Analysis of Breathing Data
AssigneePneumacare Limited
InventorsJoan Lasenby, Willem Hessel De Boer
Life of this patent
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Abstract
A method of analysing breathing data representing a shape of the trunk of a subject 104 as a function of time to monitor and/or analyse the subject's breathing pattern. The data is measured and processed into a data array relating to a 2-dimensional grid having grid points, a position in space of the shape at each grid point and points of time. The method includes the steps of mapping the data array onto a 2-dimensional array, decomposing the 2-dimensional array and forming a signature of the subject 104 from the decomposed 2-dimensional array representing a motion pattern.
Claims29
A method of analysing a data array of at least three dimensions representing a shape of at least part of a body of a subject as a function of time, the data array relating to a 2-dimensional grid having grid points, a position in space of the shape at each grid point and points of time,
- the method including the steps of:
- mapping the data array onto a 2-dimensional array,
- decomposing the 2-dimensional array,
- forming a signature of the subject from the decomposed 2-dimensional array representing a motion pattern of the shape.
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A method of identifying breaths in parameter values representing a breathing pattern over time, including the steps of:
- forming a time average of the parameter values;
- dividing the parameter into segments, each segment lying between subsequent intersections of the parameter and the average;
- determining an extreme value of the parameter within each segment, the extreme value being a start of an exhalation or an end of an exhalation.
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A method of monitoring and/or analysing the breathing and/or lung functions of a subject, the method comprising the steps of:
- projecting a pattern of radiation onto at least part of a body of a subject;
- recording at each of a plurality of instances in time image data representing a three dimensional configuration of at least a portion of the projected pattern at that instance in time;
- processing the image data to produce a data array representing a shape of at least part of the body of the subject as a function of time;
- and
- calculating a value indicative of disorder, preferably an entropy value, for one or more values or parameters of or calculated from the data array.
The method according to claim further comprising the steps of:
- dividing the data array into two or more sub-arrays each representing a three dimensional configuration of a respective part of the projected pattern or of the subject;
- processing the sub-arrays to approximate a volume of each of the parts of the projected pattern or of the subject over time.
Dependencies are inferred from the claim text.