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- W2109060030 abstract "<b>Purpose:</b> C-arm fluoroscopy is ubiquitous in contemporary surgery, but it lacks the ability to accurately reconstruct 3D information. A major obstacle in fluoroscopic reconstruction is discerning the pose of the X-ray image, in 3D space. Optical/magnetic trackers are prohibitively expensive, intrusive and cumbersome. <b>Method:</b> We present single-image-based fluoroscope tracking (FTRAC) with the use of an external radiographic fiducial consisting of a mathematically optimized set of points, lines, and ellipses. The fiducial encodes six degrees of freedom in a single image by creating a unique view from any direction. A non-linear optimizer can rapidly compute the pose of the fiducial using this image. The current embodiment has salient attributes: small dimensions (3 x 3 x 5 cm), it need not be close to the anatomy of interest and can be segmented automatically. <b>Results:</b> We tested the fiducial and the pose recovery method on synthetic data and also experimentally on a precisely machined mechanical phantom. Pose recovery had an error of <i>0.56 mm</i> in translation and <i>0.33°</i> in orientation. Object reconstruction had a mean error of <i>0.53 mm</i> with <i>0.16 mm</i> STD. <b>Conclusion:</b> The method offers accuracies similar to commercial tracking systems, and is sufficiently robust for intra-operative quantitative C-arm fluoroscopy." @default.
- W2109060030 created "2016-06-24" @default.
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- W2109060030 date "2005-04-12" @default.
- W2109060030 modified "2023-09-27" @default.
- W2109060030 title "A robust fluoroscope tracking (FTRAC) fiducial" @default.
- W2109060030 doi "https://doi.org/10.1117/12.595782" @default.
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