Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Validation of the rotation ratios method.

O A Foss1, J Klaksvik, P Benum

  • 1Norwegian Orthopedic Implant Research Unit and Department of Radiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. olav.foss@ntnu.no

Acta Radiologica (Stockholm, Sweden : 1987)
|July 6, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Minor change in the sulcus angle during the first six years of life: a prospective study of the femoral trochlea development in dysplastic and normal knees.

Journal of children's orthopaedics·2018
Same author

Mechanical stability of custom and anatomical femoral stems: an experimental study in human femora.

Hip international : the journal of clinical and experimental research on hip pathology and therapy·2017
Same author

Remembered preoperative Quick disabilities of the arm, shoulder and hand (QuickDASH) scores.

The Journal of hand surgery, European volume·2016
Same author

The repeatability of oVEMP in response to low-frequency vibration against the vertex and forehead.

Journal of vestibular research : equilibrium & orientation·2016
Same author

Comparison of clinical and histopathological evaluations of basal cell carcinoma thickness.

The British journal of dermatology·2015
Same author

Statistical consequences of using bone mineral density to pair cadaver femurs in comparative ex vivo hip fracture studies.

Bone & joint research·2014
Same journal

Preoperative differentiation of adrenal pheochromocytoma and lipid-poor adenoma using CT-based radiomics: a systematic review and meta-analysis.

Acta radiologica (Stockholm, Sweden : 1987)·2026
Same journal

Radiomics based on MRI for preoperative prediction of the tumor budding grade in rectal cancer: a systematic review and meta-analysis.

Acta radiologica (Stockholm, Sweden : 1987)·2026
Same journal

Improved pancreatic imaging with photon-counting CT: a retrospective comparison with conventional CT.

Acta radiologica (Stockholm, Sweden : 1987)·2026
Same journal

The role of ultrasonography in diagnosing cystic adventitial disease.

Acta radiologica (Stockholm, Sweden : 1987)·2026
Same journal

Exploring artificial intelligence in point-of-care and standard breast ultrasound: a paired reader study.

Acta radiologica (Stockholm, Sweden : 1987)·2026
Same journal

Diagnostic performance of contrast-enhanced ultrasound for thyroid nodule characterization: a systematic review and meta-analysis.

Acta radiologica (Stockholm, Sweden : 1987)·2026
See all related articles

The rotation ratios method accurately measures pelvic rotations using sequential radiographs. This validated method shows high accuracy and may be clinically useful for assessing pelvic alignment.

Area of Science:

  • Orthopedics
  • Radiology
  • Biomechanical analysis

Background:

  • The rotation ratios method is a novel technique for analyzing pelvic rotations from sequential radiographs.
  • Previous studies suggest its potential, but empirical validation is lacking.

Purpose of the Study:

  • To rigorously validate the accuracy and reliability of the rotation ratios method for pelvic rotation assessment.
  • To establish the clinical utility of this quantitative method.

Main Methods:

  • Validation involved comparing known pelvic rotations from 165 experimental radiographs (skeletal pelvises) with calculated rotations.
  • A clinical cohort of 262 pelvic radiographs from 46 patients was used to define rotational difference ranges.
  • Robustness and repeatability were assessed through repeated analyses on both experimental and clinical datasets.

Related Experiment Videos

Main Results:

  • Reference points for measurement were easily identifiable and minimally affected by pelvic rotation.
  • The experimental material showed high accuracy, with mean differences of 0.0° (vertical) and 0.1° (transversal) between calculated and real rotations.
  • The method demonstrated good intra- and interobserver repeatability, indicating reliability.

Conclusions:

  • The rotation ratios method exhibits reasonably high accuracy in quantifying pelvic rotations.
  • Its demonstrated reliability and accuracy suggest potential clinical applicability in orthopedic and radiological assessments.