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http://dx.doi.org/10.17555/jvc.2017.10.34.5.330

Establishment of Injection Protocol of Contrast Material in Pulmonary Angiography using Test Bolus Method and 16-Detector-Row Computed Tomography in Normal Beagle Dogs  

Choi, Sooyoung (College of Veterinary Medicine, Kangwon National University)
Kwon, Younghang (College of Veterinary Medicine, Chungnam National University)
Park, Hyunyoung (College of Veterinary Medicine, Chungnam National University)
Kwon, Kyunghun (College of Veterinary Medicine, Chungnam National University)
Lee, Kija (College of Veterinary Medicine, Kyungpook National University)
Park, Inchul (College of Veterinary Medicine, Kangwon National University)
Choi, Hojung (College of Veterinary Medicine, Chungnam National University)
Lee, Youngwon (College of Veterinary Medicine, Chungnam National University)
Publication Information
Journal of Veterinary Clinics / v.34, no.5, 2017 , pp. 330-334 More about this Journal
Abstract
The aim of this study was to establish an injection protocol of a test bolus and a main bolus of contrast material for computed tomographic pulmonary angiography (CTPA) for visualizing optimal pulmonary arteries in normal beagle dogs. CTPA using a test bolus method from either protocol A or B were performed in each of four normal beagle dogs. In protocol A, CTPA was conducted with a scan duration for around 8 s, setting the contrast enhancement peak of the pulmonary trunk in the middle of the scan duration. The arrival time to the contrast enhancement peak was predicted from a previous dynamic scan using a test bolus (150 mg iodine/kg) injected with the same injection duration using for a main bolus (450 mg iodine/kg). In protocol B, CTPA was started at the predicted appearance time of contrast material in the pulmonary trunk based on a previous dynamic scan using a test bolus injected with the same injection rate as a main bolus. CTPA using protocol A showed the optimal opacification of the pulmonary artery with pulmonary venous contamination. Proper CTPA images in the absence of venous contamination were obtained in protocol B. CTPA with a scan duration for 8 s should be started at the appearance time of contrast enhancement in the pulmonary trunk, which can be identified exactly when a test bolus is injected at the same injection rate used for the main bolus.
Keywords
CTPA; dog; injection duration; injection rate; test bolus;
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