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KMID : 1094020170340050330
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Journal of Veterinary Clinics
2017 Volume.34 No. 5 p.330 ~ p.334
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Establishment of Injection Protocol of Contrast Material in Pulmonary Angiography using Test Bolus Method and 16-Detector-Row Computed Tomography in Normal Beagle Dogs
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Choi Soo-Young
Kwon Young-Hang
Park Hyun-Young
Kwon Kyung-Hun
Lee Ki-Ja
Park In-Chul
Choi Ho-Jung
Lee Young-Won
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Abstract
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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.
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KEYWORD
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CTPA, dog, injection duration, injection rate, test bolus
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