Single photon emission computerized tomography (procedure)

• FSN: Single photon emission computed tomography of X (procedure)
• PT: Single photon emission computed tomography of X
• SYN: SPECT of X

For example, 

• • 
    • FSN:  Single photon emission computed tomography of heart (procedure)
    • PT:  Single photon emission computed tomography of heart
    • SYN:  SPECT of heart