Comparative study of the image quality of twin beam dual energy and single energy carotid CT angiography

Wang, Yue; Wang, Yang; Hu, Peng; Feng, Niu Zhong; Jie, Hu

doi:10.1016/j.ejrad.2022.110160

Cited by 5 publications

(11 citation statements)

References 32 publications

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“…The average contrast opacification of the carotid bulb was 498 HU in the low-dose protocol and 470 HU in the standard protocol, which means that the voltage of the X-ray tube with low kV settings and reduced contrast dose can produce a contrast attenuation of >400 HU in the arterial system (22). It is known that lowering the tube voltage in CTA increases intravascular contrast opacification due to increased intravascular iodine attenuation at low voltage, as the mean energy of X-ray photons approaches the k-edge of iodine, which is 33.2 keV (23).…”

Section: Discussionmentioning

confidence: 99%

Benefits of low-dose carotid CT angiography in stroke patients

Kurić,

Kristić,

Bukvić

et al. 2023

JHSCI

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Introduction: Computed tomography angiography (CTA) represents the gold standard as a method for the diagnosis of carotid artery diseases. The current topic is the use of CTA for the evaluation of carotid arteries with a reduction in the dose of contrast agent and dose of ionizing radiation, which, with adequate preparation, would enable the use of this method in some risk groups. The aim of this study was to evaluate the feasibility and image quality of a new low-dose CTA protocol in comparison with a standard protocol. Methods: Forty patients with recumbent ischemic stroke were included in the study, twenty of whom underwent lowdose CTA, and the remaining twenty underwent a standard CTA protocol of the carotid arteries. Results: No significant difference was found between the mean values of CT number (Hounsfield unit), signal-to-noise ratio, contrast-to-noise ratio, and subjective assessment of image quality in the comparison of the control and experimental groups. CT dose index, volume, and dose length product were significantly lower in patients who underwent lowdose carotid CTA. There was no significant difference in the degree of carotid stenosis between color Doppler and CTA. Conclusion: The use of the low-dose protocol for carotid CTA allows the application of this method in risk groups, in which it was previously not possible to perform, with the same image quality in comparison with the standard protocol.

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Section: Discussionmentioning

confidence: 99%

Benefits of low-dose carotid CT angiography in stroke patients

Kurić,

Kristić,

Bukvić

et al. 2023

JHSCI

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“…For this purpose, we compared the objective image parameters as well as the subjective image criteria of PER and MERs at different levels on the PCCT scanner. The choice of quantitative parameters—signal, noise, SNR and CNR—as well as the criteria for the qualitative assessment of the image quality were adapted from previous studies to ensure caution in the first comparisons [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Discussionmentioning

confidence: 99%

Photon Counting CT Angiography of the Head and Neck: Image Quality Assessment of Polyenergetic and Virtual Monoenergetic Reconstructions

et al. 2022

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Background: The purpose of the present study was the evaluation of the image quality of polyenergetic and monoenergetic reconstructions (PERs and MERs) of CT angiographies (CTAs) of the head and neck acquired with the novel photon counting CT (PCCT) method in clinical routine. Methods: Thirty-seven patients were enrolled in this retrospective study. Quantitative image parameters of the extracranial, intracranial and cerebral arteries were evaluated for the PER and MER (40–120 keV). Additionally, two radiologists rated the perceived image quality. Results: The mean CTDIvol used in the PCCT was 8.31 ± 1.19 mGy. The highest signal within the vessels was detected in the 40 keV MER, whereas the lowest noise was detected in the 115 keV MER. The most favorable contrast-to-noise-ratio (CNR) and signal-to-noise-ratio (SNR) were detected in the PER and low keV MER. In the qualitative image analysis, the PER was superior to the MER in all rated criteria. For MER, 60–65 keV was rated as best image quality. Conclusion: Overall, PCCT offers excellent image quality for CTAs of the head and neck. At the current state, the PER of the PCCT seems to be the most favorable reconstruction for diagnostic reporting.

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“…Interestingly, the same study found IPH to be predictive of 30-day stroke recurrence using a 150 HU cutoff. DECT also proved helpful in mitigating calcium blooming artifacts [17][18][19], differentiating LRNC from other non-calcified plaque components [12], selecting the antiplatelet regimen following acute carotid stenting in tandem occlusions [20], and improving image quality over conventional CT angiography [21,22]. Finally, photon counting CT, the most advanced implementation of spectral CT, by providing improved spatial resolution, better spectral separation, and lower noise, is showing promise in determining fibrous cap and noncalcified plaque components [23,24].…”

Section: Role Of Spectral Ctmentioning

confidence: 99%