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Table 3 Mean difference between methods for determining lesion activity concentration (kBq/mL), MTV (mL), and TTU (kBq)

From: Quantitative evaluation of PSMA PET imaging using a realistic anthropomorphic phantom and shell-less radioactive epoxy lesions

Metric

Method

OSEM (24 subsets)

OSEM (32 subsets)

BSREM (32 subsets)

Concentration

Max versus Peak

29.19, p = 0.0156

33.76, p = 0.0129

23.22, p = 0.0232

Concentration

Max versus Apex

20.29, p = 0.0167

23.72, p = 0.0132

15.38, p = 0.0256

Concentration

Peak versus Apex

-8.90, p = 0.0135

-10.04, p = 0.0125

-7.84, p = 0.0202

Concentration

Threshold versus Gradient

1.71, p = 0.418

4.19, p = 0.227

0.55, p = 0.804

MTV

Threshold versus Gradient

0.646, p = 0.0400

0.394, p = 0.0829

1.576, p = 0.0362

TTU

Threshold versus Gradient

5.47 p = 0.0144

3.62 p = 0.0450

9.46 p = 0.0176

  1. P-value from a paired t test is shown (bolded values indicate significance below α = 0.05)