Establishment of optimal scan delay for multi-phase computed tomography usingbolus-tracking technique in canine pancreas

[摘要] References(25)Cited-By(1)To establish a protocol for a multi-phase computed tomography (CT) of thecanine pancreas using the bolus-tracking technique, dynamic scan and multi-phase CT wereperformed in six normal beagle dogs. The dynamic scan was performed for 60 sec at 1-secintervals after the injection (4 ml/sec) of a contrast medium, andintervals from aortic enhancement appearance to aortic, pancreatic parenchymal and portalvein peaks were measured. The multi-phase CT with 3 phases was performed three times usinga bolus-tracking technique. Scan delays were 0, 15 and 30 in first multi-phase scan; 5, 20and 35 in second multi-phase scan; and 10, 25 and 40 sec in third multi-phase scan,respectively. Attenuation values and contrast enhancement pattern were analyzed from theaorta, pancreas and portal vein. The intervals from aortic enhancement appearance toaortic, pancreatic parenchymal and portal vein peaks were 3.8 ± 0.7, 8.7 ± 0.9 and 13.3 ±1.5 sec, respectively. The maximum attenuation values of the aorta, pancreatic parenchymaand portal vein were present at scan sections with no scan delay, a 5-sec delay and a10-sec delay, respectively. When a multi-phase CT of the canine pancreas is triggered ataortic enhancement appearance using a bolus-tracking technique, the recommended optimaldelay times of the arterial and pancreatic parenchymal phases are no scan delay and 5 sec,respectively.

[学科分类] 兽医学

[关键词] bolus-tracking technique;canine;multi-phase CT;pancreas