Accuracy Study of a Robotic System for MRI-guided Prostate Needle Placement
Identifieur interne : 002591 ( Main/Exploration ); précédent : 002590; suivant : 002592Accuracy Study of a Robotic System for MRI-guided Prostate Needle Placement
Auteurs : Reza Seifabadi [Canada] ; Nathan Bj. Cho [États-Unis] ; Sang-Eun Song [États-Unis] ; Junichi Tokuda [États-Unis] ; Nobuhiko Hata [États-Unis] ; Clare M. Tempany [États-Unis] ; Gabor Fichtinger [Canada] ; Iulian Iordachita [États-Unis]Source :
- The international journal of medical robotics + computer assisted surgery : MRCAS [ 1478-5951 ] ; 2012.
Abstract
Accurate needle placement is the first concern in percutaneous MRI-guided prostate interventions. In this phantom study, different sources contributing to the overall needle placement error of a MRI-guided robot for prostate biopsy have been identified, quantified, and minimized to the possible extent.
The overall needle placement error of the system was evaluated in a prostate phantom. This error was broken into two parts: the error associated with the robotic system (called before-insertion error) and the error associated with needle-tissue interaction (called due-to-insertion error). The
The average overall system error in phantom study was 2.5 mm (STD=1.1mm). The average robotic system error in super soft phantom was 1.3 mm (STD=0.7 mm). Assuming orthogonal error components, the needle-tissue interaction error was approximated to be 2.13 mm thus having larger contribution to the overall error. The average susceptibility artifact shift was 0.2 mm. The manipulator’s targeting accuracy was 0.71 mm (STD=0.21mm) after robot calibration. The robot’s repeatability was 0.13 mm. Sterilization had no noticeable influence on the robot’s accuracy and repeatability.
The experimental methodology presented in this paper may help researchers to identify, quantify, and minimize different sources contributing into the overall needle placement error of an MRI-guided robotic system for prostate needle placement. In the robotic system analyzed here, the overall error of the studied system remained within the acceptable range.
Url:
DOI: 10.1002/rcs.1440
PubMed: 22678990
PubMed Central: 3772968
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en"><sec id="S1"><title>Background</title>
<p id="P1">Accurate needle placement is the first concern in percutaneous MRI-guided prostate interventions. In this phantom study, different sources contributing to the overall needle placement error of a MRI-guided robot for prostate biopsy have been identified, quantified, and minimized to the possible extent.</p>
</sec>
<sec id="S2"><title>Methods and Materials</title>
<p id="P2">The overall needle placement error of the system was evaluated in a prostate phantom. This error was broken into two parts: the error associated with the robotic system (called before-insertion error) and the error associated with needle-tissue interaction (called due-to-insertion error). The <italic>before-insertion error</italic>
was measured directly in a soft phantom and different sources contributing into this part were identified and quantified. A calibration methodology was developed to minimize the 4-DOF manipulator’s error. The <italic>due-to-insertion error</italic>
was indirectly approximated by comparing the overall error and the before-insertion error. The effect of sterilization on the manipulator’s accuracy and repeatability was also studied.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P3">The average overall system error in phantom study was 2.5 mm (STD=1.1mm). The average robotic system error in super soft phantom was 1.3 mm (STD=0.7 mm). Assuming orthogonal error components, the needle-tissue interaction error was approximated to be 2.13 mm thus having larger contribution to the overall error. The average susceptibility artifact shift was 0.2 mm. The manipulator’s targeting accuracy was 0.71 mm (STD=0.21mm) after robot calibration. The robot’s repeatability was 0.13 mm. Sterilization had no noticeable influence on the robot’s accuracy and repeatability.</p>
</sec>
<sec id="S4"><title>Conclusions</title>
<p id="P4">The experimental methodology presented in this paper may help researchers to identify, quantify, and minimize different sources contributing into the overall needle placement error of an MRI-guided robotic system for prostate needle placement. In the robotic system analyzed here, the overall error of the studied system remained within the acceptable range.</p>
</sec>
</div>
</front>
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<name sortKey="Fichtinger, Gabor" sort="Fichtinger, Gabor" uniqKey="Fichtinger G" first="Gabor" last="Fichtinger">Gabor Fichtinger</name>
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<country name="États-Unis"><region name="Maryland"><name sortKey="Cho, Nathan Bj" sort="Cho, Nathan Bj" uniqKey="Cho N" first="Nathan Bj." last="Cho">Nathan Bj. Cho</name>
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<name sortKey="Hata, Nobuhiko" sort="Hata, Nobuhiko" uniqKey="Hata N" first="Nobuhiko" last="Hata">Nobuhiko Hata</name>
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<name sortKey="Song, Sang Eun" sort="Song, Sang Eun" uniqKey="Song S" first="Sang-Eun" last="Song">Sang-Eun Song</name>
<name sortKey="Tempany, Clare M" sort="Tempany, Clare M" uniqKey="Tempany C" first="Clare M." last="Tempany">Clare M. Tempany</name>
<name sortKey="Tokuda, Junichi" sort="Tokuda, Junichi" uniqKey="Tokuda J" first="Junichi" last="Tokuda">Junichi Tokuda</name>
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