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Updated: Jan 16, 2026

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Head Implants for the Neuroimaging of Awake, Head-Fixed Rats
Published on: September 7, 2022
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Radiolucent head immobilization during neurointerventional procedures: A pilot study from a single-institution
Nicholas G Lam1, Je Y Sone2, William J Ankenbrandt3
1Northwestern University, Evanston, IL, USA.
Summary
Radiolucent head immobilization (RHI) devices significantly reduce fluoroscopy time for cerebral digital subtraction angiography and bilateral middle meningeal artery embolization. RHI enhances procedural efficiency without compromising angiographic image quality or increasing radiation exposure.
Area of Science:
- Neurosurgery
- Interventional Radiology
- Medical Device Technology
Background:
- Radiolucent head immobilization (RHI) devices are novel tools in neurovascular procedures.
- Limited data currently supports the efficacy of RHI in clinical practice.
- Assessing RHI's impact on procedural efficiency and safety is crucial.
Purpose of the Study:
- To evaluate the benefits of using Radiolucent Head Immobilization (RHI) devices.
- To test the hypothesis that RHI improves procedural efficiency.
- To determine if RHI affects angiographic image quality or radiation exposure.
Main Methods:
- Retrospective cohort study of patients undergoing cerebral digital subtraction angiography (DSA) or middle meningeal artery embolization (MMAE).
- Analysis of fluoroscopy time, image quality, and radiation dosage comparing RHI users and non-users.
- Blinded review of DSA images for quality and artifact assessment.
Main Results:
- Significantly reduced fluoroscopy times were observed for DSA and bilateral MMAE procedures with RHI.
- No significant difference in fluoroscopy time for unilateral MMAE procedures.
- No significant differences in total radiation dose or image quality were found between groups.
Conclusions:
- RHI devices are associated with decreased fluoroscopy times for specific neurovascular procedures.
- RHI use does not compromise diagnostic image quality or increase radiation dose.
- RHI may enhance efficiency in lengthy neurovascular procedures performed under conscious sedation.

