[The radiation protective devices for interventional procedures using computed tomography].

Area of Science:

• Medical Physics
• Radiological Sciences
• Radiation Protection

Background:

• Interventional radiology procedures using computed tomography (IVR-CT) pose risks of significant radiation exposure to personnel.
• Scattered radiation and surface dose are primary concerns during these procedures.
• Existing protective measures may be insufficient to mitigate radiation risks effectively.

Purpose of the Study:

• To evaluate scattered and surface radiation doses during IVR-CT procedures.
• To develop and assess the efficacy of novel radiation protection devices for IVR-CT.
• To reduce personnel radiation exposure in IVR-CT settings.

Main Methods:

• Development of two lead vinyl radiation protection devices: a lead curtain and a lead drape.
• Experimental measurements of scattered and surface doses using an abdominal phantom during Cine-CT.
• Utilized an ionization chamber dosimeter to quantify radiation doses with and without the protective devices.
• Measured scattered dose rates at distances of 50-150 cm and surface doses at 4-21 cm from the scanning plane.

Main Results:

• Scattered dose rates at the operator's position ranged from 8.4 to 11.6 micro Gy/sec during CT examination.
• The lead curtain reduced scattered dose rate by 66% at 50 cm, while the lead drape reduced it by 58.3%.
• The lead drape decreased surface dose rate by 60.5% during CT-fluoroscopy (118 micro Gy/sec at 5 cm).

Conclusions:

• Novel radiation protection devices, a lead curtain and drape, effectively reduce scattered and surface radiation doses in IVR-CT.
• These devices offer substantial protection, lowering exposure rates for personnel during procedures like CT-arteriography and CT-fluoroscopy.
• Further development and integration of radiation protection devices are recommended to enhance safety in IVR-CT.