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 3 Comparison of objective scores of 40–140 keV image quality in Group A.

	Extra-hepatic portal vein				Intra-hepatic portal vein
	CT values	Image noise	CNR	SNR	CT values	Image noise	CNR	SNR
40 keV	367.14±53.10	41.07±5.24	8.51±1.60	9.05±1.47	349.24±58.70	41.39±6.73	3.77±1.11	8.52±1.26
50 keV	254.37±35.49	29.59±3.79	7.65±1.42	8.71±1.42	244.38±38.35	29.62±4.59	3.30±0.88	8.33±1.17
60 keV	185.51±25.19	22.59±2.84	6.53±1.29	8.32±1.36	181.07±27.13	22.55±3.33	2.85±0.80	8.11±1.15
70 keV	141.77±20.51	18.29±2.30	5.40±1.25	7.87±1.44	141.16±20.09	18.03±2.58	2.35±0.69	7.91±1.12
80 keV	115.35±14.88	15.61±1.93	4.48±1.05	7.74±1.99^*	115.67±15.88	15.20±2.16	1.89±0.65	7.70±1.11
90 keV	97.29±12.53	13.81±1.72	3.61±0.99	7.15±1.22	98.74±12.73	13.38±1.85	1.49±0.58	7.47±1.11
100 keV	84.67±11.02	12.57±1.56	2.84±0.94	6.84±1.19	86.84±10.87	12.11±1.65	1.12±0.58	7.26±1.12
110 keV	75.67±10.08	11.68±1.44	2.26±0.95	6.58±1.17	78.56±9.62	11.20±1.54	0.82±0.59	7.11±1.13
120 keV	69.53±9.44	11.03±1.38	1.70±0.93	6.40±1.16	72.80±8.73	10.60±1.46	0.57±0.61	6.97±1.14
130 keV	64.64±9.02	10.46±1.23	1.27±0.93	6.26±1.11	68.23±8.10	10.13±1.40	0.37±0.64	6.84±1.15
140 keV	60.87±8.72	10.22±1.27	0.91±0.94	6.05±1.15	64.67±7.62	9.76±1.36	0.21±0.67	6.73±1.16
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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