On-line adaptive radiation therapy: feasibility and clinical study

Area of Science:

• Radiation Oncology
• Medical Physics
• Oncology

Background:

• Prostate cancer treatment relies on precise radiation delivery.
• Adaptive Radiation Therapy (ART) aims to improve plan accuracy by adjusting to daily anatomical changes.
• Current ART implementation faces challenges in speed and efficiency.

Purpose of the Study:

• To evaluate the feasibility of an online Adaptive Radiation Therapy (ART) system for prostate cancer.
• To assess the clinical dosimetric benefit of daily cone-beam CT imaging and fast volumetric reoptimization.
• To design and evaluate a clinical implementation scheme for ART.

Main Methods:

• Implementation and evaluation of a fast intensity-modulated radiotherapy (IMRT) plan reoptimization algorithm.
• Comparison of adapted plans with new plans from commercial systems and in-house DVH estimation tools.
• Assessment of a clinical implementation scheme for ART using clinical cases.

Main Results:

• The developed fast reoptimization algorithm shows promise for online ART.
• Adapted plans demonstrated potential dosimetric benefits compared to standard plans.
• The clinical implementation scheme was evaluated for dosimetric qualities and efficiency.

Conclusions:

• Online ART based on daily CBCT and fast reoptimization is feasible for prostate cancer.
• This approach offers potential for improved dosimetric outcomes in radiation therapy.
• Further clinical validation is warranted to optimize ART implementation.