Self-Shielding Analysis of the Zap-X System

Area of Science:

• Medical Physics
• Radiation Oncology
• Radiological Engineering

Background:

• Stereotactic radiosurgery (SRS) for brain and head/neck tumors traditionally requires radiation bunkers.
• The Zap-X system is a novel, self-contained, self-shielded device for SRS.
• Existing SRS facilities incur significant costs for bunker construction and maintenance.

Purpose of the Study:

• To evaluate the radiation shielding effectiveness of the Zap-X system.
• To determine if the Zap-X can achieve public safety radiation exposure levels under a full clinical workload.
• To assess the cost-saving potential by eliminating the need for radiation bunkers.

Main Methods:

• Analysis of Zap-X system's integrated radiation shielding.
• Measurement of radiation leakage during simulated clinical operation.
• Comparison of measured leakage to Nuclear Regulatory Commission (NRC) occupational limits.

Main Results:

• The Zap-X system's overall radiation leakage is reduced by a factor of 50 compared to NRC occupational limits.
• Self-shielding is effective under typical clinical workloads.
• The device significantly reduces the risk of radiation exposure to workers and the public.

Conclusions:

• The Zap-X system successfully achieves self-shielding, meeting safety standards for public exposure.
• The elimination of radiation bunkers offers substantial cost savings for SRS facilities.
• Further shielding or restricted areas may be needed only in exceptional circumstances.