C-Arm vs O-Arm: Which Intraoperative Imaging Fits Your OR?

What each system is

A standard mobile C-arm provides 2D fluoroscopy and radiography. A 3D C-arm is a C-arm that rotates around the patient to acquire a series of projections and reconstructs them into slices and 3D views. The term O-arm refers to a ring-shaped intraoperative imaging system that closes into a full circle around the patient to acquire a cone-beam CT-like volume; it is a trade name used generically by many surgeons.

The main difference in concept is the gantry. The C is open and mobile; the ring is closed during scanning, usually larger and more specialised. Both aim to confirm implant position before the patient leaves the OR.

Image and workflow

A 2D C-arm is quick and simple for projections, but it shows overlapping structures. A 3D C-arm produces transverse, sagittal and coronal views and can resolve questions such as whether a pedicle screw lies within the pedicle. A ring-type system typically scans a defined volume in a single rotation.

The PLX C7600 is an intraoperative 3D C-arm: it gives transverse, sagittal and coronal images and 3D views, its 3D field covers all lumbar or cervical vertebrae, 3D acquisition takes 30 seconds and reconstruction 8 seconds, and three-way lasers and position memory help repeatability. The surgeon can check implant position before leaving the OR.

Navigation and robotics

Intraoperative 3D images are also the basis of navigation and robot-assisted surgery. The PL300B is a robot-assisted spine surgical navigation system that pairs Perlove's intraoperative 3D C-arm with optical tracking and a six-direction robotic arm. It supports automatic image registration, pre-operative screw trajectory planning on intraoperative 3D images and multi-level vertebral planning.

If navigation is on your roadmap, ask every supplier which imaging devices their navigation system works with and whether it is a closed or open ecosystem.

• Check compatibility of imaging with navigation
• Ask about registration method and accuracy documentation
• Include training for the whole team

Space, set-up and room needs

A C-arm, 2D or 3D, rolls through standard doors and parks against the wall. A ring-type system is bulkier, needs more floor and a defined parking place, and may need a dedicated table. The PLX C7600 offers 94 cm of free space in the C opening. Check the width of your doors, the lifts, and the room layout before you fix on any system.

Radiation protection in 3D acquisition differs from fluoroscopy: staff normally leave the room or stand behind shielding during the scan. Agree a protocol with the radiation safety officer. See C-arm radiation safety for the basics.

Cost drivers and decision

Costs depend on the system class, software, navigation, service and training. A standard C-arm is the lowest-cost route; a 3D C-arm costs more; ring-type systems and navigation add further. We do not quote prices, and you should request written, itemised quotes on equal scope. For a first orientation read C-arm machine price.

Match the system to your volume. A spine centre with many complex cases may justify 3D and navigation; a general trauma theatre may be well served by a quality 2D flat-panel C-arm. Read 3D C-arm intraoperative imaging for more.

Questions for suppliers

Ask about field of view, scan time, dose per scan, reconstruction time, DICOM export, compatibility with navigation and robotic systems, upgrades and local service. Request a demonstration with your team. Confirm device registration and facility licensing (MOHAP, DHA or DOH, depending on the emirate).

For help comparing options, request a consultation from Beckfinity's specialists via the contact page.