**8. Non-invasive imaging modalities**

Selective coronary angiography does not always assure the diagnosis of ANOCOR, particularly to identify accurately the origin of the RCA from the left sinus, or to delineate the initial course of an ectopic vessel. Over the last decade, the multislice tomographic imaging made dramatically breakthroughs, so much that the electrocardiography-gated multidetector coronary CT angiography has become the method of choice for evaluation of known or suspected ANOCOR (Sundaram et al., 2010). Tomographic reconstructed images provide useful supplemental information with volumetric views allowing an analysis of ANOCOR in 3-D spatial orientation (Gharib et al., 2008, Manghat et al., 2005). However, other non-invasive methods have been used to diagnose or evaluate ANOCOR.
