Motion management in gastrointestinal cancers.

Area of Science:

• Radiation oncology
• Gastrointestinal oncology
• Medical physics

Background:

• Tumor and organ motion significantly complicates radiotherapy for gastrointestinal cancers.
• Inadequate motion management can lead to under-dosing of tumors and over-dosing of nearby organs at risk (OARs).
• The close proximity of abdominal tumors to OARs heightens the risks associated with motion.

Purpose of the Study:

• To present a comprehensive review of current strategies for managing tumor and organ motion in gastrointestinal cancer radiotherapy.
• To detail techniques for evaluating and quantifying these motions.
• To discuss methods for the effective management of motion during treatment planning and delivery.

Main Methods:

• Literature review of techniques for motion evaluation, quantification, and management.
• Analysis of strategies applied in radiotherapy for gastrointestinal malignancies.
• Synthesis of information on overcoming motion-related challenges in radiation oncology.

Main Results:

• Various techniques exist for assessing and quantifying tumor and organ motion during radiotherapy.
• Strategies include internal target volume (ITV) margins, breath-hold techniques, gating, and real-time tumor tracking.
• Effective motion management is crucial for dose escalation and minimizing toxicity.

Conclusions:

• Accurate evaluation and management of tumor and organ motion are essential for successful radiotherapy of gastrointestinal cancers.
• A combination of techniques may be required depending on the specific clinical scenario.
• Continued research and technological advancements are vital for further improving motion management strategies.