Scoliosis

, 8:P4 | Cite as

Interest of standardization of feet position during 3-dimensional trunk capture

  • Gregory Notin
  • Sophie Pourret
  • Cyril Lecante
  • Julie Deceuninck
  • Nicolas Fraisse
  • Jean Claude Bernard
Open Access
Poster presentation
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Keywords

Public Health Optical Sensor Single Operator Anterior Superior Iliac Spine Natural Position 

Background

Follow-up visits with scoliotic patients require too many radiologic exams. The ORTEN optical sensor[1, 2] captures the external shape of the trunk in 3-dimensions that can be used for intermediary exams and limit the usage of x-rays.

Purpose

The objective of this study was to demonstrate the value-added benefit of the standardization of the feet posture during the digitization of the patient’s trunk.

Methods

a. Bare skin acquisition. b. Cutaneous benchmark: the first sacral piece (S1), the anterior superior iliac spine (ASIS). c. First acquisition in standard position, feet spread natural, hands at shoulder height into vertical bars, elbows drooping. d. Second acquisition in the same position but with feet in a board position with heels spaced 19cm apart[3]. e. A single operator. f. Measuring the angle S1, ASIS right relative to the horizontal and the angle S1, ASIS left relative to the horizontal on the acquisition software Orten file. An average is taken, the angle (S1, ASIS) relative to the horizontal. g. Comparing 24 samples (20 women and 4 men) with two acquisitions. h. Nine samples (7 women and 2 men) are reacquired three days later.

Results

a. The angle (S1, EIAS) without platform: from 7.8° to 30°. Average: 16.2° deviation: 22.2°. b. The angle (S1, EIAS) with platform: from 5.95° to 34.7°. Average: 15.9° deviation: 28.75°. c. Difference of -13° to 6.2°. Average: -0.3° deviation: 19.2°. Variations were observed in both directions with an overestimated gap when using the platform. d. Without platform: Difference after three days -9.75° to 10.7°. Average: -1.4° deviation: 20.45°. e. With platform: Difference after three days -8.6° to 18.25°. Average: 1.4° deviation: 26.85°. More variation is observed when the platform is used.

Conclusions and discussion

The trend would be to choose the natural position of the feet in order to obtain an exam as reproducible as possible.

References

  1. 1.
    Cottalorda J, Kohler R, Garin C, Genevois P, Lecante C, Berge B: Orthoses for mild scoliosis : a prospective study comparing traditional plaster mold manufacturing with fast, noncontact, 3-dimensional acquisition. Spine. 2005, 30 (4): 399-405. 10.1097/01.brs.0000153346.40391.3b.CrossRefPubMedGoogle Scholar
  2. 2.
    Cottalorda J, Kohler R, Garin C, Lecante P: Traitement orthopédique de la scoliose: nouvelle technique de prise dempreinte par proc optique. Arch Pediatr. 1997, 4 (5): 464-467. 10.1016/S0929-693X(97)86677-8.CrossRefPubMedGoogle Scholar
  3. 3.
    Gaux JC, Henrard JC, de Maulmont C, Blery M, Bismuth V: [Measurement of leg length inequality using a simple radiologic method]. Journal de radiologie, d'’electrologie, et de medecine nucleaire . 1974, 55 (8-9): 615-6.Google Scholar

Copyright information

© Notin et al; licensee BioMed Central Ltd. 2013

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Authors and Affiliations

  • Gregory Notin
    • 1
  • Sophie Pourret
    • 1
  • Cyril Lecante
    • 1
  • Julie Deceuninck
    • 1
  • Nicolas Fraisse
    • 1
  • Jean Claude Bernard
    • 1
  1. 1.LecanteLyonFrance

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