audio / Video ; Dissertation / Habilitation: Beurteilung von krankhaften Veränderungen der Koronararterien auf Grund von Röntgenkontrastverfahren und intrakoronarem Ultraschallverfahren

    Krass, Stefan

    ein Methodenvergleich auf Grund quantitativer Kenngrößen

    (Fortschritt-Berichte VDI : Reihe 17, Biotechnik, Medizintechnik ; 179)

    1998  

    Serientitel Fortschritt-Berichte VDI : Reihe 17, Biotechnik, Medizintechnik ; 179
    Fortschritt-Berichte VDI
    Fortschritt-Berichte VDI ; Reihe 17, Biotechnik, Medizintechnik
    Überordnung Fortschritt-Berichte VDI
    Fortschritt-Berichte VDI ; Reihe 17, Biotechnik, Medizintechnik
    Schlagwörter Koronare Herzkrankheit ; Koronarographie ; Ultraschalldiagnostik
    Schlagwörter Sonographie ; Sonografie ; Ultrasonographie ; Ultrasonografie ; Koronarangiographie ; Koronarangiografie ; Koronare Angiographie ; Koronare Angiografie ; Angiokardiographie ; Angiokardiografie ; Kardioangiographie ; Kardioangiografie ; Angiocardiographie ; Herzkranzgefäßleiden ; Koronararterie ; Herzkranzgefäßkrankheit ; Coronary artery disease
    Sprache Deutsch
    Umfang IX, 114 S. : Ill., graph. Darst.
    Ausgabenhinweis Als Ms. gedr.
    Verlag VDI-Verl
    Erscheinungsort Düsseldorf
    Dokumenttyp Buch ; Audio / Video ; Dissertation / Habilitation
    Dissertation / Habilitation Mainz, Univ., Diss., 1998
    HBZ-ID HT010179592
    ISBN 3-18-317917-2 ; 978-3-18-317917-6
    Datenquelle Katalog ZB MED Medizin, Gesundheit

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  2. Artikel: Computer-assisted image-based risk analysis and planning in lung surgery - a review.

    Krass, Stefan / Lassen-Schmidt, Bianca / Schenk, Andrea

    Frontiers in surgery

    2022  Band 9, Seite(n) 920457

    Abstract: In this paper, we give an overview on current trends in computer-assisted image-based methods for risk analysis and planning in lung surgery and present our own developments with a focus on computed tomography (CT) based algorithms and applications. The ... ...

    Abstract In this paper, we give an overview on current trends in computer-assisted image-based methods for risk analysis and planning in lung surgery and present our own developments with a focus on computed tomography (CT) based algorithms and applications. The methods combine heuristic, knowledge based image processing algorithms for segmentation, quantification and visualization based on CT images of the lung. Impact for lung surgery is discussed regarding risk assessment, quantitative assessment of resection strategies, and surgical guiding. In perspective, we discuss the role of deep-learning based AI methods for further improvements.
    Sprache Englisch
    Erscheinungsdatum 2022-09-22
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2773823-1
    ISSN 2296-875X
    ISSN 2296-875X
    DOI 10.3389/fsurg.2022.920457
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Buch ; Online: Automatic segmentation of the pulmonary lobes with a 3D u-net and optimized loss function

    Lassen-Schmidt, Bianca / Hering, Alessa / Krass, Stefan / Meine, Hans

    2020  

    Abstract: Fully-automatic lung lobe segmentation is challenging due to anatomical variations, pathologies, and incomplete fissures. We trained a 3D u-net for pulmonary lobe segmentation on 49 mainly publically available datasets and introduced a weighted Dice loss ...

    Abstract Fully-automatic lung lobe segmentation is challenging due to anatomical variations, pathologies, and incomplete fissures. We trained a 3D u-net for pulmonary lobe segmentation on 49 mainly publically available datasets and introduced a weighted Dice loss function to emphasize the lobar boundaries. To validate the performance of the proposed method we compared the results to two other methods. The new loss function improved the mean distance to 1.46 mm (compared to 2.08 mm for simple loss function without weighting).

    Comment: MIDL2020 short paper
    Schlagwörter Electrical Engineering and Systems Science - Image and Video Processing ; Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Machine Learning
    Erscheinungsdatum 2020-05-29
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  4. Buch ; Online: VICORA-Pilotphase

    Kraß, Stefan / Lang, Markus

    fachlicher Schlussbericht

    2004  

    Abstract: Computer assistance, radiology, networks, research collaboration, surgical planning, tumor vitality, arteriosclerosis, lung diseases, liver ... ...

    Titelvarianten VICORA initial phase
    Verfasserangabe Stefan Kraß; Markus Lang
    Abstract Computer assistance, radiology, networks, research collaboration, surgical planning, tumor vitality, arteriosclerosis, lung diseases, liver surgery
    Sprache Deutsch
    Umfang Online-Ressource (26 S., 456 KB)
    Verlag Technische Informationsbibliothek u. Universitätsbibliothek ; MeVis
    Erscheinungsort Hannover ; Bremen u.a.
    Dokumenttyp Buch ; Online
    Anmerkung Förderkennzeichen BMBF 01EZ0010 - 01EZ0011 - 01EZ0012. - Verbund-Nr. 01018604. - Engl. Titel: VICORA initial phase ; IMD-Felder maschinell generiert ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  5. Buch: VICORA-Hauptphase

    Kraß, Stefan / Peitgen

    fachlicher Schlussbericht

    2007  

    Verfasserangabe [Autor des Berichts: Kraß, Stefan]. Zuwendungsempfänger: MeVis GmbH, Bremen (PL: Peitgen)
    Sprache Deutsch
    Umfang 36 Bl., Ill., graph. Darst.
    Verlag MeVis Research u.a.
    Erscheinungsort Bremen
    Dokumenttyp Buch
    Anmerkung Förderkennzeichen BMBF 01EZ0401/01EZ0403. - Verbund-Nr. 01018604 ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  6. Buch ; Online: VICORA - Hauptphase

    Haar, von der / Kraß, Stefan / Peitgen / Roggan

    fachlicher Schlussbericht

    2007  

    Verfasserangabe [Autor des Berichts: Kraß, Stefan]. Zuwendungsempfänger: MeVis GmbH, Bremen (PL: Prof. Dr. Peitgen); Siemens AG, Erlangen (PL: Dr. von der Haar); Celon AG, Teltow (PL: Dr. Roggan)
    Sprache Deutsch
    Umfang Online-Ressource (37 S., 804 KB), Ill., graph. Darst.
    Verlag Technische Informationsbibliothek u. Universitätsbibliothek ; MeVis Research u.a.
    Erscheinungsort Hannover ; Bremen
    Dokumenttyp Buch ; Online
    Anmerkung Förderkennzeichen BMBF 01EZ0401/01EZ0403. - Verbund-Nr. 01018604 ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  7. Buch ; Dissertation / Habilitation: Beurteilung von krankhaften Veränderungen der Koronararterien auf Grund von Röntgenkontrastverfahren und intrakoronarem Ultraschallverfahren

    Krass, Stefan

    ein Methodenvergleich auf Grund quantitativer Kenngrößen

    (Fortschritt-Berichte VDI : Reihe 17, Biotechnik/Medizintechnik ; 179)

    1998  

    Titelvarianten Veränderungen der Koronararterien
    Verfasserangabe Stefan Krass
    Serientitel Fortschritt-Berichte VDI : Reihe 17, Biotechnik/Medizintechnik ; 179
    Schlagwörter Koronarographie ; Koronare Herzkrankheit ; Ultraschalldiagnostik
    Sprache Deutsch
    Umfang IX, 114 S, Ill., graph. Darst, 21 cm
    Ausgabenhinweis Als Ms. gedr
    Verlag VDI-Verl
    Erscheinungsort Düsseldorf
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Zugl.: Diss
    Anmerkung Literaturverz. S. 107 - 114
    ISBN 3183179172 ; 9783183179176
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  8. Buch: VICORA-Pilotphase

    Kraß, Stefan / Lang, Markus

    fachlicher Schlussbericht

    2004  

    Titelvarianten VICORA initial phase
    Verfasserangabe Stefan Kraß; Markus Lang. Erstellt vom Centrum für Medizinische Diagnosesysteme und Visualisierung (MeVis)
    Sprache Deutsch
    Umfang 24 Bl
    Erscheinungsort Bremen
    Dokumenttyp Buch
    Anmerkung Förderkennzeichen BMBF 01EZ0010 - 01EZ0011 - 01EZ0012. - Verbund-Nr. 01018604. - Engl. Zsfass. u.d.T.: VICORA initial phase ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  9. Artikel ; Online: Determination of lung segments in computed tomography images using the Euclidean distance to the pulmonary artery.

    Stoecker, Christina / Welter, Stefan / Moltz, Jan H / Lassen, Bianca / Kuhnigk, Jan-Martin / Krass, Stefan / Peitgen, Heinz-Otto

    Medical physics

    2013  Band 40, Heft 9, Seite(n) 91912

    Abstract: Purpose: Computed tomography (CT) imaging is the modality of choice for lung cancer diagnostics. With the increasing number of lung interventions on sublobar level in recent years, determining and visualizing pulmonary segments in CT images and, in ... ...

    Abstract Purpose: Computed tomography (CT) imaging is the modality of choice for lung cancer diagnostics. With the increasing number of lung interventions on sublobar level in recent years, determining and visualizing pulmonary segments in CT images and, in oncological cases, reliable segment-related information about the location of tumors has become increasingly desirable. Computer-assisted identification of lung segments in CT images is subject of this work.
    Methods: The authors present a new interactive approach for the segmentation of lung segments that uses the Euclidean distance of each point in the lung to the segmental branches of the pulmonary artery. The aim is to analyze the potential of the method. Detailed manual pulmonary artery segmentations are used to achieve the best possible segment approximation results. A detailed description of the method and its evaluation on 11 CT scans from clinical routine are given.
    Results: An accuracy of 2-3 mm is measured for the segment boundaries computed by the pulmonary artery-based method. On average, maximum deviations of 8 mm are observed. 135 intersegmental pulmonary veins detected in the 11 test CT scans serve as reference data. Furthermore, a comparison of the presented pulmonary artery-based approach to a similar approach that uses the Euclidean distance to the segmental branches of the bronchial tree is presented. It shows a significantly higher accuracy for the pulmonary artery-based approach in lung regions at least 30 mm distal to the lung hilum.
    Conclusions: A pulmonary artery-based determination of lung segments in CT images is promising. In the tests, the pulmonary artery-based determination has been shown to be superior to the bronchial tree-based determination. The suitability of the segment approximation method for application in the planning of segment resections in clinical practice has already been verified in experimental cases. However, automation of the method accompanied by an evaluation on a larger number of test cases is required before application in the daily clinical routine.
    Mesh-Begriff(e) Algorithms ; Image Processing, Computer-Assisted/methods ; Lung/blood supply ; Lung/diagnostic imaging ; Pulmonary Artery/diagnostic imaging ; Tomography, X-Ray Computed/methods
    Sprache Englisch
    Erscheinungsdatum 2013-09
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 188780-4
    ISSN 2473-4209 ; 0094-2405
    ISSN (online) 2473-4209
    ISSN 0094-2405
    DOI 10.1118/1.4818017
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel: Relationship between pulmonary artery volumes at computed tomography and pulmonary artery pressures in patients with- and without pulmonary hypertension.

    Froelich, Jens J / Koenig, Helmut / Knaak, Lennard / Krass, Stefan / Klose, Klaus J

    European journal of radiology

    2008  Band 67, Heft 3, Seite(n) 466–471

    Abstract: Objectives: This study was designed to determine the relationship between pulmonary artery (PA) volumes at computed tomography (CT) and PA pressures at right-sided heart catheterization in patients with and without pulmonary hypertension (PAH) to ... ...

    Abstract Objectives: This study was designed to determine the relationship between pulmonary artery (PA) volumes at computed tomography (CT) and PA pressures at right-sided heart catheterization in patients with and without pulmonary hypertension (PAH) to develop a noninvasive CT method of PA pressure quantification.
    Materials and methods: Sixteen patients with chronic sleep apnea syndrome underwent contrast enhanced helical CT (slice thickness 3mm; pitch 2; increment 2mm) at inspiration. Eight patients had PAH while cardiopulmonary disease has been excluded in eight other patients. Vascular volumes were determined using a 3D technique (threshold seeded vascular tracing algorithm; thresholds -600 H [lower] and 3,000 H [upper]). Right-sided heart catheterization measurements were available for linear regression analysis of PA volumes and pressures.
    Results: Correlation between PA pressures and volumes (normalized for BMI), was high in both groups (without PAH: r=.85; with PAH .90, Pearson). Compared to elevated PA pressures in patients with pulmonary hypertension (p<.005), PA volumes also were significantly increased (p<.05) among the groups.
    Conclusions: High correlation was found between PA volumes and mean PA pressures in patients with- and without PAH. Significant differences in PA volumes at CT-volumetry may admit non-invasive determination of pulmonary hypertension.
    Mesh-Begriff(e) Adult ; Aged ; Blood Pressure ; Female ; Humans ; Hypertension, Pulmonary/diagnostic imaging ; Hypertension, Pulmonary/physiopathology ; Male ; Middle Aged ; Organ Size ; Pulmonary Artery/diagnostic imaging ; Pulmonary Artery/physiopathology ; Statistics as Topic ; Tomography, X-Ray Computed/methods
    Sprache Englisch
    Erscheinungsdatum 2008-09
    Erscheinungsland Ireland
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 138815-0
    ISSN 1872-7727 ; 0720-048X
    ISSN (online) 1872-7727
    ISSN 0720-048X
    DOI 10.1016/j.ejrad.2007.08.022
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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