Evaluation of Protocol for Abdominal Contrast Computed Tomography in Small-Breed Dogs

KUTARA Kenji, ASANO Kazushi, KITAGAWA Masato, ITO Daisuke, TESHIMA Kenji, NAKAYAMA Tomohiro, WATARI Toshihiro, TANAKA Shigeo

doi:10.12935/jvma.64.385

The purpose of this study was to investigate the abdominal perfusion dynamics of contrast agent for computed tomography (CT) in small-breed dogs. In this study, 49 dogs were used and categorized in 5 groups with different injection doses and duration and different of over-the-needle catheter sizes. Each hounsfield unit (HU) in the aorta (AO), caudal vena cava (CVC), and portal vein (PV) was recorded for 60 sec. A time- intensity curve was created for each group. In AO, the mean time of appearance of the contrast medium (Tup) was approximately 12 sec in all groups. However, the mean HU and time (Tpeak) of the maximum contrast enhancement were different in each group. In CVC, Tup was approximately 20 sec, and Tpeak was 33-39 sec in all groups. In PV, Tup was approximately 22 sec, and Tpeak was 40-45 sec in all groups. In CVC and PV, the mean HU of maximum contrast enhancement was influenced by the injection dose. None of the data were correlated with body weight or heart rate. In conclusion, it is suggested that the contrast effects of abdominal CT in small-breed dogs could be evaluated objectively with the contrast protocol used in this study.

Evaluation of Protocol for Abdominal Contrast Computed Tomography in Small-Breed Dogs

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