Reduction of aneurysm clip artifacts on CT angiograms: a technical note.

Area of Science:

• Medical Imaging
• Radiology
• Neuroimaging

Background:

• Beam-hardening artifacts are a common problem in CT angiography, particularly in patients with aneurysm clips.
• These artifacts can obscure critical anatomy, potentially impacting diagnostic accuracy.
• Existing methods for artifact reduction may require protocol changes or are not universally applicable.

Purpose of the Study:

• To introduce and evaluate a simple head tilt technique for CT angiography.
• To demonstrate the effectiveness of this maneuver in reducing beam-hardening artifacts.
• To assess the impact of the technique on diagnostic accuracy in patients with aneurysm clips.

Main Methods:

• A novel head tilt technique was applied during CT angiography acquisition.
• The technique involves adjusting the patient's head position to redirect artifacts.
• The maneuver was evaluated in patients with intracranial aneurysm clips.

Main Results:

• The head tilt technique successfully directed beam-hardening artifacts away from relevant anatomical structures.
• No significant changes to the standard CT angiographic protocol were necessary.
• The maneuver was easily integrated and showed potential for combined use with other artifact reduction strategies.

Conclusions:

• Head tilt is a simple, effective technique for minimizing beam-hardening artifacts in CT angiography.
• This maneuver enhances diagnostic confidence by improving visualization of pertinent anatomy.
• The technique offers a practical solution for artifact management in patients with aneurysm clips.