Tags

Type your tag names separated by a space and hit enter

Magnetic resonance imaging and Orbscan assessment of the anterior chamber.
J Cataract Refract Surg. 2005 Sep; 31(9):1713-8.JC

Abstract

PURPOSE

To evaluate the correlation between white-to-white (WTW) distance as assessed by Orbscan II (Bausch & Lomb) and high-resolution magnetic resonance imaging (MRI) sulcus-sulcus (S-S) measures and to analyze the correlation between age and anterior chamber parameters.

SETTING

Istituto per la Ricerca e la Cura del Cancro, Candiolo, Torino, Italy.

METHODS

Eighty-eight patients had MRI with a 1.5 Tesla imager (GE Medical Systems) using a 3-inch circular coil. T1 weighted fast spin-echo scans were performed on the axial plane. Orbscan II was also used to measure WTW distance, K, anterior chamber depth (ACD), and lens curvature. One eye was randomly selected for analysis. Measures were compared using Spearman correlation, paired Student t test, and analysis of variance (ANOVA; post hoc: Scheffé). Intersession variability was performed in 10 patients. Ten MRI images were randomly selected and measured by 2 operators in a masked fashion (intrasession variability).

RESULTS

Intersession and intrasession correlation was good for MRI (r = 0.89 and r = 0.92, respectively), and intersession was good for Orbscan (r = 0.91). When comparing Orbscan II and MRI results, the ACD was well correlated and not significantly different, whereas the S-S and the WTW measures were not correlated and significantly different. Lens thickness and lens diameter were directly correlated with age; S-S, WTW, lens curvature, and ACD were inversely correlated with age.

CONCLUSIONS

Current methods of measuring the WTW were poorly correlated with anatomical measures. The S-S diameter and other anterior chamber structures significantly change with age, which could give rise to potential problems with posterior chamber phakic intraocular lens sizing position.

Authors+Show Affiliations

Dipartimento di Fisiopatologia Clinica, Clinica Oculistica dell'Università di Torino, Candiolo, Torino, Italy. antoniofea@interfree.itNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16246773

Citation

Fea, Antonio M., et al. "Magnetic Resonance Imaging and Orbscan Assessment of the Anterior Chamber." Journal of Cataract and Refractive Surgery, vol. 31, no. 9, 2005, pp. 1713-8.
Fea AM, Annetta F, Cirillo S, et al. Magnetic resonance imaging and Orbscan assessment of the anterior chamber. J Cataract Refract Surg. 2005;31(9):1713-8.
Fea, A. M., Annetta, F., Cirillo, S., Campanella, D., De Giuseppe, M., Regge, D., & Grignolo, F. M. (2005). Magnetic resonance imaging and Orbscan assessment of the anterior chamber. Journal of Cataract and Refractive Surgery, 31(9), 1713-8.
Fea AM, et al. Magnetic Resonance Imaging and Orbscan Assessment of the Anterior Chamber. J Cataract Refract Surg. 2005;31(9):1713-8. PubMed PMID: 16246773.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Magnetic resonance imaging and Orbscan assessment of the anterior chamber. AU - Fea,Antonio M, AU - Annetta,Federica, AU - Cirillo,Stefano, AU - Campanella,Delia, AU - De Giuseppe,Massimo, AU - Regge,Daniele, AU - Grignolo,Federico M, PY - 2005/02/11/accepted PY - 2005/10/26/pubmed PY - 2005/12/15/medline PY - 2005/10/26/entrez SP - 1713 EP - 8 JF - Journal of cataract and refractive surgery JO - J Cataract Refract Surg VL - 31 IS - 9 N2 - PURPOSE: To evaluate the correlation between white-to-white (WTW) distance as assessed by Orbscan II (Bausch & Lomb) and high-resolution magnetic resonance imaging (MRI) sulcus-sulcus (S-S) measures and to analyze the correlation between age and anterior chamber parameters. SETTING: Istituto per la Ricerca e la Cura del Cancro, Candiolo, Torino, Italy. METHODS: Eighty-eight patients had MRI with a 1.5 Tesla imager (GE Medical Systems) using a 3-inch circular coil. T1 weighted fast spin-echo scans were performed on the axial plane. Orbscan II was also used to measure WTW distance, K, anterior chamber depth (ACD), and lens curvature. One eye was randomly selected for analysis. Measures were compared using Spearman correlation, paired Student t test, and analysis of variance (ANOVA; post hoc: Scheffé). Intersession variability was performed in 10 patients. Ten MRI images were randomly selected and measured by 2 operators in a masked fashion (intrasession variability). RESULTS: Intersession and intrasession correlation was good for MRI (r = 0.89 and r = 0.92, respectively), and intersession was good for Orbscan (r = 0.91). When comparing Orbscan II and MRI results, the ACD was well correlated and not significantly different, whereas the S-S and the WTW measures were not correlated and significantly different. Lens thickness and lens diameter were directly correlated with age; S-S, WTW, lens curvature, and ACD were inversely correlated with age. CONCLUSIONS: Current methods of measuring the WTW were poorly correlated with anatomical measures. The S-S diameter and other anterior chamber structures significantly change with age, which could give rise to potential problems with posterior chamber phakic intraocular lens sizing position. SN - 0886-3350 UR - https://www.unboundmedicine.com/medline/citation/16246773/Magnetic_resonance_imaging_and_Orbscan_assessment_of_the_anterior_chamber_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0886-3350(05)00425-6 DB - PRIME DP - Unbound Medicine ER -