| Compact-bolus dynamic CT protocol with a test bolus technique in 64-MDCT coronary angiography: comparison of fixed injection rate and duration protocol. | |
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MedLine Citation:
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PMID: 23196822 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: We compared the fixed injection rate protocol (P2) with the fixed injection duration protocol (P1) for coronary CT angiography using the test bolus technique. MATERIALS AND METHODS: We randomly assigned 100 patients to one of two protocols. In P1, they received 0.7 mL/kg Iohexol-350 in an injection duration of 9 s, and we selected a delay of 3 s after peak enhancement of test bolus scan. In P2, they received 0.7 mL/kg Iohexol-350 at an injection rate of 5 mL/s, and we selected a delay after peak enhancement of test bolus scan using the following formula: TID/2-2 s, where TID is the injection duration of full bolus. We compared attenuation values in the ascending aorta and coronary arteries and patient-to-patient enhancement variability at each segment. RESULTS: At all segments, CT attenuations of P2 were significantly greater than those of P1 (ascending aorta 400 ± 64 vs. 368 ± 60, P = 0.01; left main trunk 399 ± 67 vs. 369 ± 55, P = 0.02; proximal-RCA 393 ± 66 vs. 363 ± 56, P = 0.01). There was no significant difference in patient-to-patient enhancement variability at all segments between the two groups (P > 0.05). CONCLUSION: P2 yielded superior vessel enhancement and comparable patient-to-patient enhancement variability compared with P1 in thin patients. |
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Authors:
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Masafumi Kidoh; Takeshi Nakaura; Kazuo Awai; Daisuke Utsunomiya; Naritsugu Sakaino; Kazunori Harada; Shouzaburou Uemura; Yasuyuki Yamashita |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-30 |
Journal Detail:
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Title: Japanese journal of radiology Volume: - ISSN: 1867-108X ISO Abbreviation: Jpn J Radiol Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101490689 Medline TA: Jpn J Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Diagnostic Radiology, Amakusa Medical Center, Kameba 854-1, Amakusa, Kumamoto, 863-0046, Japan, masafkidoh@yahoo.co.jp. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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