Spiral CT volumetry of below-knee residua

Author

Smith, Kirk E. ; Vannier, Michael W. ; Commean, Paul K.

Author_Institution

Mallinckrodt Inst. of Radiol., Washington Univ. Sch. of Med., St. Louis, MO, USA

Volume

3

Issue

3

fYear

1995

fDate

9/1/1995 12:00:00 AM

Firstpage

235

Lastpage

241

Abstract

Spiral CT volumetric imaging, processing, and analysis of lower extremity residua were developed and tested using cylindrical phantom test objects and a cadaver lower extremity. Spiral CT scan examination was performed to generate image volumes that were segmented to estimate volumes of interest. These volumes were compared to physical volume measurements obtained by hydrostatic weighing. Hydrostatic weighing and spiral CT volume determinations were compared to calculated volumes based on measured dimensions of two cylindrical phantoms. Threshold-based segmentation of below-knee residua scanned with spiral CT in air was shown accurate to within 3% compared to hydrostatic and analytically derived volumes of phantom test objects. Volume of interest segmentation methods of spiral CT image data had a standard error of 0.15% for a cadaver leg. The feasibility and validity of spiral CT scanning and segmentation for volumetric studies of lower limb residua were demonstrated

Keywords

biomedical measurement; computerised tomography; image segmentation; medical image processing; volume measurement; below-knee residua; cadaver leg; cadaver lower extremity; cylindrical phantom test objects; medical diagnostic imaging; segmented image volumes; spiral CT volumetry; threshold-based segmentation; Cadaver; Computed tomography; Extremities; Image analysis; Image generation; Image segmentation; Imaging phantoms; Spirals; Testing; Volume measurement;

fLanguage

English

Journal_Title

Rehabilitation Engineering, IEEE Transactions on

Publisher

ieee

ISSN

1063-6528

Type

jour

DOI

10.1109/86.413196

Filename

413196