ABSTRACT
Interventional CT imaging is used at various stages of the treatment procedures to provide more accurate patient geometry.
10.2 CBCT System Hardware and Data Acquisition e x-ray physics and mathematical reconstruction theories implemented on 3D x-ray tomographic systems for vascular imaging are the same as those on clinical CT scanners. e system geometries, however, are distinct due to dierent design considerations for interventional use. Angiographic interventions require more space beside the patient couch and more exibility in choice of the x-ray projection angle. 3D vascular imaging systems therefore adopt an open-gantry conguration. e x-ray at-panel detector has a large active detection area, and each x-ray projection covers a volume of cone beam on the patient. ese systems are referred to as cone-beam CT (CBCT) systems. Figure 10.2 shows the Artis zeego® robotic platform (Siemens Healthcare, Forchheim, Germany). e system is oen called C-arm CT, since the gantry has a “C” shape. In this section, we provide an overview of C-arm CBCT with a focus on its main dierences from clinical CT scanners used for diagnosis. Several commercial vendors oer C-arm CT imaging in the
angiographic suite; this imaging mode is known as DynaCT (Siemens AG), Innova CT (GE Healthcare), XperCT (Philips Healthcare), and 3D-LCI (Toshiba Medical Systems). All of these implementations have similar system geometries and data acquisition approaches.
