Optimal injection method for long-range computed tomography angiography
| Autor: | Aogu Yamaguchi, Tsukasa Sasaki |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Computed Tomography Angiography TEC medicine.medical_treatment Physical Therapy Sports Therapy and Rehabilitation Slip (materials science) Signal-To-Noise Ratio Saline flush Imaging phantom 030218 nuclear medicine & medical imaging Injections 03 medical and health sciences 0302 clinical medicine medicine Radiology Nuclear Medicine and imaging Saline Computed tomography angiography Radiation medicine.diagnostic_test business.industry Phantoms Imaging General Medicine Contrast medium 030220 oncology & carcinogenesis Angiography Nuclear medicine business |
| Zdroj: | Radiological physics and technology. 10(3) |
| ISSN: | 1865-0341 |
| Popis: | We aimed to obtain high-stable computed tomography (CT) values for CT angiography (CTA). We verified the optimal use of the new protocol for long-range scanning using a contrast material flow phantom (Ichikawa, CT imaging theory. Igaku syoin Publishing, Tokyo, 8; Awai et al., Am J Roentgenol 186(2):379–385, 1) to obtain high-stable CT values (Fig. 2). We have developed a novel contrast injection method called the stable line imaging protocol (SLIP). This method involved a gradual reduction in the rate of administration of the contrast medium, which was accompanied by simultaneous administration of saline to compensate for the resultant decrease in the rate of administration. A saline flush was further added after the contrast medium injection. The rate of administration of the saline flush was the same as that of the initial contrast medium. We injected a contrast medium from the injector into the flow phantom. The time-enhancement curve (TEC) data were obtained five times by changing the injection method, and the average CT values were determined. The maximum simulation of the aortic peak enhancement of TEC was defined as pTEC. The time required to keep the CT value more than 80% of the pTEC was defined as the time period of contrast enhancement (p80). The pTEC of a single injection was 295.7 ± 5.3 HU, while that of SLIP was 296.5 ± 2.3 HU; the two values did not differ significantly. The p80 of a single injection was 19.1 ± 0.2 s, while that of SLIP was 23.2 ± 0.4 s; p80 of SLIP was 18% longer than that of the single injection. |
| Databáze: | OpenAIRE |
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