Timothy N. Jones

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This paper describes a general-purpose method we have developed for automatically segmenting objects of an unknown number and unknown locations in images. Our method integrates deformable models and statistics of image cues including intensity, gradient, color, and texture. By using a combination of image features rather than a single feature such as(More)
We have developed an algorithm for segmenting objects with simple closed curves, such as the heart and the lungs, that is independent of the imaging modality used (e.g., MRI, CT, echocardiography). Our method is automatic and requires as initialization a single pixel within the boundaries of the object. Existing segmentation techniques either require much(More)
We use a computational uid dynamics CFD solver to sim ulate the ow of blood through the left ventricle LV Boundary condi tions for the solver are derived from actual heart wall motion as measured by MRI SPAMM This novel approach allows for the rst time a patient speci c LV blood ow simulation using exact boundary conditions Introduction The development of a(More)
We have developed an algorithm for segmenting objects with closed, non-intersecting boundaries, such as the heart and the lungs, that is independent of the imaging modality used (e.g., MRI, CT, echocardio-graphy). Our method is automatic and requires as initialization a single pixel/voxel within the boundaries of the object. Existing segmentation techniques(More)
An efficient, transition metal-free procedure for the cyclopropanation of alkenes using malononitrile and the LiI-tBuOCl combination under mild reaction conditions is described. The reaction mechanism most likely involves tBuOI generated in situ from LiI and tBuOCl. The utility of this new methodology has been demonstrated by the synthesis of a potential(More)
The one-pot cyclization of 5-hexynoic acid to produce 3-alkoxy-2-cyclohexenones proceeds in good yields (58-90%). 3-Hexynoic acid was converted to its acyl chloride with the aid of oxalyl chloride and was cyclized to 3-chloro-2-cyclohexenone upon addition of indium(III) chloride. Subsequent addition of alcohol nucleophiles led to the desired(More)
The Virtual Vision Lab (VVL) is a project aimed at producing instructional lab modules for new and emerging techniques in robotic vision. VVL uses an integrated multi-media presentation format that allows the student to learn about robot vision techniques from textual sources, runtime algorithm codes, live and canned digital imagery, interactive modiication(More)
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