The mobile C-arm is an X-ray system that can be used during orthopedic treatments and minimally invasive procedures. It provides X-ray images in real time and allows the treating physician to monitor anatomical structures as well as the position of instruments or injection needles during the procedure.
At the ROC in Aschheim near Munich, we use the mobile C-arm primarily for specific procedures on the spine and joints.

The device's name comes from its C-shaped design. The X-ray source is located at one end, and the image detector at the other. The arc can be moved around the area of the body being examined, allowing X-ray images to be taken from different angles.
The images are displayed directly on a screen. This allows the position of anatomical structures, an injection needle, or a medical instrument to be checked during the procedure and adjusted as needed.
The mobile C-arm is not primarily used for standalone diagnostic examinations. It is mainly used for imaging monitoring during certain treatments.
Possible applications include:
Whether treatment under C-arm fluoroscopy is appropriate depends on the affected body region, the clinical issue, and the planned procedure.
In cases of spinal infiltrations, nerve roots, vertebral joints, and other sensitive structures are located in close proximity to one another. The mobile C-arm can help visualize the relevant bony landmarks and monitor the position of the injection needle during treatment.
For certain procedures, a contrast agent may also be used. This allows us to monitor how the injected fluid is distributed. Whether a contrast agent is necessary will be determined on a case-by-case basis prior to treatment and discussed with you.
For more information, please visit our pages on infiltration therapies and the Racz catheter.
Before the procedure, we will discuss the process, the planned treatment, and any potential risks with you. Any existing images and test results will be taken into account in the planning.
During the procedure, you will lie on a special examination table. The C-arm will be positioned over the relevant area of the body. Depending on the procedure, individual X-rays or short fluoroscopy sequences will be taken.
The treating physician views the images directly on a monitor and can monitor the position of the needle or instrument. Once the procedure is complete, the treated area is dressed, and further instructions are discussed with you.
X-ray guidance can provide precise orientation during certain procedures. Potential benefits include:
However, the C-arm does not replace the preliminary diagnostic workup. Depending on the clinical question, a physical examination as well as MRI, X-ray, CT, or ultrasound imaging may be required beforehand.
Because the mobile C-arm uses X-rays, it is used only when imaging is medically necessary for the planned procedure.
Radiation exposure depends, among other factors, on the area of the body being treated, the duration of the fluoroscopy, and the number of images required. By using short image sequences, pulsed fluoroscopy, and carefully limiting the area being examined, radiation exposure is kept as low as reasonably achievable for the procedure in question.
Please let us know before treatment if you are pregnant or if pregnancy cannot be ruled out with certainty.
Both the C-arm and ultrasound can be used for image guidance during orthopedic procedures. Which method is more appropriate depends on the target structure and the clinical issue at hand.
Ultrasound is particularly well-suited for visualizing soft tissues, tendons, muscles, fluid collections, and superficial structures. The C-arm is especially effective at visualizing bony landmarks and can therefore be used during certain procedures on the spine or joints.
The choice of procedure is made on a case-by-case basis depending on the planned procedure.
ROC Ortho
Private Orthopedic Practice
St.-Emmeram-Str. 5
85609 Aschheim
Email: praxis@roc-ortho.de
Phone: +49 89 46259930
Opening hours
| Monday | 7:30 a.m. – 6:00 p.m. |
| Tuesday | 7:30 a.m. – 6:00 p.m. |
| Wednesday | 7:30 a.m. – 8:00 p.m. |
| Thursday | 7:30 a.m. – 6:00 p.m. |
| Friday | 7:30 a.m. – 3:00 p.m. |