Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers

David R. Holmes III, Richard A. Robb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Decubitus ulcers can have a deleterious effect on the quality of life for some patients, particularly those prone to chronic development of skin ulcerations. The bones of the pelvis are particularly relevant as nearly half of all ulcerations observed in the hospital are in the pelvic region. This research focuses on the development of methods to extract the ischium and adjacent anatomy from volumetric CT data of the pelvis which will be used for patient-specific modeling of high-pressure regions and the treatment of associated ulcers. Six volumetric CT scans were evaluated to determine the size and shape of the ischial tuberosities. Using oblique images computed from the CT data, cross-sectional measurements (approximately Superior-Inferior, Anterior-Posterior, and Left-Right) were made to estimate the size of the ischial tuberosities. Similar measurements were made on the ischial ramus. The mean length of the ischial tuberosities (S-I direction) is 12.35 cm. The mean dimension in the L-R and A-P directions are 2.97 cm and 3.78 cm, respectively. For the ischial ramus, the S-I, L-R, and A-P mean lengths are 6.57 cm, 1.72 cm, and 1.49 cm. Due to a limited field of view for the CT datasets, the thickness of the soft tissue (i.e. Gluteus Maximus and subcutaneous fat) could not be measured. Using the bony measurements and adjacent soft tissue measurements, an investigator would be able estimate the posterior pelvis forces for calculations of pressure on the proximal skin, which could then be used to predict ulcerations in patients, or to design new ulcer-inhibiting seating devices. Current efforts are focused on collecting a large cohort of data with both bony and soft tissue measurements. Future work will incorporate the physical properties of the soft tissue to specifically predict high-pressure regions.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6141
DOIs
StatePublished - 2006
EventMedical Imaging 2006: Visualization, Image-Guided Procedures, and Display - San Diego, CA, United States
Duration: Feb 12 2006Feb 14 2006

Other

OtherMedical Imaging 2006: Visualization, Image-Guided Procedures, and Display
CountryUnited States
CitySan Diego, CA
Period2/12/062/14/06

Fingerprint

Analytical models
Tissue
Skin
Computerized tomography
Oils and fats
Bone
Physical properties

Keywords

  • CT
  • Decubitus Ulcers
  • Ischial Tuberosities
  • Shape Analysis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Holmes III, D. R., & Robb, R. A. (2006). Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 6141). [614120] https://doi.org/10.1117/12.653507

Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers. / Holmes III, David R.; Robb, Richard A.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6141 2006. 614120.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Holmes III, DR & Robb, RA 2006, Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 6141, 614120, Medical Imaging 2006: Visualization, Image-Guided Procedures, and Display, San Diego, CA, United States, 2/12/06. https://doi.org/10.1117/12.653507
Holmes III DR, Robb RA. Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6141. 2006. 614120 https://doi.org/10.1117/12.653507
Holmes III, David R. ; Robb, Richard A. / Volumetric CT measurement of the ischial tuberosities for designing analytical models of decubitus ulcers. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 6141 2006.
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