Task-based optimization of dedicated breast CT via Hotelling observer metrics
نویسندگان
چکیده
منابع مشابه
Dedicated breast CT: initial clinical experience.
PURPOSE To prospectively and intraindividually compare dedicated breast computed tomographic (CT) images with screen-film mammograms. MATERIALS AND METHODS All patient studies were performed according to protocols approved by the institutional review board and Radiation Use Committee; informed consent was obtained. A breast CT scanner prototype was used to individually scan uncompressed breas...
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Medical-imaging systems are designed to aid medical specialists in a specific task. In order to satisfy the quality preferences of a human observer, the optimization of medicalimaging systems has to include measurements of human performance and has to use these results for final tuning of the physical parameters of the system. To measure human performance it is necessary to conduct the psychoph...
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Purpose: The purpose of the current work was experimental investigations of the mean breast dose and volume dose distributions with and without adaptive filtration. Adaptive filtration of the x-ray beam is used in dedicated breast CT to reduce dynamic range requirements on the detector, and to improve image quality. The adaptive filter has a predetermined shape, it is placed after the x-ray sou...
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The inclusion of internal noise in model observers is a common method to allow for quantitative comparisons between human and model observer performance in visual detection tasks. In this article, we studied two different strategies for inserting internal noise into Hotelling model observers. In the first strategy, internal noise was added to the output of individual channels: (a) Independent n...
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What type of regularization method is optimal for penalized-likelihood image reconstruction when the imaging task is signal detection based on a channelized Hotelling (CHO) observer? To answer such questions, one would like to have a simple analytical expression (even if approximate) for the performance (SNR) of the CHO observer given different reconstruction methods. Bonetto, Qi, and Leahy (IE...
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ژورنال
عنوان ژورنال: Medical Physics
سال: 2014
ISSN: 0094-2405
DOI: 10.1118/1.4896099