FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1990241680> ?p ?o ?g. }

• W1990241680 abstract "The purpose of the presented work is the automatic localization of the heart from 4D multi-slice magnetic resonance images (MRI). Well known active contour extraction techniques such as 'snakes' or 'balloons' require precise initialization which is mostly done interactively by the user in existing systems. A new method for the automatic initialization of such models is presented here for application on 4D MRI dataset acquired from the human heart. The method consists of two main steps: a global localization of the heart and a coarse initialization of the contours. Furthermore, it is shown how this initialization can be used for an automatic fine segmentation by an active contour model. The temporal analysis of the heart beat cycle is well suited for localization purposes. A 'temporal variance image' is thus first computed at each spatial slice location. These variance images consistently highlight the heart due to its wall movement and the heavy blood flow. By thresholding the variance images, projecting them into a single image, thresholding again and selecting the largest resulting object, a 'binary confidence mask' is computed for the heart region. This mask allow us to extract one binary image of the heart for each spatial slice location, regardless of temporal location. In the initialization stage, an 'initial contour' is matched to each of these masked images by affine transform, adapting size, location, aspect ratio and orientation. Initial contours may be acquired from a predefined model. In absence of such a model, ellipses were successfully applied as generic initial contours. For this stage, 2D contours were used; however, extensions to 3D are straightforward. The affine adapted contours are then considered as initialization for a multi- step active contour model for the accurate extraction of the heart walls: the contours are deformed according to the masked binary images, further refined on the temporal mean images for each spatial slice location, and finally the outer heart walls are tracked over time on the actual images at each spatial slice location. This approach, making use of existing active contour models yields an efficient and robust method for an exact extraction of the heart contours." @default.
• W1990241680 created "2016-06-24" @default.
• W1990241680 creator A5006357609 @default.
• W1990241680 creator A5080094655 @default.
• W1990241680 date "1997-04-25" @default.
• W1990241680 modified "2023-10-01" @default.
• W1990241680 title "<title>Automatic heart localization from a 4D MRI data set</title>" @default.
• W1990241680 cites W142290052 @default.
• W1990241680 cites W1977574189 @default.
• W1990241680 cites W2000220685 @default.
• W1990241680 cites W2086921140 @default.
• W1990241680 cites W2104095591 @default.
• W1990241680 cites W2132032683 @default.
• W1990241680 cites W2132499268 @default.
• W1990241680 cites W2133489969 @default.
• W1990241680 cites W2134434542 @default.
• W1990241680 cites W2152567947 @default.
• W1990241680 cites W2158853513 @default.
• W1990241680 cites W2798501834 @default.
• W1990241680 doi "https://doi.org/10.1117/12.274120" @default.
• W1990241680 hasPublicationYear "1997" @default.
• W1990241680 type Work @default.
• W1990241680 sameAs 1990241680 @default.
• W1990241680 citedByCount "13" @default.
• W1990241680 countsByYear W19902416802012 @default.
• W1990241680 countsByYear W19902416802014 @default.
• W1990241680 countsByYear W19902416802016 @default.
• W1990241680 countsByYear W19902416802021 @default.
• W1990241680 crossrefType "proceedings-article" @default.
• W1990241680 hasAuthorship W1990241680A5006357609 @default.
• W1990241680 hasAuthorship W1990241680A5080094655 @default.
• W1990241680 hasBestOaLocation W19902416802 @default.
• W1990241680 hasConcept C154945302 @default.
• W1990241680 hasConcept C177264268 @default.
• W1990241680 hasConcept C199360897 @default.
• W1990241680 hasConcept C31972630 @default.
• W1990241680 hasConcept C41008148 @default.
• W1990241680 hasConcept C58489278 @default.
• W1990241680 hasConceptScore W1990241680C154945302 @default.
• W1990241680 hasConceptScore W1990241680C177264268 @default.
• W1990241680 hasConceptScore W1990241680C199360897 @default.
• W1990241680 hasConceptScore W1990241680C31972630 @default.
• W1990241680 hasConceptScore W1990241680C41008148 @default.
• W1990241680 hasConceptScore W1990241680C58489278 @default.
• W1990241680 hasLocation W19902416801 @default.
• W1990241680 hasLocation W19902416802 @default.
• W1990241680 hasOpenAccess W1990241680 @default.
• W1990241680 hasPrimaryLocation W19902416801 @default.
• W1990241680 hasRelatedWork W1891287906 @default.
• W1990241680 hasRelatedWork W1969923398 @default.
• W1990241680 hasRelatedWork W2036807459 @default.
• W1990241680 hasRelatedWork W204046101 @default.
• W1990241680 hasRelatedWork W2058170566 @default.
• W1990241680 hasRelatedWork W2229312674 @default.
• W1990241680 hasRelatedWork W258625772 @default.
• W1990241680 hasRelatedWork W2755342338 @default.
• W1990241680 hasRelatedWork W2772917594 @default.
• W1990241680 hasRelatedWork W3116076068 @default.
• W1990241680 isParatext "false" @default.
• W1990241680 isRetracted "false" @default.
• W1990241680 magId "1990241680" @default.
• W1990241680 workType "article" @default.