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Augmented Reality Visualization for CT-guided Interventions: System Description, Feasibility, and Initial Evaluation in an Abdominal Phantom¹

¹ From the Dept of Radiology (M.D., U.J.S., E.v.S., S.G.S.) and Surgical Planning Laboratory (R.K.), Brigham and Women's Hosp, Harvard Medical School, Boston, Mass; Inst of Diagnostic and Interventional Radiology, Muelheim Radiology Inst, Univ of Witten Herdecke, Muelheim, Germany (M.D.); Dept of Diagnostic Radiology, RWTH Aachen, Aachen, Germany (M.D.); Siemens Corporate Research, Princeton, NJ (F.S., A.K., S.K.V.); Dept of Radiology, Medical Univ of South Carolina, 169 Ashley Ave, Charleston, SC 29425 (U.J.S.); CT Division, Siemens Medical Solutions, Forchheim, Germany (S.S.); and Dept of Radiology, Dana-Farber Cancer Inst, Harvard Medical School, Boston, Mass (E.v.S.). From the 2002 RSNA Annual Meeting. Received January 5, 2004; revision requested March 4; revision received April 30, 2005; accepted June 30; final version accepted September 6. Supported by an unrestricted research grant provided by Siemens Corporate Research, Princeton, NJ. M.D. is supported by the Medical Image Processing Laboratory, Muelheim/Ruhr, Germany. U.J.S. is a medical consultant to Siemens Medical Solutions. Address correspondence to U.J.S. (e-mail: schoepf{at}musc.edu).

The purpose of this study was to evaluate the feasibility and performance of an augmented reality (AR) visualization prototype for virtual computed tomography (CT)-guided interventional procedures in a multimodality abdominal phantom. With the aid of AR guidance, three radiologists performed 30 attempts at targeting simulated liver lesions of different sizes (range, 5–15 mm) with a biopsy needle. The position of the needle tip relative to the lesion was verified by using ultrasonography and CT. With AR guidance, lesions were successfully targeted with the first needle pass in all cases. On the basis of these results, AR visualization for CT-guided intervention appears feasible and allows intuitive and accurate lesion targeting in a phantom.

Supplemental material: radiology.rsnajnls.org/cgi/content/full/2401040018/DC1

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