Evaluation of the accuracy of volume determination on the orbit and eyeball using MRI

Anson Chau, Karl Fung, Keng Hung Maurice Yap

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

This study reports a calibration carried out on phantoms simulating the orbit and eyeball to evaluate the accuracy of volumetric determination using MRI DICOM (Digital Imaging and Communication in Medicine) images. Ten tailor-made spherical silicon balls ranging in size from 5 to 14 cm3and 10 silicon moulds of orbits from 10 human dried skulls were used to simulate the eyes and orbits, respectively. The CISS (Constructive interference in steady state, TR/TE = 16/8 ms) T2-weighted sequence was taken using a Siemens MRI scanner. The volume of each phantom was computed and compared with the known physical volumes. The computed and physical volumes were highly correlated for both eyeball (r = 0.997) and the orbit (r = 0.992) phantoms. Coefficients of variation of the computed and physical volumes were low. Consequently, it is possible to apply a calibration value to the computed volume to derive the physical volume with a high level of confidence. We conclude that with appropriate calibration, it is viable to use MRI DICOM images to derive the volume of the eyeball and the orbit.
Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalRadiography
Volume11
Issue number1
DOIs
Publication statusPublished - 1 Feb 2005

Keywords

  • Diagnostic radiology physics
  • Eyes
  • Image analysis
  • Image handling
  • Image processing

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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