| Overview

What could you do with five minutes time savings per patient, per day? C-RAD Sentinel is an advanced laser/camera based system that helps you more accurately set up the patient in less time, and track patient motion during treatment. The C-RAD Sentinel basic platform is based on advanced laser technology with multi-purpose software modules covering different tasks in the treatment procedure. The different software modules are seamlessly integrated with other systems in the clinic. C-RAD Sentinel is designed to provide a high level of ease of use combined with improved accuracy.

By advanced surface registration algorithms the actual patient position is compared to a predefined reference position/image. With a click of a button the results are obtained and the need for manual markings on the patient and for manual handling to bring the patient into the defined position is eliminated. With interface to major accelerator vendors the suggested patient position is transferred to the respective couch control system and fast and accurate alignment is achieved.

During the treatment delivery phase it is critical that the patient does not change position and that the treatment is delivered in accordance with the plan. cMotion monitors the movement of the patient during treatment delivery and automatically warns if the patient moves outside the allowed tolerances. This eliminates the need for visual monitoring by the staff, adding convenience as well as safety.

• Connectivity - Seamless integration with other systems in the RT clinic
• Accuracy - High level of accuracy based on state-of-the-art laser technology
• Ease of Use - No need for manual marking or maneuvering of the patient enables timesaving in the patient positioning procedure and increases patient throughput
• Confidence - The system confirms correct positioning and monitors movement

C-RAD Sentinel hardware consists of a single scanner unit containing the laser and camera, mounted in the ceiling in front of the gantry. The scanner is connected to the PC running the c4D software. During patient surface acquisition, a laser line is swept along the patient while the camera records a number of images. From the data acquired, a complete 3D surface of the patient can be reconstructed using laser line triangulation.

For patient positioning, the acquired surface is captured in a few seconds and can contain several hundred contours. For motion detection, the number of contours is typically lowered so that the desired frame rate is achieved. The system is capable of acquiring more than 50 contours per second.

Advances in IMRT, IGRT, and other treatment delivery protocols have enabled greater levels of accuracy and dose. But these advancements have also created the demand for higher accuracy in monitoring the patient position and movements.

The Sentinel system does not require any markers to be placed on the patient or the couch, and doesn’t subject the patient to any additional radiation. This also means that the personnel can stay in the treatment room during the whole set up procedure.