EJNMMI Physics

Table 2 Contrast recovery for every reconstruction method and kernel variation using the Bone–lung phantom. Relative deviations (%) in relation to the standard OSEM and for the PSF reconstructions

From: Positron range in combination with point-spread-function correction: an evaluation of different implementations for [124I]-PET imaging

Sphere size	8.5 mm			19.4 mm
Material	Lung	Bone	Bone	Lung	Bone	Bone
Material	(−800 HU)	(500 HU)	(1000 HU)	(−800 HU)	(500 HU)	(1000 HU)
OSEM	0.20	0.18	0.17	0.60	0.59	0.59
OSEM+PRC simplified	0.25 (29.4)	0.18 (1.6)	0.16 (−1.7)	0.77 (29.0)	0.60 (1.7)	0.58 (−1.4)
OSEM+PRC	0.57 (190.5)	0.33 (88.7)	0.36 (114.7)	0.85 (41.9)	0.70 (18.4)	0.68 (15.7)
PSF	0.43	0.38	0.35	0.72	0.74	0.75
PSF+PRC simplified	0.66 (52.8)	0.36 (−5.8)	0.31 (−12.3)	0.94 (30.1)	0.74 (0.4)	0.72 (−3.6)
PSF+PRC	0.79 (83.8)	0.47 (23.0)	0.52 (48.5)	0.94 (30.3)	0.78 (5.2)	0.76 (1.1)

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