Tohoku University

Varian Medical Systems Technologies, Inc.

Hirosaki University

Yoshihiro Takai

Masao Sakai

Noriyasu Homma

Makoto Yoshizawa

Kei Ichiji

Makoto Abe

Marcel R Marc

Norihiro Sugita

John C Ford

Wolfgang Kaissl

Naoki Shibusawa

Xiaoyong Zhang

Haruna Endo

Shogo Yamada

Masatoshi Mitsuya

An image processing device includes: an acquisition unit that acquires a probability distribution of luminance of a pixel in a plurality of perspective images including the luminance of the pixel which is superposition of luminance components resulting from respective objects, based on an occurrence frequency of a perspective image in which the luminance of the pixel has respective values of a plurality of values; a distribution estimation unit that estimates a mixture distribution indicating the acquired probability distribution; a component estimation unit that estimates a component corresponding to a smallest expectation value distribution of which an expectation value is the smallest among a plurality of partial distributions that form the estimated mixture distribution, and forming at least a portion of the luminance of the pixel; a removal unit that removes the estimated component from the luminance of the pixel included in the perspective image.

Image processing device, image processing method, and non-transitory computer-readable recording medium having stored therein image processing program

A signal-processing device, which processes transparent images each expressed by transparent superimposition of a target such as an affected part and a background, includes a transparent image acquiring unit that acquires the transparent images each including the target at a plurality of times; a calculating unit that calculates a component of the transparent image originating from the target and a component of the transparent image originating from the background at a given time t among the plurality of times in association with estimated values of at least one of a distribution originating from the target and a distribution originating from the background and that evaluates consistency with the transparent images; and an updating unit that updates the estimated values of at least one of a distribution originating from the target and a distribution originating from the background at the time t based on the evaluation result.

Signal-processing device and computer-readable recording medium with signal-processing program recorded thereon

A certain component of an input time series signal (hereinafter referred to as input) is assumed as a cycle time-variable time series signal and a prediction model for predicting a value of the input after the predetermined time is produced, and the value of the input after the predetermined time is predicted and outputted using the prediction model.

Signal processing for predicting an input time series signal and application thereof to predict position of an affected area during radiotherapy

An apparatus () for irradiating a target includes a radiation source () for generating a radiation beam and a multiple leaf beam adjuster () for collimating and adjusting the shape of the radiation beam from the radiation source () that would be projected on the target. An image detector () detects generates an image signal of the target. In response to the image signal, a control module () generate a beam adjustment signal for controlling the beam adjuster (), thereby enabling the radiation beam from the radiation source () to track the movement of the target.

Method and apparatus for irradiating a target

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Sendai, Japan

Yoshihiro Takai