Image guidance in radiation therapy: techniques and applications.

Area of Science:

• Radiation oncology
• Medical imaging
• Radiotherapy physics

Background:

• Modern radiotherapy prioritizes reducing radiation dose to healthy tissues and improving treatment accuracy.
• Accurate patient positioning and real-time verification are essential to minimize normal tissue toxicity and treatment errors.
• Current image guidance techniques offer improvements but are not without limitations or added costs.

Purpose of the Study:

• To review the concept and importance of image guidance in radiotherapy.
• To discuss currently available image guidance techniques.
• To evaluate the benefits and drawbacks of various image guidance methods.

Main Methods:

• Review of existing literature on image guidance in radiotherapy.
• Analysis of current techniques for position verification and correction.
• Discussion of the clinical implications and limitations of these techniques.

Main Results:

• Image guidance is vital for high-precision radiotherapy, reducing uncertainties associated with setup errors.
• Various image guidance techniques exist, each with specific advantages and disadvantages.
• No single method completely eliminates uncertainties without significant cost implications.

Conclusions:

• Periodic image guidance is indispensable for safe and effective high-precision radiotherapy.
• The selection of image guidance techniques must balance precision, cost, and clinical benefit.
• Further research is needed to overcome the limitations of current image guidance technologies.