Purpose: To investigate the feasibility of 3 T MR iterative decomposition of water and fat imaging (IDEAL) sequences for imaging of Graves' ophtalmopathy, assessing extraocular muscle size and proptosis value. Methods and Materials: 3 T IDEAL MRI was performed on 56 patients with symptoms of Graves' orbitopathy. Coronal and axial T2-weighted IDEAL fast spin-echo sequences were acquired in all patients; axial scans were obtained in the neuro-ocular plane. Since IDEAL sequences permit fast and accurate water-fat separation with a single acquisition, we measured maximum crosssectional area of extraocular muscles (EOM) on coronal T2 sequences after a visual comparison between water-only and fat-only images with a free-hand ROI. Proptosis value was quantified on axial images with Hertel Index, i.e. the distance from the interzygomatic line and the apex of the globe; correlation was measured with the Pearson correlation coefficient. Results: We found a moderate correlation (p < 0.05) between
Feasibility of 3T IDEAL MR of the orbits for imaging of Graves’ ophtalmopathy: correlation between quantitative evaluation of extraocular muscle size and proptosis value / D., Guerrieri; Panzironi, Giuseppe; M., Guida; C., Di Paola; DE CRISTOFARO, Flaminia; L., Garau. - ELETTRONICO. - (2014), pp. s173-s173. (Intervento presentato al convegno European Congress of Radiology 2014 tenutosi a Vienna nel Marzo 2014) [10.1007/s13244-014-0317-5].
Feasibility of 3T IDEAL MR of the orbits for imaging of Graves’ ophtalmopathy: correlation between quantitative evaluation of extraocular muscle size and proptosis value
PANZIRONI, Giuseppe;DE CRISTOFARO, Flaminia;
2014
Abstract
Purpose: To investigate the feasibility of 3 T MR iterative decomposition of water and fat imaging (IDEAL) sequences for imaging of Graves' ophtalmopathy, assessing extraocular muscle size and proptosis value. Methods and Materials: 3 T IDEAL MRI was performed on 56 patients with symptoms of Graves' orbitopathy. Coronal and axial T2-weighted IDEAL fast spin-echo sequences were acquired in all patients; axial scans were obtained in the neuro-ocular plane. Since IDEAL sequences permit fast and accurate water-fat separation with a single acquisition, we measured maximum crosssectional area of extraocular muscles (EOM) on coronal T2 sequences after a visual comparison between water-only and fat-only images with a free-hand ROI. Proptosis value was quantified on axial images with Hertel Index, i.e. the distance from the interzygomatic line and the apex of the globe; correlation was measured with the Pearson correlation coefficient. Results: We found a moderate correlation (p < 0.05) betweenI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
