There is provided a biological information monitoring system for monitoring a biological information on a subject on a bed. The system includes a plurality of load detectors which are to be placed in the bed or under legs of the bed, and which are configured to detect a load of the subject; a load separation unit configured to separate a load component which oscillates according to a heartbeat of the subject, from the load of the subject; and a center of gravity position calculation unit configured to obtain a position of a center of gravity of the subject based on the load component which oscillates according to the heartbeat of the subject.

Systems and methods for non-contact monitoring are disclosed herein. An example system includes at least one depth determining device configured to determine depth data representing depth across a field of view; a processor configured to process the depth data to obtain time varying depth or physiological information associated with respiration and/or another physiological function; and a projector configured to project one or more images into the field of view, wherein at least part of the one or more images is based on the obtained time varying depth or physiological information.

A biological detection device includes a signal acquirer that acquires a signal including a respiration component, a filter that attenuates a frequency component other than the respiration component included in the signal and generates a post-processing signal, an analyzer that analyzes the post-processing signal to generate a spectrogram, a variation calculator that calculates variation of energy in a predetermined frequency band in energy of the frequency component indicated by the spectrogram, a first determiner that determines whether the variation is larger than a threshold, a second determiner that, if it is determined by the first determiner that the variation is not larger than the threshold, determines whether a higher harmonic wave with respect to a second peak having energy equal to or more than a predetermined ratio to a first peak where the energy is maximum is present in the predetermined frequency band, and an output unit that outputs a respiration rate based on a frequency of the first peak if it is determined by the second determiner that the higher harmonic wave is absent and outputs a respiration rate based on a fundamental frequency of the higher harmonic wave if it is determined by the second determiner that the higher harmonic wave is present.

A biological detection device includes a signal acquirer that acquires a signal including a respiration component, a filter that attenuates a frequency component other than the respiration component included in the signal and generates a post-processing signal, an analyzer that analyzes the post-processing signal to generate a spectrogram, a variation calculator that calculates variation of energy in a predetermined frequency band in energy of the frequency component indicated by the spectrogram, a first determiner that determines whether the variation is larger than a threshold, a second determiner that, if it is determined by the first determiner that the variation is not larger than the threshold, determines whether a higher harmonic wave with respect to a second peak having energy equal to or more than a predetermined ratio to a first peak where the energy is maximum is present in the predetermined frequency band, and an output unit that outputs a respiration rate based on a frequency of the first peak if it is determined by the second determiner that the higher harmonic wave is absent and outputs a respiration rate based on a fundamental frequency of the higher harmonic wave if it is determined by the second determiner that the higher harmonic wave is present.

An apparatus, system, and method monitors the motion, breathing, heart rate and sleep state of subjects, e.g., humans, in a convenient, non-invasive/non-contact, and low-cost fashion. More particularly, the motion, breathing, and heart rate signals are obtained through processing applied to a raw signal obtained in a non-contact fashion, typically using a radio-frequency sensor. Periods of sleep disturbed respiration, or central apnea can be detected through analysis of the respiratory signal. The mean heart rate, and derived information, such as the presence of cardiac arrhythmias can be determined from the cardiac signal. Motion estimates can be used to recognize disturbed sleep and periodic limb movements. The sleep state may be determined by applying a classifier model to the resulting streams of respiratory, cardiac and motion data. A means for display of the sleep state, respiratory, cardiac, and movement status may also be provided.

An apparatus, system, and method monitors the motion, breathing, heart rate and sleep state of subjects, e.g., humans, in a convenient, non-invasive/non-contact, and low-cost fashion. More particularly, the motion, breathing, and heart rate signals are obtained through processing applied to a raw signal obtained in a non-contact fashion, typically using a radio-frequency sensor. Periods of sleep disturbed respiration, or central apnea can be detected through analysis of the respiratory signal. The mean heart rate, and derived information, such as the presence of cardiac arrhythmias can be determined from the cardiac signal. Motion estimates can be used to recognize disturbed sleep and periodic limb movements. The sleep state may be determined by applying a classifier model to the resulting streams of respiratory, cardiac and motion data. A means for display of the sleep state, respiratory, cardiac, and movement status may also be provided.

Methods and apparatus are provided for planning and delivering radiation treatments by modalities which involve moving a radiation source along a trajectory relative to a subject while delivering radiation to the subject. In some embodiments the radiation source is moved continuously along the trajectory while in some embodiments the radiation source is moved intermittently. Some embodiments involve the optimization of the radiation delivery plan to meet various optimization goals while meeting a number of constraints. For each of a number of control points along a trajectory, a radiation delivery plan may comprise: a set of motion axes parameters, a set of beam shape parameters and a beam intensity.

Methods and apparatus are provided for planning and delivering radiation treatments by modalities which involve moving a radiation source along a trajectory relative to a subject while delivering radiation to the subject. In some embodiments the radiation source is moved continuously along the trajectory while in some embodiments the radiation source is moved intermittently. Some embodiments involve the optimization of the radiation delivery plan to meet various optimization goals while meeting a number of constraints. For each of a number of control points along a trajectory, a radiation delivery plan may comprise: a set of motion axes parameters, a set of beam shape parameters and a beam intensity.

A method and system are disclosed for use in monitoring/screening/diagnosing sleep or wake state of a subject or patient. The method generally includes monitoring the patient's activity during one or more sleep sessions comprising a plurality of intervals known as epochs. The sleep/wake state of the subject is determined during each epoch of the session using actigraphy data obtained during the monitoring session. The actigraphy data provides information about the activity of a patient during an epoch. The sleep or wake state is determined based on a ratio of the activity count during an epoch to the activity count during a preceding epoch. If the ratio is greater than a first activity threshold, then a “wake” indication may be provided by, for example, the system. Alternatively, or additionally, a “wake” indication may be determined if the activity count during the epoch is greater than a threshold.

A method and system are disclosed for use in monitoring/screening/diagnosing sleep or wake state of a subject or patient. The method generally includes monitoring the patient's activity during one or more sleep sessions comprising a plurality of intervals known as epochs. The sleep/wake state of the subject is determined during each epoch of the session using actigraphy data obtained during the monitoring session. The actigraphy data provides information about the activity of a patient during an epoch. The sleep or wake state is determined based on a ratio of the activity count during an epoch to the activity count during a preceding epoch. If the ratio is greater than a first activity threshold, then a “wake” indication may be provided by, for example, the system. Alternatively, or additionally, a “wake” indication may be determined if the activity count during the epoch is greater than a threshold.