3D-3D Fusion

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The most common fusion is the most often acquired 3D sequence performed on a Siemens machine- the 4 or 5s DSA. In this case the machine automatically fuses elements of the mask (or non-contrast cone beam acquisition) and the subtraction (or post processed arterial only data). However, the workstation also enables fusion of two cone beam CT acquisitions performed separately. Why might you want to do this? We have found many reasons and which are outlined throughout the website. Generally speaking we fuse post contrast to post contrast cone beam CT's to better elucidate the angioarchitecture of dural fistulae or brain AVM and post contrast with pre contrast cone beam acquisitions to better understand the relationship between our implants and the neurovascular disease we are treating. We feel confident that in both cases this changes the way we practice. We should note that in its current form, Siemens biplane systems only allow fusion of two cone beam CT acquisitions.