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Dual energy CT angiography in peripheral arterial stents: optimal scanning protocols with regard to image quality and radiation dose

  
@article{QIMS17101,
	author = {Abdulrahman Almutairi and Zakariya Al Safran and Saif A. AlZaabi and Zhonghua Sun},
	title = {Dual energy CT angiography in peripheral arterial stents: optimal scanning protocols with regard to image quality and radiation dose},
	journal = {Quantitative Imaging in Medicine and Surgery},
	volume = {7},
	number = {5},
	year = {2017},
	keywords = {},
	abstract = {Background: To determine the optimal scanning protocols of dual energy computed tomography angiography (DECTA) in terms of radiation dose and image quality assessment at different keV levels, and compare it with conventional computed tomography angiography (CTA) in patients treated with peripheral arterial stents.
Methods: Twenty-nine patients with previous stent placement in peripheral arteries were evaluated with DECTA. Images were reconstructed with virtual monochromatic spectral imaging (VMS) at 65, 68, 70 and 72 keV and adaptive statistical iterative reconstruction (ASIR) at 50% compared with CTA. Image quality comprising image noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were assessed, and radiation dose was compared. Effects of different type of peripheral arterial stents on image quality were also evaluated. Fifty-six uniquely identified stents that were located in common iliac arteries (CIA), external iliac arteries (EIA) and superficial femoral arteries (SFA) were evaluated.
Results: Within subjects, the results showed that DECTA images (VMS) had less noise than the CTA images for CIA, EIA and SFA stents, with the lowest noise at 72 keV. Also, the VMS images had greater SNR than the CTA images for the EIA stents (P},
	url = {http://qims.amegroups.com/article/view/17101}
}