Preliminary X-ray CT investigation to link Hounsfield unit measurements with the International System of Units (SI)

摘要

PurposeThis paper lays the groundwork for linking Hounsfield unit measurements to the International System of Units (SI), ultimately enabling traceable measurements across X-ray CT (XCT) machines. We do this by characterizing a material basis that may be used in XCT reconstruction giving linear combinations of concentrations of chemical elements (in the SI units of mol/m³) which may be observed at each voxel. By implication, linear combinations not in the set are not observable.