The Crosstalk Removal tool is used to remove crosstalk photons in dual-isotope SPECT images. The limits in energy resolution inherent to SPECT imaging result in some overlap between the energy spectra of isotopes with relatively similar peak energies. For example, in dual-isotope
Tc-99m imaging, some
I-123 photons will spill over into the
Tc-99m window and vice versa. The Crosstalk Removal tool is applied to projection data to remove these “spill over” photons or crosstalk.
The Crosstalk Removal tool is accessible by going to Advanced Modules>NucMed>NanoSPECT.
The Crosstalk Removal tool requires users to enter the scaling factor of both the Input and Reference images, as well as the Full-Width Half-Maximum (FWHM) of the smoothing kernel in order to remove crosstalk photons.