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Abstract
Introduction/Purpose Dual energy CT (DECT), or spectral imaging more broadly, is an imaging technique utilized for material decomposition, image optimization, and artifact reduction. Applications in neurointerventional surgery are broad with the most common application being distinguishing blood product from contrast staining in the post-thrombectomy patient. In this presentation, we provide a clear framework for interpretation of DECT with emphasis on the applications, pearls, and pitfalls of this modality within the context of neurointerventional surgery.
Materials and Methods Patients who underwent thrombectomy and post procedural DECT or photon counting CT were selected for analysis within our institution. DECT was performed with Siemen’s Force scanner and photon counting scanner was performed with a Siemen’s NAEOTOM Alpha scanner. Post processing was performed utilizing Siemen’s SyngoVia software package.
Results/Conclusion A framework for interpreting spectral/DECT was successfully developed. Three common artifacts were identified: spectral overlap, saturation, and beam hardening artifact which could contribute to interpretation error. Additional applications of DECT include bone subtraction for time efficient 3D vascular reformatting, distinguishing calcified embolus and atherosclerosis from patent vessel, increased sensitivity for active extravasation, distal vessel occlusions, and arterial dissection were described.
Disclosures Z. Nigogosyan: None. R. Chatterjee: None.