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Toronto, Canada

Krieger A.,Johns Hopkins University | Krieger A.,Sentinelle Medical Inc. | Song S.-E.,Johns Hopkins University | Bongjoon Cho N.,Johns Hopkins University | And 5 more authors.
IEEE/ASME Transactions on Mechatronics | Year: 2013

This paper reports the design, development, and magnetic resonance imaging (MRI) compatibility evaluation of an actuated transrectal prostate robot for MRI-guided needle intervention in the prostate. The robot performs actuated needle MRI guidance with the goals of providing ;1) MRI compatibility; 2) MRI-guided needle placement with accuracy sufficient for targeting clinically significant prostate cancer foci; 3) reducing interventional procedure times (thus increasing patient comfort and reducing opportunity for needle targeting error due to patient motion); 4) enabling real-time MRI monitoring of interventional procedures; and 5) reducing the opportunities for error that arise in manually actuated needle placement. The design of the robot, employing piezoceramic-motor actuated needle guide positioning and manual needle insertion, is reported. Results of an MRI compatibility study show no reduction of MRI signal-to-noise ratio (SNR) with the disabled motors. Enabling the motors reduces the SNR by 80% without radio frequency (RF) shielding, but the SNR is only reduced by 40-60% with RF shielding. The addition of RF shielding is shown to significantly reduce image SNR degradation caused by the presence of the robotic device. An accuracy study of MRI-guided biopsy needle placements in a prostate phantom is reported. The study shows an average in-plane targeting error of 2.4 mm with a maximum error of 3.7 mm. These data indicate that the systems needle targeting accuracy is similar to that obtained with a previously reported manually actuated system, and is sufficient to reliably sample clinically significant prostate cancer foci under MRI guidance. © 1996-2012 IEEE. Source


Krieger A.,Sentinelle Medical Inc. | Iordachita I.,Johns Hopkins University | Song S.-E.,Johns Hopkins University | Cho N.B.,Johns Hopkins University | And 3 more authors.
Proceedings - IEEE International Conference on Robotics and Automation | Year: 2010

This paper reports the design, development, and magnetic resonance imaging (MRI) compatibility evaluation of an actuated transrectal prostate robot for MRI-guided intervention. The robot employs an actuated needle guide with the goal of reducing interventional procedure times and increasing needle placement accuracy. The design of the robot, employing piezo-ceramic-motor actuated needle guide positioning and manual needle insertion, is reported. Results of a MRI compatibility study show no reduction of MRI image signal-to-noise-ratio (SNR) with the motors disabled and a 40% to 60% reduction in SNR with the motors enabled. The addition of radio-frequency (RF) shielding is shown to significantly reduce image SNR degradation due to the presence of the robotic device. ©2010 IEEE. Source


Trademark
Hologic and Sentinelle Medical Inc. | Date: 2009-03-17

Medical software for processing and displaying breast images on [ medical ] * magnetic * resonance imaging (MRI) machines. * magnetic resonance imaging * (MRI) * machine * table for breast imaging.


Trademark
Hologic and Sentinelle Medical Inc. | Date: 2008-01-08

Patient examination and/or treatment tables.


Trademark
Hologic and Sentinelle Medical Inc. | Date: 2008-02-12

Patient examination and/or treatment tables.

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