Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Mary S. Pastel"'
Publikováno v:
Medical Imaging: Image Processing
Complex-valued weights are used in the first layer of a feed forward neural network to produce a `transform' neural network. This network was applied to a phase-uncertain sine wave detection task against a Gaussian white noise background. When compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79156747d8916a0828424932a0807317
https://doi.org/10.1117/12.348623
https://doi.org/10.1117/12.348623
Publikováno v:
Medical Imaging: Image Processing
Neural networks are applied to a Rayleigh discrimination task for simulated limited-view computed tomography with maximum-entropy reconstruction. Network performance is compared to that obtained using the best machine approximation to the ideal obser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4a9167042c3cd0c5fe8ea891b7023aa
https://doi.org/10.1117/12.310912
https://doi.org/10.1117/12.310912
Publikováno v:
SPIE Proceedings.
Neural networks were applied to the task of detecting simulated low contrast lesions in limited-view reconstruction tomography images. Results were compared with those for theoretically derived machine observers and for human observers. Preliminary r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4b6c5152e09a1d7627a115eb644800f
https://doi.org/10.1117/12.175096
https://doi.org/10.1117/12.175096
Publikováno v:
SPIE Proceedings.
In many areas of practical interest, for example medical decision making problems, input data for training and testing neural networks are severely limited in number, are corrupted by noise, and may be highly correlated. In this study we examine thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b14b350bced48b9f61d63faa4a9d8c96
https://doi.org/10.1117/12.175100
https://doi.org/10.1117/12.175100
Publikováno v:
SPIE Proceedings.
Neural network based analysis of ultrasound image data was carried out on liver scans of normal subjects and those diagnosed with diffuse liver disease. In a previous study, ultrasound images from a group of normal volunteers, Gaucher's disease patie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da7d40026f1df16da5ed7e8345fef1cd
https://doi.org/10.1117/12.154550
https://doi.org/10.1117/12.154550
Publikováno v:
Medical Imaging V: Image Capture, Formatting, and Display.
Compression methods based on Gabor functions are implemented for simulated nuclear medicine liver images with and without simulated lesions. The quality of the compression schemes are assessed objectively by comparing the original images to the compr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86b452a8b8c0fd04ab55c4e9ffb32591
https://doi.org/10.1117/12.45195
https://doi.org/10.1117/12.45195
Publikováno v:
Journal of Computer Assisted Tomography. 2:156-161
Although computed tomography (CT) delineation of normal white matter of the cerebral hemispheres has been well documented, there has been no description of white matter within the cerebellum. Through the use of phantom studies, CT number correlations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::233122e95d64a6cd3b7d21682522bb1e
https://doi.org/10.1097/00004728-197804000-00005
https://doi.org/10.1097/00004728-197804000-00005
Autor:
Mary S. Pastel, Kenneth R. Maravilla
Publikováno v:
Computerized tomography. 2(3)
The advent of computed tomography (CT) has initiated a technological revolution which continues to the present time. A brief review of basic principles of CT scanning is presented, and the evolution of modern CT scanner systems is traced. Some early
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a43961f2f2ae353e072ecc9f6cae9c19
https://pubmed.ncbi.nlm.nih.gov/710085
https://pubmed.ncbi.nlm.nih.gov/710085
Publikováno v:
Medical physics. 6(2)
The imaging process has two fundamental stages: detection and display. The detection stage can be quantified rigourously using Shannon's information theory. This requires the contrast scale (CS), modulation transfer function (MTF), and noise power sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac093f2b1198189c527c4c8ad24606e4
https://pubmed.ncbi.nlm.nih.gov/460068
https://pubmed.ncbi.nlm.nih.gov/460068
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