Table 2.

Necrotic zone boundary estimates in micrometres for the nine tumour spheroids. The italicized PCF estimates are for fitted PCFs (and therefore critical points) that reside within the 97.5 and 2.5 percentiles of 1000 CSR point patterns (e.g. see first row of results for spheroid in figure 5).

		group I			group II			group III
human		—	—	—	36	36	34	81	83	93
		—	—	—	43	40	53	138	90	128
non-periodic PCF		12	6	23	42	46	34	94	92	96
		15	6	30	46	47	46	140	94	132
periodic PCF		—	—	52	42	49	30	94	101	95
		—	—	69	46	50	42	139	104	131
DBSCAN		84	—	—	43	47	33	77	74	80
		103	—	—	47	48	45	114	77	110