Stereoscopic liver surface reconstruction.

Spińczyk, Dominik; Karwan, Adam; Rudnicki, Jerzy; Wróblewski, Tadeusz

doi:10.5114/wiitm.2011.28872

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…Respiratory gating technology through real-time monitoring of the cyclic deformation of the liver can also compensate for changes in the tracking position of the EM sensor. 17,18 Due to the rigidity of our 3D printed model of the biliary tree, respiratory-related deformation and movement of the patient’s liver could not be effectively reproduced to ensure optimal registration.…”

Section: Discussionmentioning

confidence: 99%

Choledochoscopic Examination of a 3-Dimensional Printing Model Using Augmented Reality Techniques: A Preliminary Proof of Concept Study

Tang

et al. 2018

Surg Innov

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Section: Discussionmentioning

confidence: 99%

Choledochoscopic Examination of a 3-Dimensional Printing Model Using Augmented Reality Techniques: A Preliminary Proof of Concept Study

Tang

et al. 2018

Surg Innov

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“…In the presented approach [1] two well-known methods for solving the correspondence problem were taken into account:RANdom SAmple Consensus (RANSAC) [3],Lucas-Kanade [5]. …”

Section: Methodsmentioning

confidence: 99%

“…The paper presents the evaluation methodology of a practical approach to measure liver motion, both respiratory and laparoscopic, with a tool guided in the operating room. The evaluation was based on the methodology described in the previous paper [1]. …”

Section: Introductionmentioning

confidence: 99%

In vitro evaluation of stereoscopic liver surface reconstruction.

Spińczyk

Karwan²,

Zylkowski³

et al. 2013

Videosurgery and Other Miniinvasive Techniques

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IntroductionTracking abdominal motion of organs is an important factor in image-guided navigation systems. The paper presents the evaluation methodology of a practical approach to measure liver motion, both respiratory and laparoscopic, with a tool guided in the operating room. AimEvaluation of the methodology of a practical approach to measure liver motion, both respiratory and laparoscopic, with a tool guided in the operating room. Material and methodsThe presented evaluation method is based on standard operating room equipment, i.e. laparoscopic cameras. We decided to use two rigid cameras to gain stereo in order to reconstruct characteristic points by triangulation. Our research aim was to survey the impact of three parameters on reconstruction accuracy: the number of calibration points, the imprecision of camera assembly, and the difference in resolution of images. ResultsThree calibration chessboard configurations were tested. The reconstructed landmark positions and residual mean square errors were presented in three phantom poses: the reference position, translated position and rotated position. ConclusionsThe presented approach is a development of the previous work. Our research proved the importance of a rigid stereo camera system and the use of high definition image resolution for both stages, namely calibration and reconstruction.

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“…For percutaneous abdomen intervention (e.g. liver radiofrequency (RF) tumor ablation, liver biopsy), surgeons lack real-time visual feedbacks about the location of the needle on planning images, typically computed tomography (CT), and breathing is one of the most important causes of internal organ movement [ 1 – 3 ]. One difficulty lies in tracking and synchronizing both the tool movement and the patient breathing motion.…”

Section: Introductionmentioning

confidence: 99%

Image-based guidance of percutaneous abdomen intervention based on markers for semi-automatic rigid registration.

Spińczyk¹

2014

Videosurgery and Other Miniinvasive Techniques

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IntroductionFor percutaneous abdomen intervention (e.g. liver radiofrequency (RF) tumor ablation, liver biopsy), surgeons lack real-time visual feedback about the location of the needle on planning images, typically computed tomography (CT). One difficulty lies in tracking and synchronizing both the tool movement and the patient breathing motion.AimTo verify the correspondence between rigid registration fiducial registration error signal and breathing phase.Material and methodsDesigned markers that are clearly visible both in planning CT and on the patient during the intervention are proposed. Registration and breathing synchronization is then performed by a point-based approach. The method was tested in a clinical environment on 10 patients with liver cancer using 3D abdominal CT in the exhale position. Median rigid fiducial registration error (FRE) in the breathing cycle was used as a criterion to distinguish the inhale and exhale phase.ResultsThe correlation between breathing phase and FRE value can be observed for every patient. We obtained mean median FRE equal to 9.37 mm in exhale positions and 15.56 mm in the whole breathing cycle.ConclusionsThe presented real time approach, based on FRE calculation, was integrated in the clinical pipeline, and can help to select the best respiratory phase for needle insertion for percutaneous abdomen intervention, in cases where only 3D CT is performed. Moreover, this method allows semi-automated rigid registration to establish the correspondence between preoperative patient anatomical model and patient position.

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Stereoscopic liver surface reconstruction.

Cited by 12 publications

References 15 publications

Choledochoscopic Examination of a 3-Dimensional Printing Model Using Augmented Reality Techniques: A Preliminary Proof of Concept Study

Choledochoscopic Examination of a 3-Dimensional Printing Model Using Augmented Reality Techniques: A Preliminary Proof of Concept Study

In vitro evaluation of stereoscopic liver surface reconstruction.

Image-based guidance of percutaneous abdomen intervention based on markers for semi-automatic rigid registration.

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