Abstract: Ultrasound diagnosis has been used for abdominal aortic aneurysms and peripheral aneurysms for many years, yet the nuances required for proper interrogation and interpretation can be quite difficult. While CT and ultrasound have been used interchangeably, it is become clear that the measurements derived are not necessarily equivalent. Newer ultrasound technology allows CT and ultrasound images to be fused for correlation of differences between these modalities. This fusion technology may allow differences between the imaging techniques to be resolved during the real-time ultrasound evaluation.