BioMed Research International

Research Article

Validation of MR-Based Attenuation Correction of a Newly Released Whole-Body Simultaneous PET/MR System

Table 2

Correlations of SUVs from different PET images in major organs and in selected lesions.


SUVs	PET_MR and PET_CT			PET_MR and PET_CTSeg
SUVs	Rho	RD1		Rho	RD2

SUV_mean of main organs
Bone	0.985	−18.8 ± 5.1%	<0.001	0.967	−19.0 ± 8.3%	<0.001	0.893
Liver	0.973	−8.0 ± 3.8%	<0.001	0.949	−3.5 ± 3.6%	<0.001	<0.001
Lung	0.983	−12.2 ± 4.6%	<0.001	0.959	−3.3 ± 6.0%	0.010	<0.001
Lesions within or around bone
SUV_mean	0.947	−18.1 ± 17.4%	<0.001	0.938	−19.3 ± 20.4%	<0.001	0.519
SUV_max	0.997	−13.3 ± 10.5%	<0.001	0.975	−17.9 ± 15.1%	<0.001	0.217
Lesions in soft tissue
SUV_mean	0.981	−8.2 ± 5.8%	<0.001	0.979	−5.5 ± 6.3%	<0.001	<0.001
SUV_max	0.996	−7.3 ± 3.6%	<0.001	0.996	−4.4 ± 4.0%	<0.001	<0.001

Note: SUV, standardized uptake value; max, maximum; PET_MR, MR attenuation correction-based positron emission tomography; PET_CT, PET images from PET/MRI that reconstructed from CT μ-map; PET_CTSeg, PET images from PET/MRI that reconstructed from segmented CT μ-map; Rho, Pearson’s correlation coefficient; RD, relative differences; and were statistical values of RD1 and RD2, respectively; , statistical values of paired t-test between RD1 and RD2.