1. Cardiac Output Obtained from Test Bolus Injections as a Factor in Contrast Injection Rate Revision of Following Coronary CT Angiography
- Author
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Yusuke Kawasumi, Haruo Saito, Kei Takase, Hideki Ota, Akihito Usui, Masahiko Konno, Toshiki Tateishi, Masashi Tsuda, Mitsuya Abe, and Yoshiyuki Hosokai
- Subjects
Adult ,Male ,medicine.medical_specialty ,Cardiac output ,Iohexol ,Myocardial Ischemia ,Contrast Media ,Coronary Angiography ,Young Adult ,Internal medicine ,medicine.artery ,Hounsfield scale ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Test bolus ,Cardiac Output ,Aged ,Retrospective Studies ,Aged, 80 and over ,Aorta ,Radiological and Ultrasound Technology ,business.industry ,Coronary ct angiography ,General Medicine ,Middle Aged ,medicine.anatomical_structure ,Contrast injection ,Cardiology ,Feasibility Studies ,Female ,Tomography ,Tomography, X-Ray Computed ,business ,Artery - Abstract
BackgroundOptimal contrast enhancement is crucial for the detection of coronary artery stenoses and atherosclerotic changes in coronary CT angiography (CTA).PurposeTo demonstrate the feasibility of using the cardiac output (CO) obtained from the test bolus injection data-set (COtest) as a factor in contrast injection rate revision of the following coronary CTA.Material and MethodsThe test bolus injection data-sets of 52 consecutive coronary CTAs were examined. COtest was calculated from the test bolus data-set. Aortic peak enhancement (APE) was measured on the following coronary CTA. We simulated the APE at a fixed contrast injection rate of 4 mL/s (simAPE) in each patient.ResultsThe ranges of COtest and simAPE were 2.82-7.56 L/min and 194-527 Hounsfield Units, respectively. There was a significant negative correlation (R = -0.802, P < 0.001) between simAPE and COtest.ConclusionCOtest can be used for injection rate revision on coronary CTA.
- Published
- 2012