Patent ID: 11893661
Assignee: RENSSELAER POLYTECHNIC INSTITUTE
Field: nan (nan)
Classification: CPC nan | IPC A  G

Claim 13:
14. A system for reconstructing a polychromatic CT image from a single CT scan using energy-dependent attenuation coefficients, comprising:
a. at least one x-ray tube;
b. at least one detector configured to receive x-rays from the at least one x-ray tube;
c. the single CT scan generated by the at least one detector; and
d. an analysis unit operably coupled to the at least one detector, the analysis unit comprising a computer program configured for implementing a framelet-based iterative algorithm for CT image reconstruction from the single CT scan, the iterative algorithm comprising:
i. a non-negativity step such that negative components are set to zero to force attenuation coefficient positivity;
ii. a soft thresholding step on framelet coefficients to impose image framelet domain sparsity; and
iii. a scaled-gradient descent step to decrease l2-norm error.