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- Title
Feasibility of low-concentration iodinated contrast medium with lower-tube-voltage dual-source CT aortography using iterative reconstruction: comparison with automatic exposure control CT aortography.
- Authors
Shin, Hee; Kim, Song; Lee, Jae-Hwan; Park, Jae-Hyeong; Jeong, Jin-Ok; Jin, Seon; Shin, Byung; Shin, Kyung-Sook; Ahn, Moonsang; Shin, Hee Jeong; Kim, Song Soo; Jin, Seon Ah; Shin, Byung Seok
- Abstract
To evaluate the feasibility of low-concentration contrast medium (CM) for vascular enhancement, image quality, and radiation dose on computed tomography aortography (CTA) using a combined low-tube-voltage and iterative reconstruction (IR) technique. Ninety subjects underwent dual-source CT (DSCT) operating in dual-source, high-pitch mode. DSCT scans were performed using both high-concentration CM (Group A, n = 50; Iomeprol 400) and low-concentration CM (Group B, n = 40; Iodixanol 270). Group A was scanned using a reference tube potential of 120 kVp and 120 reference mAs under automatic exposure control with IR. Group B was scanned using low-tube-voltage (80 or 100 kVp if body mass index ≥25 kg/m(2)) at a fixed current of 150 mAs, along with IR. Images of the two groups were compared regarding attenuation, image noise, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), iodine load, and radiation dose in various locations of the CTA. In comparison between Group A and Group B, the average mean attenuation (454.73 ± 86.66 vs. 515.96 ± 101.55 HU), SNR (25.28 ± 4.34 vs. 31.29 ± 4.58), and CNR (21.83 ± 4.20 vs. 27.55 ± 4.81) on CTA in Group B showed significantly greater values and significantly lower image noise values (18.76 ± 2.19 vs. 17.48 ± 3.34) than those in Group A (all Ps < 0.05). Homogeneous contrast enhancement from the ascending thoracic aorta to the infrarenal abdominal aorta was significantly superior in Group B (P < 0.05). Low-concentration CM and a low-tube-voltage combination technique using IR is a feasible method, showing sufficient contrast enhancement and image quality.
- Subjects
IODINATION; CONTRAST media; IMAGE reconstruction; COMPUTED tomography; RADIATION exposure; IMAGE quality analysis; ANGIOGRAPHY; AORTA; AORTIC diseases; AUTOMATION; COMPARATIVE studies; DIAGNOSTIC imaging; GROWTH factors; RESEARCH methodology; MEDICAL cooperation; COMPUTERS in medicine; RADIATION doses; RESEARCH; PILOT projects; EVALUATION research; PREDICTIVE tests; DRUG administration; DRUG dosage
- Publication
International Journal of Cardiovascular Imaging, 2016, Vol 32, p53
- ISSN
1569-5794
- Publication type
journal article
- DOI
10.1007/s10554-015-0816-6