Abstract
Objective: A 320-row multidetector CT (MDCT) is expected for a good artery-vein separation in terms of temporal resolution. However, a shortened scan duration may lead to insufficient vascular enhancement. We assessed the optimal scan timing for the artery-vein separation at whole-brain CT angiography (CTA) when bolus tracking was used at 320- row MDCT. Methods: We analyzed 60 patients, who underwent whole-brain four-dimensional CTA. Difference in CT attenuation between the internal carotid artery (ICA) and the superior sagittal sinus (Datt) was calculated in each phase. Using a visual evaluation score for the depiction of arteries and veins, we calculated the difference between the mean score for the intracranial arteries and the mean score for the veins (Dscore). We assessed the time at which the maximum Datt and Dscore were simultaneously observed. Results: The maximum Datt was observed at 6.0 s and 8.0s in the arterial-dominant phase and at 16.0 s and 18.0 s in the venous-dominant phase after the contrast media arrival time at the ICA (Taa). The maximum Dscore was observed at 6.0s and 8.0s in the arterial-dominant phase and at 16.0s in the venous-dominant phase after the Taa. There were no statistically significant differences in Datt (p50.375) or Dscore (p50.139) between these scan timings. Conclusion: The optimal scan timing for artery-vein separation at whole-brain CTA was 6.0 s or 8.0 s for the arteries and 16.0 s for the veins after the Taa. Advances in knowledge: Optimal scan timing allowed us to visualize intracranial arteries or veins with minimal superimposition.
| Original language | English |
|---|---|
| Article number | 20160634 |
| Journal | British Journal of Radiology |
| Volume | 90 |
| Issue number | 1070 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Radiology Nuclear Medicine and imaging
Cite this
Optimal scan timing for artery-vein separation at whole-brain CT angiography using a 320-row MDCT volume scanner. / Shirasaka, Takashi; Hiwatashi, Akio; Yamashita, Koji; Kondo, Masatoshi; Hamasaki, Hiroshi; Shimomiya, Yamato; Nakamura, Yasuhiko; Funama, Yoshinori; Honda, Hiroshi.
In: British Journal of Radiology, Vol. 90, No. 1070, 20160634, 01.01.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Optimal scan timing for artery-vein separation at whole-brain CT angiography using a 320-row MDCT volume scanner
AU - Shirasaka, Takashi
AU - Hiwatashi, Akio
AU - Yamashita, Koji
AU - Kondo, Masatoshi
AU - Hamasaki, Hiroshi
AU - Shimomiya, Yamato
AU - Nakamura, Yasuhiko
AU - Funama, Yoshinori
AU - Honda, Hiroshi
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Objective: A 320-row multidetector CT (MDCT) is expected for a good artery-vein separation in terms of temporal resolution. However, a shortened scan duration may lead to insufficient vascular enhancement. We assessed the optimal scan timing for the artery-vein separation at whole-brain CT angiography (CTA) when bolus tracking was used at 320- row MDCT. Methods: We analyzed 60 patients, who underwent whole-brain four-dimensional CTA. Difference in CT attenuation between the internal carotid artery (ICA) and the superior sagittal sinus (Datt) was calculated in each phase. Using a visual evaluation score for the depiction of arteries and veins, we calculated the difference between the mean score for the intracranial arteries and the mean score for the veins (Dscore). We assessed the time at which the maximum Datt and Dscore were simultaneously observed. Results: The maximum Datt was observed at 6.0 s and 8.0s in the arterial-dominant phase and at 16.0 s and 18.0 s in the venous-dominant phase after the contrast media arrival time at the ICA (Taa). The maximum Dscore was observed at 6.0s and 8.0s in the arterial-dominant phase and at 16.0s in the venous-dominant phase after the Taa. There were no statistically significant differences in Datt (p50.375) or Dscore (p50.139) between these scan timings. Conclusion: The optimal scan timing for artery-vein separation at whole-brain CTA was 6.0 s or 8.0 s for the arteries and 16.0 s for the veins after the Taa. Advances in knowledge: Optimal scan timing allowed us to visualize intracranial arteries or veins with minimal superimposition.
AB - Objective: A 320-row multidetector CT (MDCT) is expected for a good artery-vein separation in terms of temporal resolution. However, a shortened scan duration may lead to insufficient vascular enhancement. We assessed the optimal scan timing for the artery-vein separation at whole-brain CT angiography (CTA) when bolus tracking was used at 320- row MDCT. Methods: We analyzed 60 patients, who underwent whole-brain four-dimensional CTA. Difference in CT attenuation between the internal carotid artery (ICA) and the superior sagittal sinus (Datt) was calculated in each phase. Using a visual evaluation score for the depiction of arteries and veins, we calculated the difference between the mean score for the intracranial arteries and the mean score for the veins (Dscore). We assessed the time at which the maximum Datt and Dscore were simultaneously observed. Results: The maximum Datt was observed at 6.0 s and 8.0s in the arterial-dominant phase and at 16.0 s and 18.0 s in the venous-dominant phase after the contrast media arrival time at the ICA (Taa). The maximum Dscore was observed at 6.0s and 8.0s in the arterial-dominant phase and at 16.0s in the venous-dominant phase after the Taa. There were no statistically significant differences in Datt (p50.375) or Dscore (p50.139) between these scan timings. Conclusion: The optimal scan timing for artery-vein separation at whole-brain CTA was 6.0 s or 8.0 s for the arteries and 16.0 s for the veins after the Taa. Advances in knowledge: Optimal scan timing allowed us to visualize intracranial arteries or veins with minimal superimposition.
UR - http://www.scopus.com/inward/record.url?scp=85011685239&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85011685239&partnerID=8YFLogxK
U2 - 10.1259/bjr.20160634
DO - 10.1259/bjr.20160634
M3 - Article
C2 - 27995807
AN - SCOPUS:85011685239
VL - 90
JO - British Journal of Radiology
JF - British Journal of Radiology
SN - 0007-1285
IS - 1070
M1 - 20160634
ER -