Coronary CT angiography (CTA) is nowadays considered a non-invasive method to evaluate the coronary artery,
with high sensitivity and negative predictive value.
Increasing concerns have been raised regarding the radiation exposure associated with CTA.
The image reconstruction process is a fundamental determinant of image quality and,
of the radiation dose that is necessary for generating a diagnostic CT image.
The objective of our study was to evaluatethe effect of Adaptive – Iterative Dose Reduction (AIDR) on mean radiation dose and on image quality compared...
Methods and Materials
From september to december 2012,
we prospectively evaluated 100 consecutive patients undergoing a coronary CT angiography using a 640 slice CT scanner (Aquilion One,
Toshiba Medical Systems).
Patients included in the study have suspected coronary heart disease.
Were not included patients with previous coronary artery interventions including stenting and/or coronary artery bypass grafts.
In the first 50 patients,
we used higher tube current and FBP reconstruction algorithm; in the latter 50 patients,
we use lower tube current and AIDR reconstruction algorithm.
Anonymised images were transferred...
Mean radiation dose of AIDR group was 20% lower than that of FBP group (p=0,0012).
Signal – to – noise ratio and contrast – to – noise ratio were significantly higher in AIDR group (p < 0,005).
In coronary CT angiography,
compared with traditional FBP, reduce significantly mean dose improving the image quality.
Akahane et al.
Adaptive Iterative Dose Reduction in coronary CT angiography using 320-row CT: Assessment of radiation dose reduction and image quality.
Journal of Cardiovascular Computed Tomography (2012) 6,
2) Roh-Eul Yoo; Eun-Ah Park; Whal Lee et al.
Image quality of Adaptive Iterative Dose Reduction 3D of coronary CT angiography of 640-slice CT: comparison with filtered back-projectionThe International Journal Cardiovascular imaging.
2012 Aug 26.
Schoepf et al.
Coronary CT angiography: image quality,