Lung function analysis method and apparatus
First Claim
1. A computer-implemented method for assessing a subject'"'"'s lung, the method comprising:
- receiving, at a processor, first data which has been obtained from the subject by performing Oxygen-Enhanced Magnetic Resonance Imaging (OE-MRI);
determining, from the first data, a first time-varying input of a partial pressure of oxygen measured in tissue water;
determining, from the first data, a second time varying input of a partial pressure of oxygen content in inhaled gases;
determining, from the first data, a third time varying input of oxygen content in venous blood;
generating, by the processor, an output by fitting a model of lung function to said first time varying input, said second time varying input, and said third time varying input,wherein the model of lung function comprises a first model component and a second model component, the first model component having a first input corresponding to said first time varying input of a partial pressure of oxygen measured in tissue water and a second input corresponding to said second time varying input of oxygen content in inhaled gases and modelling a transfer of gaseous oxygen from a gaseous space within the lung to a biological material within the lung, the second model component having an input corresponding to said third time varying input of oxygen content in venous blood and modelling a transfer of oxygen from the lungs by an oxygenation of the venous blood to create oxygenated blood; and
determining a measure of ventilation and perfusion within the subject'"'"'s lung based upon said generated output.
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Abstract
A method for generating data indicative of lung function of a subject. The method comprises receiving first data which has been obtained from the subject, and inputting said first data to a model of lung function to generate said data indicative of lung function. The model of lung function comprises a first model component modelling transfer of gaseous oxygen from a gaseous space within the lung to biological material within the lung based upon quantitative data indicative of oxygen content in the inhaled gases and oxygen content in the biological material and a second model component modelling the transfer of oxygen from the lungs by oxygenation of venous blood to create oxygenated blood based upon quantitative data indicative of oxygen content in the venous blood.
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Citations
34 Claims
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1. A computer-implemented method for assessing a subject'"'"'s lung, the method comprising:
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receiving, at a processor, first data which has been obtained from the subject by performing Oxygen-Enhanced Magnetic Resonance Imaging (OE-MRI); determining, from the first data, a first time-varying input of a partial pressure of oxygen measured in tissue water; determining, from the first data, a second time varying input of a partial pressure of oxygen content in inhaled gases; determining, from the first data, a third time varying input of oxygen content in venous blood; generating, by the processor, an output by fitting a model of lung function to said first time varying input, said second time varying input, and said third time varying input, wherein the model of lung function comprises a first model component and a second model component, the first model component having a first input corresponding to said first time varying input of a partial pressure of oxygen measured in tissue water and a second input corresponding to said second time varying input of oxygen content in inhaled gases and modelling a transfer of gaseous oxygen from a gaseous space within the lung to a biological material within the lung, the second model component having an input corresponding to said third time varying input of oxygen content in venous blood and modelling a transfer of oxygen from the lungs by an oxygenation of the venous blood to create oxygenated blood; and determining a measure of ventilation and perfusion within the subject'"'"'s lung based upon said generated output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A computer-implemented method for assessing a subject'"'"'s lung, the method comprising:
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receiving, by a processor, first data obtained from the subject; determining, from the first data, a first time varying input of a partial pressure of oxygen measured in tissue water; determining, from the first data, a second time varying input of a partial pressure of oxygen content in inhaled gases; determining, from the first data, a third time varying input of oxygen content in venous blood; generating, by the processor, an output by fitting a model of lung function to said first time-varying input, said second time-varying input, and said third time varying input, wherein the model of lung function comprises a first model component and a second model component, the first model component having a first input corresponding to said first time varying input of a partial pressure of oxygen measured in tissue water and a second input corresponding to said second time varying input of oxygen content in inhaled gases and modelling a transfer of gaseous oxygen from a gaseous space within the lung to a biological material within the lung, the second model component having an input corresponding to said third time varying input of oxygen content in venous blood and modelling a transfer of oxygen from the lungs by an oxygenation of the venous blood to create oxygenated blood; determining a first measure of ventilation and perfusion within the subject'"'"'s lungs while the subject inhales gases comprising a first concentration of oxygen based upon said generated output; obtaining, by the processor, a second measure of ventilation within the subject'"'"'s lung and perfusion within the subject'"'"'s lung while the subject inhales gases comprising a second concentration of oxygen; generating, by the processor, second data based upon the first measure and the second measure; determining, by the processor, a quantitative measure of ventilation within the subject'"'"'s lung and perfusion within the subject'"'"'s lung based upon the second data. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A computer program adapted to implement a method for assessing a subject'"'"'s lung, the computer program carried by a computer readable medium, the computer program comprising:
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computer readable instructions arranged to cause a computer to receive first data obtained from the subject; determine, from the first data, a first time varying input of a partial pressure of oxygen measured in tissue water; determine, from the first data, a second time varying input of a partial pressure of oxygen content in inhaled gases; determine, from the first data, a third time varying input of oxygen content in venous blood; generate an output by fitting a model of lung function to said first time varying input, said second time varying input, and second third time varying input, wherein the model of lung function comprises a first model component and a second model component, the first model component having a first input corresponding to said first time varying input of a partial pressure of oxygen measured in tissue water and a second input corresponding to said second time varying input of oxygen content in inhaled gases and modelling a transfer of a gaseous oxygen from a gaseous space within the lung to a biological material within the lung, the second model component having an input corresponding to third time varying input of oxygen content in venous blood and modelling a transfer of oxygen from the lungs by an oxygenation of the venous blood to create an oxygenated blood; and determining a measure of ventilation and perfusion within the subject'"'"'s lung based upon said generated output.
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34. An apparatus for assessing a subject'"'"'s lung, the apparatus comprising:
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a memory storing processor readable instructions; and a processor arranged to read and execute instructions stored in said program memory; wherein said processor readable instructions comprise instructions arranged to cause the processor to receive first data obtained from the subject; determine, from the first data, a first time varying input of a partial pressure of oxygen measured in tissue water; determine, from the first data, a second time varying input of a partial pressure of oxygen content in inhaled gases; determine, from the first data, a third time varying input of oxygen content in venous blood; generate an output by fitting a model of lung function to said first time varying input, said second time varying input, and said third time varying input, wherein the model of lung function comprises a first model component and a second model component, the first model component having a first input corresponding to said first time varying input of a partial pressure of oxygen measured in tissue water and a second input corresponding to said second time varying input of oxygen content in inhaled gases and modelling a transfer of a gaseous oxygen from a gaseous space within the lung to a biological material within the lung, the second model component having an input corresponding to said third time varying input of oxygen content in venous blood and modelling a transfer of oxygen from the lungs by an oxygenation of the venous blood to create an oxygenated blood; and determining a measure of ventilation and perfusion within the subject'"'"'s lung based upon said generated output.
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Specification