Optimal CT scanning plan for long-bone 3-D reconstruction

Cinzia Zannoni, Angelo Cappello, Marco Viceconti

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Digital computed tomographic (CT) data are widely used in three-dimensional (3-D) reconstruction of bone geometry and density features for 3-D modeling purposes. During in vivo CT data acquisition the number of scans must be limited in order to protect patients from the risks related to X-ray absorption. Aim of this work is to automatically define, given a finite number of CT slices, the scanning plan which returns the optimal 3-D reconstruction of a bone segment from in vivo acquired CT images. An optimization algorithm based on a DiscardInsert-Exchange technique has been developed. In the proposed method the optimal scanning sequence is searched by minimizing the overall reconstruction error of a two-dimensional (2-D) prescanning image: An anterior-posterior (AP) X-ray projection of the bone segment. This approach has been validated in vitro on three different femurs. The 3-D reconstruction errors obtained through the optimization of the scanning plan on the 2-D prescanning images and on the corresponding 3-D data sets have been compared. Two-dimensional and 3-D data sets have been reconstructed by linear interpolation along the longitudinal axis. Results show that direct 3-D optimization yields root mean square reconstruction errors which are only 4%-7% lower than the 2-D-optimized plan, thus proving that 2-D-optimization provides a good suboptimal scanning plan for 3-D reconstruction. Further on, 3-D reconstruction errors given by the optimized scanning plan and a standard radiological protocol for long bones have been compared. Results show that the optimized plan yields 20%-50% lower 3-D reconstruction errors.

Original languageEnglish
Pages (from-to)663-666
Number of pages4
JournalIEEE Transactions on Medical Imaging
Volume17
Issue number4
Publication statusPublished - 1998

Fingerprint

Bone
Scanning
Bone and Bones
X-Rays
Bone Density
Femur
X ray absorption
Data acquisition
Interpolation
X rays
Geometry
Datasets
In Vitro Techniques

Keywords

  • Bone reconstruction
  • Computed tomography
  • Ct scanning plan
  • Optimal slice positioning

ASJC Scopus subject areas

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Computational Theory and Mathematics

Cite this

Optimal CT scanning plan for long-bone 3-D reconstruction. / Zannoni, Cinzia; Cappello, Angelo; Viceconti, Marco.

In: IEEE Transactions on Medical Imaging, Vol. 17, No. 4, 1998, p. 663-666.

Research output: Contribution to journalArticle

Zannoni, Cinzia ; Cappello, Angelo ; Viceconti, Marco. / Optimal CT scanning plan for long-bone 3-D reconstruction. In: IEEE Transactions on Medical Imaging. 1998 ; Vol. 17, No. 4. pp. 663-666.
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