Amazon Technologies, Inc.

The Brigham and Women's Hospital, Inc.

Benjamin M Schwartz

Nathan J McDannold

A system and method for tracking the position of a region in a subject using an ultrasound system is provided. Training data that indicates the position of the region is acquired from the subject while ultrasound data is acquired from the subject using the ultrasound system. A position mapping table is formed using the training data and ultrasound data; this table relates position information contained in the training data to the acquired ultrasound data. The position of the region is tracked by acquiring additional ultrasound data from the subject using the ultrasound system. This additional ultrasound data is compared to the ultrasound data contained in the position mapping table to identify the position of the region based on a unique relationship between the position of the region and ultrasound echo signatures of the ultrasound data acquired in both the training and motion tracking stages.

System and method for motion tracking using unique ultrasound echo signatures

In organizing video data, an analysis can be performed to determine whether the video data meets specifications for organization on storage media. Potential breaks in the video data may be identified for organizing the video data on discrete physical portions of the storage media. A buffer space may be calculated based on an identified potential break for spacing the video data around the potential break to meet the data organization specifications.

Video data organization

A disc encoding system encodes a plurality of optical discs with identical data on a first portion and variable data on a second portion of each of the plurality of optical discs. A hybrid disc can include a first and a second portion. The hybrid disc enables encoding the identical data on the first portion using a disc pressing process in which a master disc is used to define a pressing pattern. The variable data can be written on the second portion using a disc burning process in which at least one laser is used to modify a reflective property of the hybrid optical disc material, such that at least some of the optical discs vary in content. In an embodiment, the identical data includes one of movies, games, software, or music and the variable data includes one of digital fingerprints, logo data, or advertisement content. The disc encoding system can use location identifiers to identify location in the second portion of the hybrid optical disc for burning varying data.

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Seattle, WA, United States of America

Benjamin M Schwartz