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[Megavoltage cone-beam CT: Recent developments and clinical applications]
1Department of radiation oncology, university of California San Francisco, comprehensive cancer center, 1600 Divisadero street, Suite H1031, San Francisco, CA-94143, USA. pouliot@radonc17.ucsf.edu
Summary
This study introduces a novel Megavoltage cone-beam (MV CBCT) system for precise image-guided radiation therapy. The system enables rapid 3D imaging, patient alignment verification, and anatomical change detection before treatment delivery.
Area of Science:
- Medical Physics
- Radiotherapy Technology
- Diagnostic Imaging
Context:
- Advanced imaging is crucial for accurate radiation delivery.
- Megavoltage cone-beam computed tomography (MV CBCT) offers potential for real-time imaging during treatment.
- Integrating imaging and treatment planning workflows enhances precision.
Purpose:
- To present the advantages and performance of a new a-Si flat panel-based MV CBCT system.
- To summarize the integrated workflow for automatic image acquisition, reconstruction, and registration.
- To highlight clinical applications and demonstrate image-guided treatment processes.
Summary:
- The MV CBCT system utilizes a new a-Si flat panel for MV imaging and an integrated workflow.
- It enables automatic projection acquisition, cone-beam CT reconstruction, CT to CBCT registration, and couch adjustment.
- This provides a 3D anatomy volume in the treatment position for verification and correction before dose delivery.
Impact:
- Facilitates precise patient positioning and verification before radiation delivery.
- Enables detection of anatomical changes and supports adaptive radiotherapy.
- Demonstrates successful clinical applications in treating spinal, lung, head and neck, and prostate cancers.