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Official Description

Guidance for localization of target volume for delivery of radiation treatment, includes intrafraction tracking, when performed

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 77387 refers to the guidance for localization of the target volume for the delivery of radiation treatment, which includes the process of intrafraction tracking when performed. This procedure is essential in enhancing the precision of radiation therapy, thereby minimizing potential complications associated with treatment. Real-time image-guided radiotherapy is employed to accurately identify the target area that requires radiation, ensuring that the treatment is delivered precisely where it is needed. Intrafraction tracking is a critical component of this process, as it allows for the continuous adjustment of radiation beams during the actual delivery of treatment. This adjustment is necessary to account for any movement of internal organs that may occur due to various physiological activities such as breathing, cardiac function, bowel movements, swallowing, or even sneezing. To facilitate this advanced technique, electromagnetic transponders are typically implanted around the tumor or target area. These transponders work in conjunction with a specialized 4-dimensional electromagnetic array machine, such as Calypso, RayPilot, or AlignRT, which is positioned above the patient during the treatment session. This setup enables real-time communication between the machine and the transponders, allowing for precise localization and tracking of the target volume throughout the radiation delivery process. The integration of these technologies significantly improves the accuracy of radiation therapy, ultimately leading to better patient outcomes.

© Copyright 2026 Coding Ahead. All rights reserved.

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