초록 ▼

A method and system for physiological gating for radiation therapy is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating sy

A method and system for physiological gating for radiation therapy is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating system components. Yet another disclosed aspect of the invention is directed to physiological gating of radiation treatment based upon the phase of the physiological activity.

대표청구항 ▼

A method and system for physiological gating for radiation therapy is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating sy

A method and system for physiological gating for radiation therapy is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating system components. Yet another disclosed aspect of the invention is directed to physiological gating of radiation treatment based upon the phase of the physiological activity. tor. 5. A system for encoding as recited in claim 4, wherein the adder that combines the absolute value signal with the delayed absolute value signal is an `OR` gate. 6. A system for encoding as recited in claim 1, wherein the non-linear processing block generates a non-linear processing indicator; and wherein the lower-layer encoder includes: a multi-dimensional low pass filter that limits the bandwidth of the source image stream; and a multi-dimensional decimator that sub-samples the bandwidth-limited source image stream to form the down-converted image stream; wherein the lower-layer encoder generates a resolution loss indicator by comparing the source image stream to the bandwidth limited source image stream from the multi-dimensional low pass filter; and wherein one of the difference streams is a gated difference stream formed from the difference between the source image stream and non-linear processed image stream based on the non-linear processing indicator and the resolution loss indicator. 7. A system for encoding as recited in claim 1, wherein the non-linear processing block generates a non-linear processing indicator; and wherein the lower-layer encoder includes: a down-converter that receives the source image stream and creates the down-converted image stream; an encoder that forms the lower-layer encoded stream from the down-converted image stream; and a decoder that reconstructs the down-converted image stream from the lower-layer encoded stream; wherein the lower-layer encoder generates a compression loss indicator by comparing the down-converted image stream to the reconstructed down-converted image stream; and wherein one of the difference streams is a gated difference stream formed from the difference between the source image stream and non-linear processed image stream based on the non-linear processing indicator and the compression loss indicator. 8. A system for encoding as recited in claim 1, wherein the upper-layer encoder includes: a decoder for decoding the upper-layer encoded image stream to form a decoded upper-layer encoded image stream; a motion estimation and compensation system that generates motion vectors based on the source stream, the non-linear processed, up-converted image stream and the decoded upper-layer encoded image stream, that generates prediction frames of a certain type from the decoded upper layer encoded image stream, the source image stream, the non-linear processed up-converted image stream and the motion vectors and that generates a mode signal indicating each type of prediction frame; and wherein at least of the difference streams is a motion-compensated difference stream derived from the prediction frames. 9. A system for encoding as recited in claim 1, wherein the upper-layer encoder includes: a decoder for decoding the upper-layer encoded image stream to form a decoded upper-layer encoded image stream; and a subtractor that generates a gated difference image stream between the source image stream and the non-linear processed image stream based on the non-linear processed indicator; a motion estimation and compensation system that generates motion vectors of a particular type from the source image stream, the non-linear processed image stream and the decoded upper-layer encoded image stream, and generates prediction frames from the decoded upper-layer encoded image stream and the motion vectors, wherein a mode signal from the motion compensation system indicates the type of prediction frames; an optimizer that computes the plurality of difference image streams based on some or all of the source image stream, the non-linear processed image stream, the gated difference image stream and the prediction frames and selects one of the difference image streams for encoding; and an encoder that encodes the selected difference image stream to form the upper-layer encoded image stream, the encoder including the mode signal in the upper-layer en