Cup Alignment Error Model for Total Hip Arthroplasty

Wolf, Alon; DiGioia, Anthony M.; Mor, Andrew B.; Jaramaz, Branislav

doi:10.1097/01.blo.0000164027.06880.3a

Cited by 98 publications

(75 citation statements)

References 18 publications

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“…2.5D US was first introduced in CAOS to register pre-operative vertebral CT images to the patient coordinate system in computer-assisted spinal surgery (7). This method was also applied to the registration of pre-operative pelvic CT images for percutaneous sacroiliac screwing (14) and for implant positioning in THA (15,16). The basic idea is that the US probe acts like a transcutaneous digitizing probe, by using 'specular reflection' on bone surfaces (the echo time in a given area is near to proportional to the distance between the transducer and the bone surface).…”

Section: Description Of the Echo Surgetics Technologiesmentioning

confidence: 99%

New visualization tools: computer vision and ultrasound for MIS navigation

Kilian¹,

Plaskos²,

Parratte

et al. 2008

Robotics Computer Surgery

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Echo Point provided significantly improved results (p < 0.001) over conventional digitization where mean tilt errors exceeded 20 degrees . The Echo Morphing experiments demonstrated that with a reasonable number of points (ca. 1000) and initial attitude (IA) error (ca. 5-10 mm and 5-10 degrees ) we can obtain an average accuracy of approximately 1 mm that is sufficient for most of clinical applications.

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Section: Description Of the Echo Surgetics Technologiesmentioning

confidence: 99%

New visualization tools: computer vision and ultrasound for MIS navigation

Kilian¹,

Plaskos²,

Parratte

et al. 2008

Robotics Computer Surgery

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show abstract

“…Furthermore, there might be inaccuracy in defining the actual top of the ASIS. However, the technique used is still robust, as a 10-mm error in the location of the top of the ASIS induces only a 3 error in inclination and a 4 error in flexion [13]. We observed that the intra-operative palpation of this plane by a cutaneous technique was reproducible, with a mean variation of less than 5 between different registrations in all three directions.…”

Section: Discussionmentioning

confidence: 68%

Navigated non-image-based registration of the position of the pelvis during THR. An accuracy and reproducibility study

Jenny

Boéri

Ciobanu

2008

Computer Aided Surgery

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The precise recording of the position of the pelvis is a prerequisite for total hip replacement (THR). The anterior pelvic plane is an accepted reference for determining the 3D pelvic orientation. We hypothesized that cutaneous palpation of this plane was accurate and reproducible.Ten consecutive navigated implantations of THR prostheses were studied. In each case, four palpations of both anterior iliac spines and the pubic symphysis were performed with a navigated stylus. The first palpation was made on actual bone contours through a skin puncture and was considered as the reference. The other three palpations were made over the intact skin as a normal intra-operative procedure.There was no significant difference between the pelvic orientations measured by the three cutaneous palpations, or between the orientations measured by transcutaneous palpation and the mean result with cutaneous palpation.Cutaneous palpation can be considered as a reliable technique for the definition of pelvic orientation during THR with the non-image-based system employed.

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“…Some studies have shown that the APP is not appropriate for positioning the acetabular components [23]. To our knowledge, there is no reliable reference that can be easily identified during an operation.…”

Section: Discussionmentioning

confidence: 99%

A robust method to extract the anterior pelvic plane from CT volume independent of pelvic pose

Lee

Kim

et al. 2017

Computer Assisted Surgery

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Purpose: The anterior pelvic plane (APP) is commonly used as a reference plane to assess acetabular orientation. However, conventional methods for determining the APP may not be accurate and are prone to user variability. To overcome these issues, we developed a robust method to accurately extract the APP independent of pelvic pose using three-dimensional pelvic computed tomography (CT). Materials and methods: Twenty-eight studies for suspected nonmusculoskeletal conditions were obtained. The APP was determined by four landmarks that were automatically extracted from user-defined regions of interest (ROIs) with compensation of pelvic pose. The APP defined from these landmarks was quantitatively compared to the APPs determined by an expert and an unskilled. Intraobserver reliability was measured to evaluate the time-interval variability. Finally, we evaluate the robustness of this method to patient posture using an arbitrarily rotated volume. The intraclass correlation coefficients (ICCs) were calculated to determine the interobserver and intraobserver reliabilities. Results:The ICC values for the four landmarks and the APP were similar between the semiautomated method and expert determination (ICC >0.937). The ICC values for intraobserver reliability over time for our method were all 1, demonstrating high reliability. Furthermore, agreement between the parameters determined from the original volume and the rotated volume was nearly perfect. Conclusions: Our method is a useful measurement tool for the APP as it is robust, and the results were similar to an experienced surgeon's determination. Furthermore, it was independent to the direction of the CT slice and more robust than a measurement by an unskilled.

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Cup Alignment Error Model for Total Hip Arthroplasty

Cited by 98 publications

References 18 publications

New visualization tools: computer vision and ultrasound for MIS navigation

New visualization tools: computer vision and ultrasound for MIS navigation

Navigated non-image-based registration of the position of the pelvis during THR. An accuracy and reproducibility study

A robust method to extract the anterior pelvic plane from CT volume independent of pelvic pose

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