Systems and methods for cross calibration in dual energy x-ray absorptiometry

An x-ray system, comprising:

• a source configured to emit radiation beam;
• a detector configured to detect the radiation beam and to generate electrical signals in response to the detected radiation;
• and
• a processor communicatively coupled to the detector and configured with instructions in non-transitory memory that when executed cause the processor to:
• acquire, with the detector, a current scan data of a subject and a current scan data of a phantom;
• retrieve a previous scan data of the subject and a previous scan data of a second phantom, each acquired with a different detector in a different system, from a reference space communicatively coupled to the system;
• calculate a correlation factor based on the current scan data of the phantom and the previous scan data of the second phantom;
• and
• calculate a current set of bone mineral quantification values for the subject based on the current scan data of the subject, the current scan data of the phantom, and the correlation factor.

A dual energy x-ray absorptiometry system, comprising:

• a gantry including a radiation source configured to emit radiation and move along a scanning path and a radiation detector configured to move along the scanning path to receive the radiation, the radiation source and radiation detector coupled to opposite ends of the gantry;
• a table disposed between the radiation source and the radiation detector, the table including a scanning area for positioning a subject and a phantom;
• a processor communicatively coupled to the radiation source and the radiation detector and configured with instructions in non-transitory memory that when executed cause the processor to:
• receive a plurality of previous subject scan data and a plurality of corresponding previous calibration data from a reference space controller communicatively coupled to the processor, the plurality of previous subject scan data and the plurality of corresponding previous calibration data obtained by scanning a plurality of subjects with a different dual energy x-ray absorptiometry system;
• obtain a plurality of current subject scan data and a plurality of corresponding current calibration data by scanning the plurality of subjects with the dual energy x-ray system;
• perform regression analysis between the plurality of previous calibration data and the plurality of current calibration data;
• obtain a set of correction factors for the dual energy x-ray system based on the regression analysis;
• and
• establish a baseline in the dual energy x-ray system for the plurality of subjects based on the set of correction factors, the plurality of subjects scanned with the different dual energy x-ray system.