Keywords:
Not applicable, Prospective, Image verification, Technical aspects, CT-Angiography, CT, Contrast agents, Cardiovascular system, Arteries / Aorta, Performed at one institution
Authors:
G. S. Gallo1, R. Gerasia1, C. Caruso1, C. Tafaro1, C. Cannataci2, G. Gentile1, G. Mamone3, R. Miraglia4; 1Palermo/IT, 2Msida/MT, 3Palermo, It/IT, 4Palermo /IT
DOI:
10.26044/ecr2020/C-08062
Conclusion
Data from our study suggest that in obese patients (BMI > 29 kg/m2) it is possible to image the aortic annulus and aorto-iliac anatomy with high image quality using a low volume, multiphasic injection protocol (65 ml), as opposed to the protocol that is usually quoted in the literature for all patients (90 mL).
In the available literature, more papers describe the feasibility of transcatheter aortic valve replacement planning with a single reduced contrast media bolus injection of 40 or 70 mL using 320-row CT5 or ultra-low-dose CM injection protocols of only 20 mL using 128-detector-row dual-source CT with high-pitch spiral scan mode6. However, only a few specialized institutions can currently take advantage of the improved scan speed of the latest generations of CT scanners, including dual-source CT or wide-area detectors, while 64-slice CT remains the most frequently employed technology for clinical use in everyday practice. Using a conventional 64-slice CT system, which is still widely utilized in many cardiac centers, to perform a pre-TAVI CTA in these high risk surgical patients, we demonstrate that is possible to obtain an optimal combination of as low as possible a volume of CM together with the generation of a still image of the annulus to allow for accurate measurement.