Program Information
Real Time Resolution Enhanced and Dose-Reduced Display for Neuro-Interventional Procedures
S Setlur Nagesh*, C Ionita , D Bednarek , S Rudin , Toshiba Stroke and Vascular Research Center, SUNY Buffalo, Buffalo, NY
Presentations
WE-AB-601-10 (Wednesday, August 2, 2017) 7:30 AM - 9:30 AM Room: 601
Purpose: A novel imaging technique enhancing the visualization of treatment devices such as stents and coils at lower integral dose to the patient during a neuro-intervention is presented.
Methods: A neuro-interventional treatment of an aneurysm using a pipeline embolization device (PED) was simulated on a patient-specific 3D printed invitro model. A High Resolution Fluoroscope (HRF) with a pixel size of 75 μm was used to acquire images with a 7.5 cm x 6.5 cm field-of-view (FOV) at the detector entrance. A 0.7 mm thick differential copper attenuator with a 10 mm diameter circular opening for the Region of Interest (ROI) was used to reduce the entrance skin dose in the periphery. The ROI was aligned to the PED deployment area. Two displays were provided: one, the entire FOV with brightness-difference corrected and noise reduced by temporal recursion filtering in the dose attenuated periphery region and second, an enhanced image of regular dose in the ROI treatment area, resampled to a pixel size of 35μm using bilinear interpolation.
Results: By using the ROI attenuator, a 56% reduction in the entrance air kerma-area-product per frame was achieved. After applying the image interpolation in the ROI treatment area, a magnification factor of two was achieved within the ROI, improving the visibility of the PED.
Conclusion: The large FOV image provides real-time visualization of the ROI treatment area as well as the periphery. The dose to the patient can be reduced by using the ROI attenuator, while maintaining adequate image quality in the periphery area. The magnified display of the ROI intervention area enhances the visualization of the treatment devices, allowing for more accurate interventional treatment.
Funding Support, Disclosures, and Conflict of Interest: Partial funding from Toshiba Medical Systems Corporation.
Contact Email: