The aim of this exhibit is to review various latest imaging techniques that can improve the image quality and diagnostic utility of CTA.

CT angiography (CTA) has been established as the first line imaging modality for evaluation of vascular anatomy and pathology. It plays a vital role in diagnosing and monitoring conditions such as stenosis, occlusion, thrombo-embolism, aneurysm, dissection, bleed and endoleak of a stent graft. Its advantages in comparison to digital subtraction angiography (DSA) are shorter acquisition time, non-invasive nature, less procedural complications and the ability to study soft tissue structures around the blood vessels. These are especially useful in the emergency setting. CT angiographic image quality...

A number of techniques are available for improving image quality of CTA include: 1. Temporal resolution Increased number of multi-detector rows up to 320, dual tube configuration and faster rotation time in modern CT scanners produce superior temporal resolution which can be down to 66 msec. Latest development of soft-ware motion correction technique, eg. Snapshot freeze (GE Healthcare, Milwaukee, USA), may further lower the temporal resolution down to 28 msec (1)(Figure 2). All these can produce superior temporal resolution and help correcting motion artifact from...

CTA has become first line imaging method for many vascular conditions. The image quality can, however, be limited by motion and blooming artefacts and poor contrast in vessel lumen. CT technology is rapidly advancing. CTA is a prime example of utilizing some of these latest techniques that lead to superior diagnostic image quality with no compromise of radiation dose. Radiologists are no longer just imaging diagnosticians, but are also forefront technological experts who are able to guide the development and applications of new imaging techniques...

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