Evidence map›Paper›PMID 29808466›Full record

ArticleInternational journal of computer assisted radiology and surgery2018

A deep learning framework for segmentation and pose estimation of pedicle screw implants based on C-arm fluoroscopy.

Hooman Esfandiari, Robyn Newell, Carolyn Anglin, John Street, Antony J Hodgson

Abstract read
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In one paragraph

Article in International journal of computer assisted radiology and surgery, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Artificial Intelligence Applications in Musculoskeletal Imaging.Current reviews in musculoskeletal medicine · 2025
    Review
  6. Article
  7. A fully automatic fiducial detection and correspondence establishing method for online C-arm calibration.International journal of computer assisted radiology and surgery · 2025
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Evaluation of single-stage vision models for pose estimation of surgical instruments.International journal of computer assisted radiology and surgery · 2023
    Article
  13. Review
  14. Article
  15. An X-Ray C-Arm Guided Automatic Targeting System for Histotripsy.IEEE transactions on bio-medical engineering · 2023
    Article
  16. Bone density optimized pedicle screw insertion.Frontiers in bioengineering and biotechnology · 2023
    Article
  17. Review
  18. Artificial intelligence in spine care: current applications and future utility.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2022
    Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Hooman EsfandiariBiomedical Engineering, Surgical Technologies Lab, Robert H.N. Ho Research Centre, University of British Columbia, 6th Floor, 2635 Laurel St, Vancouver, BC, V5Z 1M9, Canada. hooman.esfandiari@ubc.ca.ORCID http://orcid.org/0000-0003-2572-1798
Robyn NewellBiomedical Engineering, Surgical Technologies Lab, University of British Columbia, Vancouver, Canada.
Carolyn AnglinBiomedical Engineering, Civil Engineering, McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Canada.ORCID http://orcid.org/0000-0003-3483-8066
John StreetCombined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, Canada.
Antony J HodgsonDepartment of Mechanical Engineering, Biomedical Engineering, Surgical Technologies Lab, University of British Columbia, Vancouver, Canada.ORCID http://orcid.org/0000-0002-3107-581X
University of British Columbia · CAUniversity of Calgary · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePedicle screw fixation is a challenging procedure with a concerning rates of reoperation. After insertion of the screws is completed, the most common intraoperative verification approach is to acquire anterior-posterior and lateral radiographic images, based on which the surgeons try to visually assess the correctness of insertion. Given the limited accuracy of the existing verification techniques, we identified the need for an accurate and automated pedicle screw assessment system that can verify the screw insertion intraoperatively. For doing so, this paper offers a framework for automatic segmentation and pose estimation of pedicle screws based on deep learning principles.

methodsSegmentation of pedicle screw X-ray projections was performed by a convolutional neural network. The network could isolate the input X-rays into three classes: screw head, screw shaft and background. Once all the screw shafts were segmented, knowledge about the spatial configuration of the acquired biplanar X-rays was used to identify the correspondence between the projections. Pose estimation was then performed to estimate the 6 degree-of-freedom pose of each screw. The performance of the proposed pose estimation method was tested on a porcine specimen.

resultsThe developed machine learning framework was capable of segmenting the screw shafts with 93% and 83% accuracy when tested on synthetic X-rays and on clinically realistic X-rays, respectively. The pose estimation accuracy of this method was shown to be [Formula: see text] and [Formula: see text] on clinically realistic X-rays.

conclusionsThe proposed system offers an accurate and fully automatic pedicle screw segmentation and pose assessment framework. Such a system can help to provide an intraoperative pedicle screw insertion assessment protocol with minimal interference with the existing surgical routines.

Indexed as

Pedicle ScrewsFluoroscopyHumansMachine LearningReoperationSpinal FusionSurgery, Computer-AssistedTomography, X-Ray ComputedConvolutional neural networksDeep learningPedicle screwPose estimationSegmentationSurgical navigation

Identifiers

PMID29808466
OpenAlexW2805515969

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.