Evidence map›Paper›PMID 33980248›Full record

ArticleRadiation oncology (London, England)2021

Technical assessment of the NDI Polaris Vega optical tracking system.

Giovanni Fattori, Antony John Lomax, Damien Charles Weber, Sairos Safai

Abstract read
In one paragraph

Article in Radiation oncology (London, England), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

12 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Flexible IMU Sensor Array For 3D Colonoscope Shape Reconstruction and AI-Based Loop Detection.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  5. Article
  6. Surgical tooltip localization via concentric nested square markers and depth-RGB multi-coordinate fusion.International journal of computer assisted radiology and surgery · 2025
    Article
  7. A novel SGRT system for real-time optical surface tracking or guidance.Journal of applied clinical medical physics · 2025
    Article
  8. Review
  9. Article
  10. Review
  11. Effect of the application of digital technology-assisted optimization in the process of adjusting jaw position.Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2024
    Article
  12. 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

4 authors.

Giovanni FattoriCenter for Proton Therapy, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland.
Antony John LomaxCenter for Proton Therapy, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland. tony.lomax@psi.ch.
Damien Charles WeberCenter for Proton Therapy, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland.
Sairos SafaiCenter for Proton Therapy, Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Polaris product line from Northern Digital Inc. is well known for accurate optical tracking measurements in research and medical environments. The Spectra position sensor, to date often found in image guided radiotherapy suites, has however reached its end-of-life, being replaced by the new Vega model. The performance in static and dynamic measurements of this new device has been assessed in controlled laboratory conditions, against the strict requirements for system integration in radiation therapy. The system accuracy has improved with respect to the Spectra in both static (0.045 mm RMSE) and dynamic (0.09 mm IQR, < 20 cm/s) tracking and brings marginal improvement in the measurement latency (14.2 ± 1.8 ms). The system performance was further confirmed under clinical settings with the report of early results from periodic QA tests within specifications. Based on our tests, the Polaris Vega meets the quality standards of radiotherapy applications and can be safely used for monitoring respiratory breathing motion or verifying patient positioning.

Indexed as

MovementRespirationHumansImage Processing, Computer-AssistedMonitoring, PhysiologicNeoplasmsRadiotherapy, Image-GuidedBreathing motionIGRTOptical trackingPatient positioning

Identifiers

PMID33980248
PMCPMC8114517

What OpenQuestion holds

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LicenceCC BY
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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.