The Role of CT-Based Attenuation Correction and Collimator Blurring Correction in Striatal Spect Quantification

Table 1

Average recovery (AR) and root mean squared coefficient of variation (RMSCOV) values for unsmoothed reconstructions, (abbreviations: p0, pc, pd: no, constant, and depth dependent correction for collimator blurring resp.).

	Collimator blurring	AR	RMSCOV
CT	p0	31.0	71.3
Based	pc (method 1)	30.8	63.4
Attenuation	pc (method 2)	32.5	63.7
Correction	pd (method 1)	30.3	64.3
	pd (method 2)	32.5	63.4
Uniform	p0	29.9	74.1
Based	pc (method 1)	29.3	67.1
Attenuation	pc (method 2)	31.1	66.6
Correction	pd (method 1)	28.8	68.1
	pd (method 2)	31.1	66.4