Table 1.

Time-course of intraoperatively recorded countrates for individual patients: each data point represents the average of three single measurements

	Sex	Age	Localisation	Operation	Normal bone	Countrate PGS (AU)
						Tumour ("hot spot”)	Resected tumour	Tumour site after resection	Reduction after resection (%)
1	F	22	th 2	Intralesional resection	50	480	a	100	79
2	M	16	c 5	Intralesional resection	60	263	a	73	72
3	F	31	th 12	Excision pedicle	85	350	270	100	71
4	M	22	l 2	Excision pedicle	100	180	40	110	38
5	M	18	th 10	Part. laminectomy	70	460	200	70	84
6	M	30	s 4	Intralesional resection	80	290	190	90	69
7	m	23	l 1	Intralesional resection, post. instr. Th12 - L2	70	180	280	140	22

^aMultiple bone chips resected, for methodological reasons integral countrates cannot be assessed reliably