Patent ID: 8151022
Filing Date: 2012-04-03
Classification: G06T,H04N

Abstract:
1. A method for data compression and storage in a rotatable part, the rotatable part mounted for rotation within a stationary part and having an interface between the stationary part and the rotatable part, wherein a plurality of sets of projection data are provided by a data acquisition source connected to the rotatable part, wherein each set of projection data corresponds to a view angle of rotation of the rotatable part and includes an array of samples acquired for a corresponding view during a data acquisition period, the method comprising: compressing the samples of each set of projection data to form compressed samples, wherein the compressed samples for each set are arranged in at least one compressed packet, wherein each compressed packet contains the compressed samples of a corresponding portion of the projection data; storing a plurality of the compressed packets for the plurality of sets of projection data in a storage device connected to and rotating with the rotatable part, wherein each of the compressed packets is stored at a corresponding location in the storage device that is accessible based on a packet location parameter during a controllable time period; maintaining an access array containing a plurality of data access parameters corresponding to the plurality of compressed packets, wherein at least one index parameter is associated with the corresponding portion of the projection data for each of the plurality of compressed packets, further comprising: calculating a size of each compressed packet to form a plurality of sizes; and generating the plurality of data access parameters based on the plurality of sizes, wherein the access array associates the data access parameter with the index parameter of the corresponding portion of the projection data; retrieving using a data access parameter from the access array, at least one of the compressed packets from the corresponding location in the storage device in accordance with the packet location parameter in response to a data access command; mapping the compressed packet retrieved from the storage device to at least one data transmission packet, wherein one or more data transmission packets contain the compressed samples of the compressed packet; and transmitting the data transmission packet from a transmitter on the rotatable part to a receiver on the stationary part over a communication channel of the interface.