Reconstruction and positional accuracy of 3D ultrasound on vertebral phantoms for adolescent idiopathic scoliosis spinal surgery

Chan, Andrew; Parent, Éric; Lou, Edmond

doi:10.1007/s11548-018-1894-4

Cited by 12 publications

(9 citation statements)

References 43 publications

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“…As to the accuracy of implantation of pedicle screws, the total screw malposition rate was 10.05% in group RA and 13.36% in group FA, nearly approaching signi cant difference between two groups (P=0.054), which suggested that robot-assisted technique seemed hardly to claim signi cantly superior to conventional manipulations in radiological screw insertion accuracy, and the result was similar to studies of Hyun SJ et al's [32] and Park SM et al's [33]. The malposition rate in our study was lower than those of other studies on degenerative disk diseases, which could due to the dysplasia pedicle and vertebrae rotation in AIS patients [32,34,35]. In addition, the recruited patients in studies might also in uence the malposition rate of pedicle screws since each patient might have unique structure of pedicles.…”

Section: Discussionsupporting

confidence: 82%

Comparison of Robot Versus Fluoroscopy-Assisted Pedicle Screw Instrumentation in Adolescent Idiopathic Scoliosis Surgery

Hou

Chen

Yang

et al. 2021

Preprint

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The aim of this study is to explore whether robot-assisted technique has advantages over conventional fluoroscopy-assisted technique in clinical and radiological outcomes and whether it could decrease the incidence of mis-implantations of pedicle screws in AIS correction surgery.A total of 101 AIS patients were recruited (RA group: 45 patients underwent robot-assisted screw insertion; FA group: 56 patients underwent fluoroscopy-assisted screw insertion). When compared the radiological data between two groups, major and secondary curve were both corrected proficiently with no difference in the Cobb angle comparison at last follow-up, suggesting that both robot-assisted technique and fluoroscopy-assisted technique could lead to efficient radiographic correction and similar clinical outcomes (all, P<0.05). In RA group, operation time, blood loss and transfusion volume were significantly greater than those in FA group, while the accuracy of screw implantations in AIS patients with thoracic scoliotic curve in RA group was higher than that in FA group.In conclusion, both robot-assisted and fluoroscopy-assisted technique could reach proficient radiographic correction and similar clinical outcomes in AIS surgery. Compared with conventional fluoroscopy technique, robot-assisted technique might improve the accuracy of screw implantations in AIS patients with thoracic scoliotic curve, while the increased operation time, blood loss and transfusion volume might be the disadvantages due to preliminary stage of learning curve.

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Section: Discussionsupporting

confidence: 82%

Comparison of Robot Versus Fluoroscopy-Assisted Pedicle Screw Instrumentation in Adolescent Idiopathic Scoliosis Surgery

Hou

Chen

Yang

et al. 2021

Preprint

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“…3D freehand US imaging has been proposed to overcome the above limitations [5]. Current 3D US imaging methods can be categorized into three different types: mechanical scanning [6]- [8], 2D array scanning [9]- [11], and freehand scanning [12]- [16]. In mechanical scanning, the US probe is attached to a six degree-of-freedom robotic arm for scanning.…”

Section: B 3d Us Imaging Techniquesmentioning

confidence: 99%

“…Optical tracking systems using spherical markers coated with the infrared light retro-reflective material can achieve up to sub-millimeter tracking accuracy [16], [28]. The cable-free connection between the probe and the external tracking device allows for flexibility for the sonographers.…”

Section: Camera-based Tracking a Principle Of Camera-based Trackingmentioning

confidence: 99%

“…To alleviate the occlusion, a multi-single-lens camera system may be adopted to ensure that the tracking volume is covered by multiple cameras arranged in different locations instead of an integrated camera bar [16]. This solution improves tracking robustness but introduces new challenges with installation, calibration, and cost.…”

Section: B Limitations Of Camera-based Trackingmentioning

confidence: 99%

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Performance Enhanced Ultrasound Probe Tracking With a Hemispherical Marker Rigid Body

Cai

Peng

et al. 2021

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Among tracking techniques applied in the 3D freehand ultrasound, the camera-based tracking method is relatively mature and reliable. However, constrained by manufactured marker rigid bodies, the ultrasound probe is usually limited to operate within a narrow rotational range before occlusion issues affect accurate and robust tracking performance. Thus, this study proposed a hemispherical marker rigid body to hold passive noncoplanar markers so that the markers could be identified by the camera, mitigating self-occlusion. The enlarged rotational range provides greater freedom for sonographers while performing examinations. The single-axis rotational and translational tracking performance of the system, equipped with the newly designed marker rigid body, were investigated and evaluated. Tracking with the designed marker rigid body achieved high tracking accuracy with 0.57 • for the single-axis rotation and 0.01 mm for the single-axis translation for sensor distance between 1.5-2 m. In addition to maintaining high accuracy, the system also possessed an enhanced ability to capture over 99.76% of the motion data in the experiments. The results demonstrated that with the designed marker rigid body, the missing data was remarkably reduced from over 15% to less than 0.5%, which enables interpolation in the data post-processing. An imaging test was further conducted, and the volume reconstruction of a 4-month fetal phantom was demonstrated using the motion data obtained from the tracking system.

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“…On the one hand, the bone intensity in the US image is noticeably different between the synthetic phantoms (i.e. water phantom [14], [23], Agar-Agar phantom [21]) and the actual human tissue. The surrounding muscles and fat tissues of the human body attenuate the ultrasonic reflection compared to the low acoustic impedance material of phantoms.…”

Section: Introductionmentioning

confidence: 98%

Robot-assisted Ultrasound Reconstruction for Minimally Invasive Spine Surgery: from Bench-top to Pre-clinical Study

Li¹

2022

Preprint

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<p>Objective: Robot-assisted ultrasound (US) system could potentially provide a non-radiative three-dimensional (3D) reconstruction for minimally invasive spine surgery. Despite promising studies on this technology, few researchers provide a comprehensive analysis with technical details. The performance is only showcased in one specific experimental setting without offering insight into robustness and generality of the approach by e.g. verifying performance in various testing scenarios. This limitation impedes the translation of this technology toward clinical practice. Therefore, this study provides a comprehensive assessment of the performance of robot-assisted US system. This study provides all essential technical details from experiments starting at the bench-top up to pre-clinical study. Methods: A hybrid control strategy was proposed to ensure continuous and smooth scanning, while a U-Net based US reconstruction framework was utilized to process the anatomic features automatically. Experiments were conducted on two synthetic spine phantoms and two ex-vivo cadavers. Results: The average deviation of scanning force was 2.84 ± 0.45 N on the synthetic phantom and 5.64 ± 1.10 N on the ex-vivo cadaver. The reconstruction yielded a mean 3D representation error of 1.28 ± 0.87 mm and 1.74 ± 0.89 mm for the synthetic and cadaveric experiments, respectively. Conclusion: The experiments indicated the proposed robot-assisted US system is feasible for relatively independent experiment settings, varying from laboratory experiments to pre-clinical studies. Significance: The developed system offers an improved understanding of the potential for this technology and paves the way for deploying the robotic US system towards in-vivo clinical study.</p>

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Reconstruction and positional accuracy of 3D ultrasound on vertebral phantoms for adolescent idiopathic scoliosis spinal surgery

Cited by 12 publications

References 43 publications

Comparison of Robot Versus Fluoroscopy-Assisted Pedicle Screw Instrumentation in Adolescent Idiopathic Scoliosis Surgery

Comparison of Robot Versus Fluoroscopy-Assisted Pedicle Screw Instrumentation in Adolescent Idiopathic Scoliosis Surgery

Performance Enhanced Ultrasound Probe Tracking With a Hemispherical Marker Rigid Body

Robot-assisted Ultrasound Reconstruction for Minimally Invasive Spine Surgery: from Bench-top to Pre-clinical Study

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