Radiotracers Used for the Scintigraphic Detection of Infection and Inflammation

Table 1

Physical characteristics of parent radioisotopes.

Parent; isotope	Origin	Reaction from; grandparent	Half-life	Decay reaction to daughter	Mode of decay	Useful energy (keV)	Abundance (%)	Supplied; form
^99mTc	Reactor	^235U(n,f)^99Mo; ^99Mo ^99mTc ()	6.0 hr	^99mTc ^99Tc	Isomeric transition,	140	86	Generator^a
^111In	Cyclotron	^112Cd(p,2n)^111In	2.8 day	^111In () ^111Cd ()	Electron capture,	172, 247	91, 94	Solution
^67Ga	Cyclotron	^68Zn(p,2n)^67Ga	78.3 hr	^67Ga ^67Zn ()	Electron capture,	93, 185, 300, 393	38, 21, 17, 5	Solution
^18F	Cyclotron	^18O(p,n)^18F	109.8 min	^18F ^18O ()	Positron emission	average 249 ()	97	Solution
				^18F ^18O ()	Electron capture,	511	3

Grandparent isotope is localized in the stationary phase of a column, and the parent isotope is isolated by elution with a mobile phase.