The investigation of the lower limb geometry using 3D sonography and magnetic resonance

Świątek‐Najwer, Ewelina; Krysztoforski, K.; Dragan, Szymon; Będziński, R.

doi:10.1016/j.measurement.2011.12.020

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…Furthermore, their designs are not space saving in forming a line from several dots and would be difficult to use in a limited field-of-view linear array probe. For Lasso et al .,[21] Świaątek-Najwer et al .,[22] Rao et al . 's[23] designs, and Plus toolkit,[21] the stack of same-sized N-fiducials and mirrored fiducials would cause near linearity of point sets in the center of the design where it should be the most scanned area.…”

Section: Discussionmentioning

confidence: 99%

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A novel design of N-fiducial phantom for automatic ultrasound calibration

Chatrasingh

Suthakorn

2019

J Med Phys

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Background:Freehand ultrasound (US) is a technique used to acquire three-dimensional (3D) US images using a tracked 2D US probe. Calibrating the probe with a proper calibration phantom improves the precision of the technique and allows several applications in computer-assisted surgery. N-fiducial phantom is widely used due to the robustness of precise fabrication and convenience of use. In principle, the design supports single-frame calibration by providing at least three noncollinear points in 3D space at once. Due to this requirement, most designs contain multiple N-fiducials in unpatterned and noncollinear arrangements. The unpatterned multiple N-fiducials appearing as scattered dots in the US image are difficult to extract, and the extracted data are usually contaminated with noise. In practice, the extraction mostly relied on manual interventions, and calibration with N-fiducial phantom has not yet achieved high accuracy with single or few frame calibrations due to noise contamination.Aims:In this article, we propose a novel design of the N-fiducial US calibration phantom to enable automatic feature extraction with comparable accuracy to multiple frame calibration.Materials and Methods:Along with the design, the Random Sample Consensus (RANSAC) algorithm was used for feature extraction with both 2D and 3D models estimation. The RANSAC feature extraction algorithm was equipped with a closed-form calibration method to achieve automatic calibration.Results:The accuracy, precision, and shape reconstruction errors of the calibration acquired from the experiment were significantly matched with the previous literature reports.Conclusions:The results showed that our proposed method has a high efficiency to perform automatic feature extraction compared to conventional extraction performed by humans.

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Section: Discussionmentioning

confidence: 99%

“…Świaątek-Najwer et al . [22] and Rao et al . [23] also calibrated a US probe on a phantom with a similar concept to Plus toolkit.…”

Section: Introductionmentioning

confidence: 99%

A novel design of N-fiducial phantom for automatic ultrasound calibration

Chatrasingh

Suthakorn

2019

J Med Phys

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“…To test the system in clinical conditions five volunteer probands were subjected to magnetic resonance imaging and study using the proposed system. To test lower limb length, femur length and three‐dimensional collodiaphyseal angle the following scans were recorded: femur head (three scans of various intersections), condyles, distal epiphysis of tibia, neck and femur shaft17.…”

Section: Methodsmentioning

confidence: 99%

Noninvasive ultrasonic measuring system for bone geometry examination

Krysztoforski

Krowicki

Świątek‐Najwer

et al. 2011

Robotics Computer Surgery

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“…HMDs are successfully incorporated in computer assisted surgery (CAS), where the virtual surgery plan (VSP) is presented with guidelines and critical anatomy. Another CAS method that has been used to support various procedures is intraoperative navigation, also referred to as image‐guided surgery (IGS) 9–11 . Many methods for 3D model presentation are developed to contribute with new user‐friendly methods which optimise both time and surgery outcome results 12 .…”

Section: Introductionmentioning

confidence: 99%

Replacing cutting guides with an augmented reality‐based navigation system: A feasibility study in the maxillofacial region

Pietruski

Majak

Świątek‐Najwer

et al. 2023

Robotics Computer Surgery

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Purpose:The work presents outcomes of simulated maxillofacial skeleton osteotomies supported with cutting guides or one of two AR-based intraoperative navigation systems. Material and Methods:The series of osteotomies supported with a cutting guide, simple AR (sAR) or navigated AR (nAR) module were carried out on 15 (five per each method) skull models according to the virtual surgical plan (VSP). Each method was used to support 40 osteotomies involving the upper jaw and 40 involving the orbital region (16 osteotomies on each model). Postoperative computed tomography scans were fused with the VSP to analyse angular deviations from the planned cutting trajectory (°) and the deviations of labelled control points (mm).Results: Guides provided the highest accuracy, with a mean osteotomy angular deviation of 3.73 � 2.94°and a mean control point deviation of 1.30 � 0.73 mm.Mean angular deviations for the sAR-and nAR-assisted osteotomies were 5.93 � 5.12°and 6.75 � 5.33°, and mean control point deviations amounted to 1.86 � 0.88 mm and 1.97 � 0.70 mm.

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The investigation of the lower limb geometry using 3D sonography and magnetic resonance

Cited by 10 publications

References 10 publications

A novel design of N-fiducial phantom for automatic ultrasound calibration

A novel design of N-fiducial phantom for automatic ultrasound calibration

Noninvasive ultrasonic measuring system for bone geometry examination

Replacing cutting guides with an augmented reality‐based navigation system: A feasibility study in the maxillofacial region

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