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

Choi SY, Choi HJ, Lee KJ, Lee YW - J. Vet. Med. Sci. (2015)

Bottom Line: The multi-phase CT with 3 phases was performed three times using a bolus-tracking technique.Scan delays were 0, 15 and 30 in first multi-phase scan; 5, 20 and 35 in second multi-phase scan; and 10, 25 and 40 sec in third multi-phase scan, respectively.The maximum attenuation values of the aorta, pancreatic parenchyma and portal vein were present at scan sections with no scan delay, a 5-sec delay and a 10-sec delay, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon 305-764, South Korea.

ABSTRACT
To establish a protocol for a multi-phase computed tomography (CT) of the canine pancreas using the bolus-tracking technique, dynamic scan and multi-phase CT were performed in six normal beagle dogs. The dynamic scan was performed for 60 sec at 1-sec intervals after the injection (4 ml/sec) of a contrast medium, and intervals from aortic enhancement appearance to aortic, pancreatic parenchymal and portal vein peaks were measured. The multi-phase CT with 3 phases was performed three times using a bolus-tracking technique. Scan delays were 0, 15 and 30 in first multi-phase scan; 5, 20 and 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 the aorta, pancreas and portal vein. The intervals from aortic enhancement appearance to aortic, 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 parenchyma and portal vein were present at scan sections with no scan delay, a 5-sec delay and a 10-sec delay, respectively. When a multi-phase CT of the canine pancreas is triggered at aortic enhancement appearance using a bolus-tracking technique, the recommended optimal delay times of the arterial and pancreatic parenchymal phases are no scan delay and 5 sec, respectively.

No MeSH data available.


Transverse CT images with no scan delay (A), 5-sec scan delay (B), 10-sec scan delay(C) and 30-sec scan delay (D) at the level of pancreatic body. (A) Arterial phaseshows the maximal aortic contrast enhancement (white arrow). (B) Pancreaticparenchymal phase shows the maximal contrast enhancement of pancreas (asterisk). (C)Portal phase has the heterogeneous maximal contrast enhancement of portal vein (blackarrow). (D) Delayed phase shows the homogenous venous contrast enhancement (blackarrowhead) and hepatic enhancement.
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fig_001: Transverse CT images with no scan delay (A), 5-sec scan delay (B), 10-sec scan delay(C) and 30-sec scan delay (D) at the level of pancreatic body. (A) Arterial phaseshows the maximal aortic contrast enhancement (white arrow). (B) Pancreaticparenchymal phase shows the maximal contrast enhancement of pancreas (asterisk). (C)Portal phase has the heterogeneous maximal contrast enhancement of portal vein (blackarrow). (D) Delayed phase shows the homogenous venous contrast enhancement (blackarrowhead) and hepatic enhancement.

Mentions: Data are expressed as mean ± SD. a–f) The values sharing the same superscript letterdiffer significantly from each other (P<0.05).


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

Choi SY, Choi HJ, Lee KJ, Lee YW - J. Vet. Med. Sci. (2015)

Transverse CT images with no scan delay (A), 5-sec scan delay (B), 10-sec scan delay(C) and 30-sec scan delay (D) at the level of pancreatic body. (A) Arterial phaseshows the maximal aortic contrast enhancement (white arrow). (B) Pancreaticparenchymal phase shows the maximal contrast enhancement of pancreas (asterisk). (C)Portal phase has the heterogeneous maximal contrast enhancement of portal vein (blackarrow). (D) Delayed phase shows the homogenous venous contrast enhancement (blackarrowhead) and hepatic enhancement.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591144&req=5

fig_001: Transverse CT images with no scan delay (A), 5-sec scan delay (B), 10-sec scan delay(C) and 30-sec scan delay (D) at the level of pancreatic body. (A) Arterial phaseshows the maximal aortic contrast enhancement (white arrow). (B) Pancreaticparenchymal phase shows the maximal contrast enhancement of pancreas (asterisk). (C)Portal phase has the heterogeneous maximal contrast enhancement of portal vein (blackarrow). (D) Delayed phase shows the homogenous venous contrast enhancement (blackarrowhead) and hepatic enhancement.
Mentions: Data are expressed as mean ± SD. a–f) The values sharing the same superscript letterdiffer significantly from each other (P<0.05).

Bottom Line: The multi-phase CT with 3 phases was performed three times using a bolus-tracking technique.Scan delays were 0, 15 and 30 in first multi-phase scan; 5, 20 and 35 in second multi-phase scan; and 10, 25 and 40 sec in third multi-phase scan, respectively.The maximum attenuation values of the aorta, pancreatic parenchyma and portal vein were present at scan sections with no scan delay, a 5-sec delay and a 10-sec delay, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon 305-764, South Korea.

ABSTRACT
To establish a protocol for a multi-phase computed tomography (CT) of the canine pancreas using the bolus-tracking technique, dynamic scan and multi-phase CT were performed in six normal beagle dogs. The dynamic scan was performed for 60 sec at 1-sec intervals after the injection (4 ml/sec) of a contrast medium, and intervals from aortic enhancement appearance to aortic, pancreatic parenchymal and portal vein peaks were measured. The multi-phase CT with 3 phases was performed three times using a bolus-tracking technique. Scan delays were 0, 15 and 30 in first multi-phase scan; 5, 20 and 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 the aorta, pancreas and portal vein. The intervals from aortic enhancement appearance to aortic, 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 parenchyma and portal vein were present at scan sections with no scan delay, a 5-sec delay and a 10-sec delay, respectively. When a multi-phase CT of the canine pancreas is triggered at aortic enhancement appearance using a bolus-tracking technique, the recommended optimal delay times of the arterial and pancreatic parenchymal phases are no scan delay and 5 sec, respectively.

No MeSH data available.