What is CT advances??

* Latest improvement in CT are rapidly incorporated into PET/CT

* The lower cost of SPECT means that “high-end” CT is rarely established in SPECT-CT

* Manufacturers are now able to establish PET/CT with 128 pieces

Multi-slice CT

•Dual slice

–Elscint (1991)

•Four slice

–GE, Philips, Siemens, Toshiba (1998)

•Sixteen slice

–GE, Philips, Siemens, Toshiba (2002)

•32, 40, 64 slice …

–and beyond...

QC for SPECT/CT or PET/CT

*usual checks (noise, CT number correctness)

*Geometrical alignment of SPECT & CT/PET images

*ascertain of correctness of correction -

-head and body sized water phantoms

-Is the CT attenuation correction correct?

* Emission values constant across the phantom?