Cardiology>>>>>Aorta And Hypertension
Question 10#

Which one of the following is true regarding CT of the aorta?

A. Helical CT scanners of four detector rows currently offer the optimal possible data acquisition for state of the art reconstruction of the aorta
B. ECG gating reduces motion artefact which is particularly useful when imaging the descending aorta
C. If appropriately acquired, a CT of the aorta and a CT coronary angiogram can be performed in a single acquisition
D. New-generation multidetector helical CT scanners show sensitivities up to 95% and specificities of 94%
E. In aortic dissection the scan should continue to the coeliac axis

Correct Answer is C

Comment:

Most centres have at least a 16-detector row of CT scanners. There are reports of excellent quality images of coronary arteries using prospective gating in 320-detector row CT. ECG gating helps reduce motion artefacts, particularly in the ascending aorta and for the coronary arteries. The sensitivities of the new generation of multidetector CT scanners are nearing 100% and specificity is 98–99%. It is recommended to scan from the thoracic inlet to the pelvis, including the femoral and iliac arteries (http://circ.ahajournals. org/content/121/13/e266.full.pdf).