Dedicated mobile volumetric cone-beam computed tomography for human brain imaging: A phantom study.

Area of Science:

• Medical Imaging
• Radiology
• Biomedical Engineering

Background:

• Mobile cone-beam CT (CBCT) is gaining clinical use but faces limitations in brain imaging due to scan time and image quality.
• Existing mobile CBCT systems are not optimized for the specific demands of neurological imaging.

Purpose of the Study:

• To develop a dedicated mobile volumetric CBCT system for brain imaging.
• To optimize the imaging protocol for mobile CBCT brain scans using a phantom study.

Main Methods:

• Evaluation of a mobile volumetric CBCT system for scan time and image quality metrics (SNR, CNR, spatial resolution).
• Assessment of effective radiation dose and image quality using a brain CT phantom.
• Optimization of imaging parameters including x-ray voltage and current.

Main Results:

• Achieved a scan time of 5.14 seconds with 360 projection views.
• Measured signal-to-noise ratio (SNR) of 5.67 and contrast-to-noise ratio (CNR) of 14.5 at 120 kV/10 mA.
• Obtained a spatial resolution of 360 μm (10% MTF) and an effective dose of 0.92 mSv, with clear visualization of intracranial structures.

Conclusions:

• The developed mobile volumetric CBCT system can produce high-quality human brain images.
• Optimal imaging conditions allow for fast scan times and low radiation doses.
• Reproducible image quality is achievable for neurological imaging applications.