Low radiation dose 256-MDCT angiography of the carotid arteries: Effect of hybrid iterative reconstruction technique on noise, artifacts, and image quality

Kondratyev, E. V.; Kаrmаzаnovsky, G. G.

doi:10.1016/j.ejrad.2013.08.053

Cited by 13 publications

(14 citation statements)

References 22 publications

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“…Compared to MRI, cCT is a faster and more widely available imaging modality with lower cost [15]–[16]. The radiological examination of an acute stroke patient usually includes not only CT of the brain, but also carotid artery CT angiography combined with imaging of the aortic arch [2].…”

Section: Discussionmentioning

confidence: 99%

“…The radiological examination of an acute stroke patient usually includes not only CT of the brain, but also carotid artery CT angiography combined with imaging of the aortic arch [2]. Current prospective ECG-gated CT scans allow extremely low radiation doses [16]. Thus, by extending the scanned area from the carotid arteries and aortic arch down to the level of the LAA would not significantly increase the radiation dose, but may provide a valid method for evaluating the LAA in acute stroke patients [38].…”

Section: Discussionmentioning

confidence: 99%

“…Increasing evidence indicates that the upper quintile of LAA volume is a powerful predictor of stroke risk [15]. Novel low-dose computed tomography (CT) scanners may increase pressure to use cardiac CT (cCT) for both etiological assessment and risk stratification [16]. Although 2D transesophageal echocardiography (TEE) is currently the most commonly used imaging modality for preoperative assessment, the use of 3D approaches have shown to provide additive information in cases of complex morphology of the LAA [17].…”

Section: Introductionmentioning

confidence: 99%

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Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

et al. 2014

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ObjectivesLeft atrial appendage (LAA) dilatation and morphology may influence an individual's risk for intracardiac thrombi and ischemic stroke. LAA size and morphology can be evaluated using cardiac computed tomography (cCT). The present study evaluated the reproducibility of LAA volume and morphology assessments.MethodsA total of 149 patients (47 females; mean age 60.9±10.6 years) with suspected cardioembolic stroke/transient ischemic attack underwent cCT. Image quality was rated based on four categories. Ten patients were selected from each image quality category (N = 40) for volumetric reproducibility analysis by two individual readers. LAA and left atrium (LA) volume were measured in both two-chamber (2CV) and transversal view (TV) orientation. Intertechnique reproducibility was assessed between 2CV and TV (200 measurement pairs). LAA morphology (A = Cactus, B = ChickenWing, C = WindSock, D = CauliFlower), LAA opening height, number of LAA lobes, trabeculation, and orientation of the LAA tip was analysed in all study subjects by three individual readers (447 interobserver measurement pairs). The reproducibility of volume measurements was assessed by intra-class correlation (ICC) and the reproducibility of LAA morphology assessments by Cohen's kappa.ResultsThe intra-observer and interobserver reproducibility of LAA and LA volume measurements was excellent (ICCs>0.9). The LAA (ICC = 0.954) and LA (ICC = 0.945) volume measurements were comparable between 2CV and TV. Morphological classification (ĸ = 0.24) and assessments of LAA opening height (ĸ = 0.1), number of LAA lobes (ĸ = 0.16), trabeculation (ĸ = 0.15), and orientation of the LAA tip (ĸ = 0.37) was only slightly to fairly reproducible.ConclusionsLA and LAA volume measurements on cCT provide excellent reproducibility, whereas visual assessment of LAA morphological features is challenging and results in unsatisfactory agreement between readers.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

et al. 2014

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“…CTP imagings is more widely available and offers a rapid and accurate quantification of the examined perfusion parameters, but accompanied with a radiation burden. Some technologies and sofwares have been developed for significantly reducing the radiation dose [21,22] . No radiation is superiority for MR performent.…”

Section: Pei (Hu)mentioning

confidence: 99%

Pleomorphic Adenoma Versus Warthin Tumor of the Parotid Gland: Diagnostic Value of CT Perfusion Imaging and Its Pathologic Explanation

Fang

Tian

et al. 2016

Journal of Tumor

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“…15 Despite being slower and more computationally demanding, IR is suggested to reduce radiation dose without compromising image quality. 16 Research to date has explored the application of IR in chest CT 17 and coronary stent analyses. 18 Both of these studies suggest that IR is able to reduce radiation dose while maintaining diagnostic image quality.…”

Section: Introductionmentioning

confidence: 99%

Maintaining image quality and reducing dose in prospectively-triggered CT coronary angiography: A systematic review of the use of iterative reconstruction

2016

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a b s t r a c tIntroduction: Coronary computed tomography angiography (CCTA) is a reliable, minimally invasive technique used in the diagnosis and characterisation of coronary artery disease. Within this modality iterative reconstruction has the potential to maintain image quality whilst reducing radiation dose. Methods: A priori search terms and inclusion/exclusion criteria were developed. Results: Three studies were included in the review which analysed a total of 227 participants. As CTDI vol decreased there was no significant change in objective image quality, although some subjective image quality scores decreased. Discussion: The decrease of subjective image quality scores may be explained as a reaction to the difference in image appearance of the iterative reconstruction images; a potential reduction in dynamic range; and the number of scorers used. Conclusion: Iterative reconstruction can be utilized as a tool to significantly reduce patients' exposure to ionising radiation; however there may be implications for radiologists/cardiologist in the interpretation of these images.

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Low radiation dose 256-MDCT angiography of the carotid arteries: Effect of hybrid iterative reconstruction technique on noise, artifacts, and image quality

Cited by 13 publications

References 22 publications

Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

Pleomorphic Adenoma Versus Warthin Tumor of the Parotid Gland: Diagnostic Value of CT Perfusion Imaging and Its Pathologic Explanation

Maintaining image quality and reducing dose in prospectively-triggered CT coronary angiography: A systematic review of the use of iterative reconstruction

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