A simple method for evaluation of half-value layer variation in CT equipment.

Area of Science:

• Medical Physics
• Radiological Physics

Background:

• Accurate half-value layer (HVL) determination is crucial for quality control in diagnostic radiology, especially in computed tomography (CT) where it is challenging.
• Conventional HVL measurement methods can be complex and time-consuming.

Purpose of the Study:

• To develop and test novel tandem systems for HVL determination in CT radiation beams.
• To evaluate the feasibility of using these systems to confirm existing HVL values.
• To assess the advantages of the new system for routine quality control.

Main Methods:

• Development of tandem systems comprising a pencil ionization chamber with and without a specific covering.
• Testing of these systems in standard radiation beams, simulating CT conditions.
• Comparison of HVL values obtained from the tandem system with those from conventional methods.

Main Results:

• The tandem systems demonstrated the ability to confirm HVL values determined by conventional methods in diagnostic radiology.
• The systems proved effective in computed tomography radiation beams.
• The behavior of the tandem systems in diagnostic radiology confirmed their utility.

Conclusions:

• Tandem ionization chamber systems provide a viable and effective method for confirming HVL values in CT quality control.
• These systems offer practical advantages including low cost, ease of use, and rapid measurement procedures.
• The developed tandem systems can enhance the efficiency and reliability of quality control programs in diagnostic imaging.