Effects of ROI Placement on PET-Based Assessment of Tumor Response to Therapy

Table 2

Patient characteristics.

	Population A	Population B
No. of patients	15	10
Sex (F, M)	3 F, 12 M	1 F, 9 M
Age
Mean age ± SD	58.3 ± 5.7 yr	58.7 ± 11.6 yr
Age range	49–68 yr	42–79 yr
Clinical stage
Stage III	5	1
Stage IV	10	9
Total no. of GTV	38	33
GTVp	15	10
GTVn	23	23
Site
Tongue	5	4
Tonsil	3	3
Hypopharynx	5	1
Larynx	2	1
Paranasal sinus	0	1

F: female, M: male, SD: standard deviation, GTV: gross tumour volume, GTVp: primary tumour, GTVn: involved lymph node.