[Image Quality Assessment of Non-contrast Brain Computed Tomography Using High-pitch Double Spiral Scan: A Basic...

Area of Science:

• Radiology and Imaging Science
• Medical Physics
• Neuroimaging

Context:

• Acute intracerebral hemorrhage (ICH) diagnosis is challenged by motion artifacts in computed tomography (CT).
• High-speed imaging techniques are being developed to mitigate motion-related degradation in neuroimaging.
• Validating new CT technologies is crucial for clinical adoption in emergency settings.

Purpose:

• To validate the image quality of Flash spiral (FS) high-speed CT imaging for non-contrast brain scans.
• To compare the CT values, noise power spectrum (NPS), task transfer function (TTF), and system performance function (SPF) between FS and reference CT scans using a phantom.
• To assess the potential of FS technology in improving the detection of acute intracerebral hemorrhage in patients experiencing motion.

Summary:

• Phantom experiments showed no significant differences in CT values for simulated hematoma and surrounding tissues between reference and FS images.
• Noise power spectrum analysis indicated lower noise in FS images at higher spatial frequencies, with comparable peak frequencies.
• Task transfer function (10% TTF) and system performance function (SPF) values were equivalent between reference and FS scans, suggesting similar spatial resolution.

Impact:

• Flash spiral (FS) CT imaging demonstrates comparable resolution to standard CT, particularly in the high spatial frequency domain.
• The comparable image quality suggests FS technology can maintain diagnostic accuracy for detecting intracerebral hemorrhage.
• FS technology holds promise for enhancing the diagnostic utility of CT in patients with acute intracerebral hemorrhage who exhibit significant motion, a common challenge in clinical practice.