Measuring Humeral Head Translation Using Fluoroscopy: A Validation Study

Details

• Personal Author:
  Karduna AR ; San Juan JG
• Description:
  Numerous techniques have been employed to monitor humeral head translation due to its involvement with several shoulder pathologies. However, most of the techniques were not validated. The objective of this study is to compare the accuracy of manual digitization and contour registration in measuring superior translation of the humeral head. Eight pairs of cadaver scapulae and humerii bones were harvested for this study. Each scapula and humerus was secured in a customized jig that allowed for control of humeral head translations and a vise that permitted rotations of the scapula about three axes. Fluoroscopy was used to take images of the shoulder bones. Scapular orientation was manipulated in different positions while the humerus was at 90 degrees of humeral elevation in the scapular plane. Humeral head translation was measured using the two methods and was compared to the known translation. Additionally, accuracy of the contour registration method to measure 2-D scapular rotations was assessed. The range for the root mean square (RMS) error for manual digitization method was 0.27 mm-0.43 mm and the contour registration method had a RMS error ranging from 0.18 mm-0.40 mm. In addition, the RMS error for the scapular angle rotation using the contour registration method was 2.4 degrees . Both methods showed acceptable errors. However, on average, the contour registration method showed lesser measurement error compared to the manual digitization method. In addition, the contour registration method was able to show good accuracy in measuring rotation that is useful in 2-D image analysis. [Description provided by NIOSH]
• Subjects:
  Biological Factors Biomechanical Phenomena Clinical Laboratory Techniques Laboratories Musculoskeletal System Occupational Health Safety
• Keywords:
  2-D Measurement Author Keywords: Glenohumeral Kinematics Biodynamics Biological-factors Biological-function Biological-systems Biomechanical-modeling Biomechanics Bone-structure Clinical-techniques Fluoroscopy Humeral Head Laboratory-testing Musculoskeletal-system Skeletal-movement Skeletal-system Statistical-analysis Superior Translation

  More +
• ISSN:
  0021-9290
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; Oregon ; OSHA Region 10 ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  43
• Issue:
  4
• NIOSHTIC Number:
  nn:20036848
• Citation:
  J Biomech 2010 Mar; 43(4):771-774
• Contact Point Address:
  Jun G. San Juan, Loras College, Division of Physical Education and Sports Studies, 1450 Alta Vista St., Dubuque, IA 52001
• Email:
  jun.sanjuan@loras.edu
• Federal Fiscal Year:
  2010
• Performing Organization:
  University of Oregon
• Peer Reviewed:
  True
• Start Date:
  20070301
• Source Full Name:
  Journal of Biomechanics
• End Date:
  20110228
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4dee22f71e27909e918b297b5a759c700e2ea79b2da4173da3524c890a51b2420527ada5de2fb69aad11e76c53a909d3705d7018edf7ad73430848d4721f07a4
• Download URL:
  https://stacks.cdc.gov/view/cdc/188100/cdc_188100_DS1.pdf
• File Type:
  [PDF - 300.13 KB ]