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KMID : 1094020180350030093
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Journal of Veterinary Clinics
2018 Volume.35 No. 3 p.93 ~ p.96
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Establishment of Injection Protocol of Test Bolus for Precise Scan Timing in Canine Abdominal Multi-Phase Computed Tomography
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Choi Soo-Young
Lee In
Choi Ho-Jung
Lee Ki-Ja
Park In-Chul
Lee Young-Won
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Abstract
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This study aimed to establish an injection protocol to determine the precise CT scan timing in canineabdominal multi-phase CT using the test bolus method. Three dynamic scans with different contrast injection parameterswere performed using a crossover design in eight normal beagle dogs. A contrast material was administered at a fixeddose of 200 mg iodine/kg as a test bolus for dynamic scans 1 and 2, and 600 mg iodine/kg as a main bolus for dynamicscan 3. The contrast materials were administered with 1 ml/s in dynamic scan 1, and 3 ml/s in dynamic scan 2 and3. The mean arrival time to the appearance of aortic enhancement in dynamic scan 3 was similar to that in dynamicscan 2, and different significantly to that in dynamic scan 1. The mean arrival time to the peak aortic and pancreaticparenchymal enhancement in dynamic scan 3 was similar to that in dynamic scan 1, and different significantly tothat in dynamic scan 2. In multi-phase CT scan, a test bolus should be injected with the same injection duration ofa main bolus, to obtain the precise arrival times to peak of arterial or pancreatic parenchymal enhancement.
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KEYWORD
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CT, Dogs, Injection duration, Injection rate, Test bolus
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