Evaluation of the accuracy of volume determination on the orbit and eyeball using MRI
| dc.contributor.author | Chau, A. | |
| dc.contributor.author | Fung, K. | |
| dc.contributor.author | Yap, M. | |
| dc.date.issued | 2005 | |
| dc.description.abstract | Purpose: 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. Methods: Ten tailor-made spherical silicon balls ranging in size from 5 to 14 cm3 and 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. Results: 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. Conclusion: We conclude that with appropriate calibration, it is viable to use MRI DICOM images to derive the volume of the eyeball and the orbit. | |
| dc.identifier.citation | Radiography, 2005; 11(1):35-39 | |
| dc.identifier.doi | 10.1016/j.radi.2004.10.004 | |
| dc.identifier.issn | 1078-8174 | |
| dc.identifier.uri | https://hdl.handle.net/11541.2/143959 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.relation.funding | Hong Kong Polytechnic University | |
| dc.rights | Copyright 2004 The College of Radiographers | |
| dc.source.uri | https://doi.org/10.1016/j.radi.2004.10.004 | |
| dc.subject | eyes | |
| dc.subject | magnetic resonance imaging | |
| dc.subject | image analysis | |
| dc.title | Evaluation of the accuracy of volume determination on the orbit and eyeball using MRI | |
| dc.type | Journal article | |
| pubs.publication-status | Published | |
| ror.mmsid | 9916434008401831 |