Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4964709 | Computerized Medical Imaging and Graphics | 2017 | 22 Pages |
Abstract
This work presents development of an integrated ultrasound (US)-cone-beam CT (CBCT) system for image-guided needle interventions, combining a low-cost ultrasound system (Interson VC 7.5Â MHz, Pleasanton, CA) with a mobile C-arm for fluoroscopy and CBCT via use of a surgical tracker. Imaging performance of the ultrasound system was characterized in terms of depth-dependent contrast-to-noise ratio (CNR) and spatial resolution. US-CBCT system was evaluated in phantom studies simulating three needle-based procedures: drug delivery, tumor ablation, and lumbar puncture. Low-cost ultrasound provided flexibility but exhibited modest CNR and spatial resolution that is likely limited to fairly superficial applications within a â¼10Â cm depth of view. Needle tip localization demonstrated target registration error 2.1-3.0Â mm using fiducial-based registration.
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Authors
E. Marinetto, A. Uneri, T. De Silva, S. Reaungamornrat, W. Zbijewski, A. Sisniega, S. Vogt, G. Kleinszig, J. Pascau, J.H. Siewerdsen,