Parameters Influencing PET Imaging Features: A Phantom Study with Irregular and Heterogeneous Synthetic Lesions

Table 1

Reconstruction settings.

Reconstruction algorithm		Number of iterations	Number of subsets	FWHM Gaussian filter (mm)	Reconstructed matrix size
Impact of reconstruction algorithm	OSEM3D	3	18	5	256
	OSEM3D + PSF
	OSEM3D + TOF
	OSEM3D + PSF + TOF
Impact of number of iterations	OSEM3D + PSF + TOF	2	18	5	256
		3
		4
Impact of number of subsets	OSEM3D + PSF + TOF	3	18	5	256
			24
Impact of reconstructed matrix size	OSEM3D + PSF + TOF	3	18	5	128
					192
					256
Impact of FWHM of Gaussian filter	OSEM3D + PSF + TOF	3	18	5	192
				7

OSEM = ordered subset expectation maximization; PSF = point spread functions; TOF = time of flight; FWHM = full width at half maximum.