TABLE 2

Collimators, Radionuclides, and Activities Used, Along with Dead Time

				Dead time
Measurement series	Collimator	Radionuclide	Activity (MBq)	Close detector (10-cm distance)	Distant detector (∼60-cm distance)
A	LEHR	⁶⁸Ga	3.5	21%	4%
	LEHR	^99mTc	9.4	Negligible	Negligible
B	MELP	⁶⁸Ga	10.9	5%	1.5%
	MELP	^99mTc	9.1	Negligible	Negligible
C	HE	⁶⁸Ga	6.6	<1%	Negligible
	HE	^99mTc	8.2	Negligible	Negligible
D	MELP	⁶⁸Ga	7.4	3%	<1%
	MELP	¹¹¹In	9.2	Negligible	Negligible
E	HE	⁶⁸Ga	7.5	<1%	Negligible
	HE	¹¹¹In	9.2	Negligible	Negligible

Activities are given at time halfway into frame 4 for PET radionuclide (⁶⁸Ga) and halfway into frame 5 for SPECT radionuclides (^99mTc or ¹¹¹In).