Balancing Image Quality and Iodine Intake: Insights from CT Spectral Imaging of the Portal Vein

26 March 2025 : Clinical Research

Linjie Huang^{ABCDEF 1}, Shengchen Jiang^{CD 1}, Fengqiu Ruan^{C 2}, Liling Long

^{EG 1*}

DOI: 10.12659/MSM.947391

Med Sci Monit 2025; 31:e947391

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Table 5 Comparison of objective scores of 40–140 keV image quality in Group C.

	Extra-hepatic portal vein				Intra-hepatic portal vein
	CT values	Image noise	CNR	SNR	CT values	Image noise	CNR	SNR
40 keV	407±63.52	41.16±6.10	9.44±2.25	10.04±1.95	394.91±63.94	44.01±7.95	4.68±1.37	8.68±1.86^*
50 keV	281.13±41.34	29.63±4.25	8.41±2.01	9.63±1.77	273.97±43.89	31.36±5.30	4.04±1.28	8.84±1.33
60 keV	203.56±28.26	22.49±3.15	7.27±1.77	9.18±1.62	200.18±28.86	23.42±3.67	3.40±1.20	8.64±1.23
70 keV	155.82±19.77	18.13±2.48	6.12±1.53	8.71±1.45	154.92±19.74	18.63±2.70	2.83±0.97	8.42±1.20
80 keV	125.03±14.87	15.32±2.06	5.11±1.34	8.27±1.32	125.38±14.53	15.55±2.13	2.23±0.88	8.16±1.17
90 keV	104.88±11.75	13.54±1.77	4.11±1.15	7.85±1.22	105.99±11.36	13.54±1.78	1.71±0.78	7.93±1.15
100 keV	90.68±10.07	12.24±1.58	3.32±1.05	7.51±1.15	92.44±9.38	12.15±1.56	1.25±0.72	7.71±1.14
110 keV	80.43±8.98	11.35±1.45	2.60±0.97	7.18±1.09	82.82±8.19	11.19±1.43	0.86±0.69	7.51±1.14
120 keV	73.48±8.32	10.72±1.36	2.04±0.92	6.94±1.06	75.95±7.38	10.50±1.35	0.53±0.71	7.34±1.12
130 keV	68.25±8.00	10.27±1.29	1.62±0.91	6.73±1.04	70.95±7.14	9.99±1.29	0.29±0.67	7.22±1.15
140 keV	63.99±7.78	9.87±1.24	1.23±0.91	6.56±1.03	66.87±6.91	9.57±1.26	0.08±0.67	7.10±1.17
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Except where indicated, data are presented as means±standard deviations (SD). ^* Data are expressed as median±interquartile range. p

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