Yaying Yang, Presenter: Nothing to Disclose

Bin Yang, Abstract Co-Author: Nothing to Disclose

Wei Zhao, Abstract Co-Author: Nothing to Disclose

To investigate the image quality (IQ) of intracranial aneurysms by dual energy CTA with selective photon shield (SPS) acquisition and SAFIRE reconstruction

80 patients suspected with intracranial aneurysms were randomly assigned for CTA examinations as follows: Group1: tube voltages80kV/sn140kV; tube currents200mAs/100mAs;SAFIREwas applied..Group 2: tube voltages 80kV/ sn140kV, tube currents 300mAs/ 150mAs. The other parameters are the same. The IQ (subjective as well as objective IQ) and radiation dosage of the two groups were compared. In the meanwhile, the location, numbers and morphology of aneurysm in addition to neck display degree and neck size of the two groups were compared

There was no significant difference on SNR between the two groups (P>0.05), however, the noise was lower in group 1 compared to group 2 (P＜0.05). No significant CNR difference was shown between these two groups (p>0.05). The dose in group 1 was lower than that in group 2 (0.54±0.06 mSv vs 0.79±0.04 mSv). With DSA as reference, the aneurysm detection rate was 100% (29/29) for group 1 vs 96% (25/26) for group 2. There were no significant differences on the location, number and neck size of aneurysm between the two groups (p>0.05)

With SPS technique in combination with SAFIRE, radiation dose could be reduced while IQ and diagnostic accuracy are increased in the detection of intracranial aneurysms by CT DE mode.

Very well

Yang, Y, Yang, B, Zhao, W, The Evaluation of Image Quality of Intracranial Aneurysms by Dual Energy CTA with SPS Technique as well as SAFIRE Reconstruction.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14005890.html