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High-Definition Zoom Mode, a High-Resolution X-Ray Microscope for Neurointerventional Treatment Procedures: A

S V Setlur Nagesh1,2, V Fennel3,2, J Krebs4

  • 1From the Canon (formerly Toshiba) Stroke and Vascular Research Center (S.V.S.N., J.K., C.I., D.R.B., A.H.S., S.R.) ss438@buffalo.edu.

AJNR. American Journal of Neuroradiology
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High-definition mode imaging significantly improves visualization of neurointerventional devices compared to flat panel detector imaging. This enhanced clarity in neurointerventional procedures offers potential safety and efficacy benefits.

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Area of Science:

  • Medical Imaging
  • Neurosurgery
  • Endovascular Interventions

Background:

  • Visualization quality of treatment devices is crucial for endovascular intervention safety and efficacy.
  • New-generation X-ray detector systems offer different pixel resolutions for image acquisition.

Purpose of the Study:

  • To compare image visualization of neurointerventional procedures and devices between a 194-μm pixel flat panel detector (FPD) and a 76-μm pixel complementary metal oxide semiconductor (CMOS) detector (high-definition mode).

Main Methods:

  • A neurointerventional phantom simulating intracranial vasculature and an internal carotid artery aneurysm was used.
  • Two blinded neurointerventionalists evaluated image pairs from FPD and high-definition (HD) modes during flow-diverter deployment.
  • Raters assessed image quality based on anatomy, noise, and device visualization, rating preferences and inter/intrarater agreement.

Main Results:

  • Both raters showed good agreement and preferred HD images in at least 95% of cases.
  • HD images were rated as 'much better' than FPD images by 73% of evaluations.
  • HD mode provided sharper images with less noise compared to FPD.

Conclusions:

  • Higher resolution of HD mode results in sharper, visually preferred images over FPD.
  • Improved imaging quality from HD mode offers potential advantages in neurointerventional procedures.