Introduction: Multidetector Computed Tomography Angiography (MDCTA) is presently the imaging modality of choice for aortic disease. However, the effective radiation dose and the risk related to the use of contrast agents associated with MDCTA is an issue of concern. Aim of this study was to assess image quality of a low dose ECG-gated MDCTA of thoracic aorta using different concentration contrast media without tailored injection protocol. Methods: Two-hundred patients were randomised into four different scan protocols: Group A (Iodixanol 320 and 80 Kvp tube voltage), Group B (Iodixanol 320 and 100Â Kvp tube voltage), Group C (Iomeprol 400 and 80Â Kvp tube voltage) and Group D (Iomeprol 400 and 100Â Kvp tube voltage). Image quality, noise, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and effective dose (ED) were compared among groups. Results: No significant differences in image noise, SNR and CNR between groups with the same tube voltage. Significant differences in SNR and CNR were found among groups with 80Â kV versus groups using 100Â kV but without differences in terms of image quality. ED was significantly lower in groups with 80Â kV. Conclusions: Multidetector Computed Tomography Angiography protocols using 80Â kV and low concentration contrast media are feasible without need of tailored injection protocols.
Overall evaluability of low dose protocol for computed tomography angiography of thoracic aorta using 80kV and iterative reconstruction algorithm using different concentration contrast media / A.D. Annoni, M.E. Mancini, D. Andreini, A. Formenti, S. Mushtaq, E. Nobili, M. Guglielmo, A. Baggiano, E. Conte, M. Pepi. - In: JOURNAL OF MEDICAL IMAGING AND RADIATION ONCOLOGY. - ISSN 1754-9477. - 61:5(2017), pp. 614-621.
|Titolo:||Overall evaluability of low dose protocol for computed tomography angiography of thoracic aorta using 80kV and iterative reconstruction algorithm using different concentration contrast media|
|Parole Chiave:||CT angiography; dose reduction; ECG gated scan protocols, contrast agents; thoracic aorta; Aged; Aorta, Thoracic; Aortic Diseases; Cardiac-Gated Imaging Techniques; Computed Tomography Angiography; Contrast Media; Female; Humans; Iopamidol; Male; Middle Aged; Signal-To-Noise Ratio; Triiodobenzoic Acids; Radiation Dosage; Oncology; Radiology, Nuclear Medicine and Imaging|
|Settore Scientifico Disciplinare:||Settore MED/11 - Malattie dell'Apparato Cardiovascolare|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1111/1754-9485.12608|
|Appare nelle tipologie:||01 - Articolo su periodico|
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