Articles: surgery.
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IEEE Trans Ultrason Ferroelectr Freq Control · Feb 2007
Finite element analysis of tissue deformation with a radiofrequency ablation electrode for strain imaging.
Recent studies have shown that radiofrequency (RF) electrode displacement or deformation-based strain imaging can be used as an alternate imaging modality to monitor and to evaluate ablative therapies for liver tumors. This paper describes a biomechanical model used to study RF electrode deformation-based strain imaging, in conjunction with a simulated medical ultrasound linear array transducer. The computer simulations reported here are important steps toward understanding this biomechanical system in vivo, thus providing a basis for improving system design, including the motion tracking algorithm and image guidance for performing RF electrode displacement-strain imaging in vivo.
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To evaluate the accuracy of a novel bone-mounted miniature robotic system for percutaneous placement of pedicle and translaminar facet screws. ⋯ These results verify the system's accuracy and support its use for minimally invasive spine surgery in selected patients.
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AJR Am J Roentgenol · Feb 2007
Clinical TrialCT-guided iliosacral screw placement: technique and clinical experience.
The purpose of this study was to describe the technique of and experience in using CT guidance for percutaneous iliosacral screw placement in patients with unstable pelvic fractures. ⋯ CT-guided iliosacral screw placement is a safe and accurate procedure that can be performed by radiologists in a radiology suite.