Atlas ranking and selection for automatic segmentation of the esophagus from CT scans.

Atlas ranking and selection for automatic segmentation of the esophagus from CT scans. Phys Med Biol. 2017 Oct 19;: Authors: Yang J, Haas B, Fang R, Beadle BB, Garden AS, Liao Z, Zhang L, Balter PA, Court LE Abstract In radiation treatment planning, the esophagus is an important organ-at-risk that should be spared in patients with head and neck cancer or thoracic cancer who undergo intensity-modulated radiation therapy. However, automatic segmentation of the esophagus from CT scans is extremely challenging because of the structure's inconsistent intensity, low contrast against the surrounding tissues, complex and variable shape and location, and random air bubbles. The goal of this study is to develop an online atlas selection approach to choose a subset of optimal atlases for multi-atlas segmentation to delineate esophagus automatically. We performed atlas selection in 2 phases. In the first phase, we used the correlation coefficient of the image content in a cubic region between each atlas and the new image to evaluate their similarity and to rank the atlases in an atlas pool. A subset of atlases based on this ranking was selected, and deformable image registration was performed to generate deformed contours and deformed images in the new image space. In the second phase of atlas selection, we used Kullback-Leibler divergence to measure the similarity of local-intensity histograms between the new image and each of the deformed images, and the measureme...
Source: Physics in Medicine and Biology - Category: Physics Authors: Tags: Phys Med Biol Source Type: research

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AbstractAlaryngeal speech in laryngectomees has revolutionized the patient outlook toward the morbid procedure and the concept of permanent stoma unlike olden era when stigma of stoma with loss of voice was rampant. To analyse acceptance of voice rehabilitation options and their success and management of complications in a tertiary care centre. All patients who underwent laryngectomy from August 2014 to 2018 June at our institution were included in the study. The voice rehabilitation options like oesophageal speech, tracheao-oesophageal puncture and voice prosthesis insertion (TEP), and electrolarynx were explained to the ...
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Source: Asbestos and Mesothelioma News - Category: Environmental Health Authors: Source Type: news
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Source: Asbestos and Mesothelioma News - Category: Environmental Health Authors: Source Type: news
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