It also provides a precisely registered CT image , which can provide additional anatomical information .
As X-ray CT images are an attenuation map of the tissues , this data can be incorporated into the SPECT reconstruction to correct for attenuation .
SPECT also provides a precisely registered CT image , which can provide additional anatomical information .
As X-ray CT images are an attenuation map of the tissues , this data can be incorporated into the SPECT reconstruction to correct for attenuation .