International Journal of Molecular Imaging

Research Article

Utility of Quantitative ^99mTc-MAA SPECT/CT for ⁹⁰yttrium-Labelled Microsphere Treatment Planning: Calculating Vascularized Hepatic Volume and Dosimetric Approach

Operator 1 results.


Phantom configuration		True sphere/ background ratio	SPECT alone			SPECT- CT
			Isocontour (%)	Measured volume (cm³)	Error (%)	Isocontour (%)	Measured volume (cm³)	Error Vol. (%)

18,5 MBq/sphere	Cylinder 1	—	2%	6521	−2,90	2%	6521	−2,90
	Sphere 1	2.8	42%	75,45	37,18	48%	57,22	4,04
	Sphere 2	7.6	31%	22,35	6,43	27%	27,08	28,95
	Sphere 3	9.6	27%	18	12,50	29%	16,94	5,88
	Sphere 4	19.6	15%	14,72	84,00	19%	10,91	36,38

37 MBq/sphere	Cylinder 1	—	2%	6180	−7,98	1%	6735	0,28
	Sphere 1	6	46%	44,86	−18,44	42%	49,06	−10,80
	Sphere 2	17	25%	22,58	7,52	29%	20,52	−2,29
	Sphere 3	23.4	23%	17,55	9,69	27%	14,95	−6,56
	Sphere 4	43.8	31%	10,45	30,63	35%	9,08	13,50

55,5 MBq/sphere	Cylinder 1	—	1%	6737	0,31	1%	6737	0,31
	Sphere 1	9.9	44%	45,32	−17,60	31%	59,28	7,78
	Sphere 2	29.6	33%	18,62	−11,33	31%	19,3	−8,10
	Sphere 3	38.6	33%	17,32	8,25	35%	16,17	1,06
	Sphere 4	73.1	31%	14,37	79,63	40%	10,53	31,63

74 MBq/sphere	Cylinder 1	—	NA	NA	NA	NA	NA	NA
	Sphere 1	16	52%	33,72	−38,69	31%	54,86	−0,25
	Sphere 2	45	21%	23,5	11,90	27%	19,81	−5,67
	Sphere 3	57	21%	18,05	12,81	27%	15,49	−3,19
	Sphere 4	114	31%	5,95	−25,63	21%	8,32	4,00

55 MBq	Cylinder 2	—	46%	709	−8,40	25%	795	2,71
116 MBq	Cylinder 2	—	46%	667	−13,82	35%	770	−0,52
72 MBq	Cylinder 3	—	33%	455	−3,81	23%	515	8,88