Nero has cancer.
Emission computed tomography -LRB- ECT -RRB- is a type of tomography involving radioactive emissions .. tomography. tomography. radioactive. radioactive. Types include positron emission tomography -LRB- PET -RRB- and Single-photon emission computed tomography -LRB- SPECT -RRB- .. tomography. tomography. positron emission tomography. positron emission tomography. Single-photon emission computed tomography. Single-photon emission computed tomography. positron. positron. The imaging agent used in SPECT emits gamma rays , as opposed to the positron emitters -LRB- such as 18F -RRB- used in PET .. gamma rays. gamma rays. positron. positron. There are a range of radiotracers -LRB- such as 99mTc , 111In , 123I , 201Tl -RRB- that can be used , depending on the specific application .. Category  : Tomography. Category  :3 d nuclear medical imaging