Table 3. MTVs of skeletal lesions with the SUV threshold of 2.0 measured in PET using 11C-acetate and 18F-FDG.

Data are presented as mean ± SD and range unless otherwise specified.

FDG, fluorodeoxyglucose; MTV, metabolic tumor volume; SUV, standardized uptake value

Lesion location	11C-acetate (mL)	18F-FDG (mL)	p-value
Cervical	4.66 ± 4.62 (0.10-13.1)	0 ± 0	0.016
Thoracic	89.62 ± 51.61 (11.1-160)	0.42 ± 0.73 (0-2.16)	0.016
Lumbar	81.78 ± 48.41 (2.26-137)	10.6 ± 24.1 (0-69.4)	0.016
Cranial	0.74 ± 1.22 (0-3.40)	0 ± 0	0.181
Humerus	1.37 ± 3.07 (0-8.88)	0 ± 0	0.371
Forearm	0.12 ± 0.26 (0-0.76)	0 ± 0	0.371
Scapula	0.4 ± 0.68 (0-1.90)	0 ± 0	0.181
Clavicle	1.63 ± 2.62 (0-6.85)	0.14 ± 0.35 (0-1.00)	0.181
Ribs	3 ± 3.31 (0-9.35)	0 ± 0	0.1
Sternum	6.66 ± 10.1 (0-29.8)	0.07 ± 0.17 (0-0.50)	0.059
Pelvis	120 ± 135 (8.97-424)	0.82 ± 1.99 (0-5.69)	0.016
Femur	6.13 ± 7.82(0-23.9)	0.05 ± 0.12 (0-0.33)	0.1
Total	316 ± 221 (65.0-728)	12.1 ± 23.7	0.016