Rapid imaging protocol in Acute Stroke by Area Detector CT

This poster is published under an open license. Please read the disclaimer for further details.

Congress:

ECR 2014

Poster Number:

C-1699

Type:

Scientific Exhibit

Keywords:

Neuroradiology brain, CNS, Interventional vascular, CT-Angiography, Image manipulation / Reconstruction, CT, Imaging sequences, Technology assessment, Ischaemia / Infarction

Authors:

T. Mori¹, T. Iwata², Y. Miyazaki², Y. Tanno², S. Kasakura², Y. Aoyagi², K. Yoshioka²; ¹Kamakura, Kanagawa/JP, ²Kamakura/JP

DOI:

10.1594/ecr2014/C-1699

DOI-Link:

https://dx.doi.org/10.1594/ecr2014/C-1699

Fig. 1: Aquilion ONE™ (Toshiba Medical) 320-row Area Detector CT

Fig. 2: Acute Stroke Imaging Protocol of 320-row Area Detector CT

Fig. 3: Time Differences Between 0.5mm and 1.0mm volume scans

Aims and objectives

The wide area detector CT (ADCT) enables volume scanning (VS) for the whole brain within one rotation and can provide whole brain CT perfusion (CTP) and dynamic vascular analysis (3D/4D-CTA) in one examination. However, image reconstruction and transfer are too time-consuming in acute stroke setting, because of much volumetric data (VD). The aim of our study was to design the acute stroke protocol of ADCT scanning with short time of image reconstruction and transfer within acceptable limits of quality loss.

Methods and materials

VS using the ADCT (Aquilion ONE, Toshiba) for CTA and CTP of the whole brain was performed with injecting non-ionic contrast medium 40ml (iopamidol 370) at a rate of 4mL/s. CTP used 1 s single rotation intermittent dataset scans acquired at 80kVp. Beginning 8 s after contrast medium injection, 18 intermittent volume scans at 100mA are acquired every other second for 34 s during the contrast medium arrival. Ten datasets were then acquired every 5 s for 45 s to complete a 28 volume dataset....

Results

VD was transferred to workstation in about 12 minutes 28 seconds since starting VS and both CTP and CTA was generated in mean 2 minutes 11 seconds.Total time until viewing images on PACS was about 14 minutes 39 seconds. Image quality of CTA and CTP maps was enough in acute stroke setting. Time intensity curves also were drawed from CT perfusion images where region of interests (ROIs) were set in the bilateral territory of the MCA. 1 Compared to initial protocol of a 0.5-mm thickness...

Conclusion

Our protocol can provide the whole brain dynamic 4-dimentional CT angiograms and CT perfusion images of ADCT within 15 minutes in acute stroke setting and the abundant information may change and improve the strategy of acute stroke therapy.

Personal information

Takahisa Mori, MD, PhD Department of Stroke Treatment Shonan Kamakura General Hospital Stroke Center Kamakura City, Japan [email protected]

References

1. Mori T; Iwata T; Miyazaki Y; et al.Simple And Easy Way Using Time-Intensity Curve of Perfusion-Weighted Images to Find Penumbra In Stroke Patients Within 4.5 Hours Of Onset Due To The Carotid Artery Occlusion. Stroke2013; 44: ATP53