Automated and robust organ segmentation for 3D-based internal dose calculation

EJNMMI Research

Table 3 Calculated left and right kidney masses (g) based on AI (labelled with “AI”) and experts (labelled with “Ex”) segmentation on dataset 4

Mass/Patient	1	2	3	4	5	6	7	8	Avg.
L Kid Ex(g)	148	102	254	147	99	142	107	184
R Kid Ex(g)	148	166	*	160	122	127	90	178
L Kid AI(g)	169	93	243	125	95	138	102	188
R Kid AI(g)	166	184	*	137	124	104	90	170
L Kid Di(%)	14	(-) 9	(-) 4	(-)15	(-) 4	(-) 3	(-) 5	2
R Kid Di(%)	12	11	*	(-)14	2	(-)18	0	(-) 4
Mean Di(%)	13	10	4	14.5	3	10.5	2.5	3	7.5

The relative differences (labelled with “Di”), for left, right and average are shown in the last 3 rows. The segmentation is done on the contrast-enhanced CT taken prior to the radiopharmaceutical administration
(-) and * represent mass underestimation by the AI and lack of organ in the patient, respectively