Differential Diagnosis between Low-Grade and High-Grade Astrocytoma Using System A Amino Acid Transport PET Imaging with C-11-MeAIB: A Comparison Study with C-11-Methionine PET Imaging

Table 1

Patient characteristics.

Total ()
Age (years)
Mean ± SD	44.2 ± 18.5
Median	44
Range	5–71
Male : female	16 : 15
Group A (benign) ()
Age (years)
Mean ± SD	32.2 ± 10.0
Median	33.5
Range	5–46
Male : female	7 : 5
Diagnosis
Astrocytoma grade II or less/low-grade glioma	11
Brain stem glioma	1
Group B (malignant) ()
Age (years)
Mean ± SD	56.7 ± 16.8
Median	60
Range	14–71
Male : female	9 : 10
Diagnosis
Glioblastoma multiforme	7
Glioblastoma multiforme, recurrence	10
Anaplastic astrocytoma, grade 3	2