Methods for physiological state determination in body scans
A system for measuring muscle mass of a patient has a dual-energy radiation emission source. A radiation detector is configured to detect radiation emitted from the dual-energy radiation emission source passed through the patient. A processor has a memory with storing instructions, that when executed by the processor, perform a set of operations. The operations include receiving radiation detection data; generating a scan representation; identifying a primary fat target; determining an amount of fat in the primary fat target; comparing the amount of fat in the primary fat target to a reference; and based on the comparison, correcting an estimated amount of lean tissue to generate a corrected muscle mass value.
1. A method for identifying a condition in a patient, the method comprising:
detecting, by a detector, a beam of radiation having passed through the patient;
based on the detected beam of radiation, generating a scan representation including one or more pixels;
identifying, by a processor, a primary fat target in the scan representation;
analyzing, by the processor, at least one pixel within the scan representation to determine a sum of an amount of fat and an amount of water in the primary fat target;
comparing, by the processor, the determined sum to a reference amount;
based on the comparison, generating, by the processor, a condition indicator; and
displaying the condition indicator on a user interface.
2. The method of claim 1 , wherein the condition indicator corresponds to a localized edema in a region of interest of the patient.
3. The method of claim 2 , wherein the condition indicator is displayed on a user interface operatively coupled to a densitometer.
4. The method of claim 1 , wherein the region of interest is an appendage.
5. The method of claim 1 , wherein the reference amount is determined from a set of sample persons.
6. The method of claim 1 , wherein the primary fat target is a subcutaneous fat region.
7. A method for identifying a condition in a subject, the method comprising:
irradiating the subject with a radiation from a radiation source;
detecting, by a radiation detector, a subject radiation from the subject in response to the irradiation;
generating a representation of a region of interest of the subject based on the detected radiation;
identifying, by a processor, a target tissue within the representation;
identifying, by the processor, a subregion in the representation as representative of the target tissue;
analyzing, by the processor, the subregion to determine a sum of an amount of fat and an amount of water in the target tissue;
comparing, by the processor, the determined sum of fat and water to a reference amount;
generating, by the processor, a condition indicator based on the comparison; and
displaying the condition indicator on a user interface.
8. The method of claim 7 , wherein detecting a radiation from the subject comprises detecting the radiation from the radiation source and passed through the subject.
9. The method of claim 7 , wherein:
irradiating the subject with a radiation from a radiation source comprises irradiating the subject with a scanned radiation;
generating a representation of a region of interest comprises generating a scan representation, having one or more pixels, of the region of interest;
identifying a subregion comprises identifying, by the processor, a pixel in the scan representation representative of the target tissue; and
analyzing the target tissue comprises analyzing the pixel to determine the sum of fat and water in the target tissue.
10. The method of claim 7 , wherein identifying a target tissue comprises identifying a primary fat target.
11. The method of claim 10 , wherein identifying a target tissue comprises identifying a portion of the body that is predominately not occupied by muscle.
12. The method of claim 7 , wherein generating a condition indicator comprises generating, by the processor, an indicator corresponding to localized edema.
13. The method of claim 7 , wherein displaying the condition indicator comprises displaying the condition indicator on a user interface operatively coupled to a densitometer.
14. The method of claim 7 , wherein the reference amount comprises an amount of fat and an amount of water determined from a set of sample subjects.
15. An apparatus, comprising:
one or more radiation sources configured to irradiate a subject with a radiation;
one or more radiation detectors configured to detect a subject radiation from the subject in response to the irradiation;
one or more processors; and
a memory coupled to the one or more processors and storing instructions that, when executed by the one or more processors, carry out a process comprising:
receive radiation detection data from the one or more radiation detectors;
generating a representation of a region of interest of the subject based on the radiation detection data;
identifying a target tissue within the representation;
identifying a subregion in the representation as representative of the target tissue;
analyzing the subregion to determine a sum of an amount of fat and an amount of water in the target tissue;
comparing the determined sum of fat and water to a reference amount; and
generating a condition indicator based on the comparison.
16. The apparatus of claim 15 , wherein identifying a target tissue comprises identifying a primary fat target.
17. The apparatus of claim 16 , where identifying a primary fat target comprises identifying a subcutaneous fat region.
18. The apparatus of claim 15 , wherein generating a condition indicator comprises generating an indicator corresponding to localized edema.
19. The apparatus of claim 15 , wherein:
the radiation source comprises a scanning radiation source;
generating a representation of a region of interest comprises generating a scan representation, having one or more pixels, of the region of interest;
identifying a subregion comprises identifying a pixel in the scan representation representative of the target tissue; and
analyzing the target tissue comprises analyzing the pixel to determine the sum of fat and water in the target tissue.
20. The apparatus of claim 15 , wherein the reference amount comprises an amount of fat and an amount of water determined from a set of sample subjects.