The evaluation of the retrobulbar orbital fat tissue and optic nerve with strain ratio elastography.
OBJECTIVE
The aim of this study was to evaluate the diagnostic performance of strain ratio elastography in the assessment of retrobulbar orbital fat tissue.


METHODS
The retrobulbar fat tissue of 14 eyes in 14 participants was scanned by sonoelastography. All the participants had permanent vision loss secondary to glaucoma in at least one eye. The elasticity scores were determined and the strain ratio was based on the comparison of the average strain measured in the retrobulbar fat tissue around the optic nerve at the same depth.


RESULTS
The mean strain values for the optic nerve (B) and the retrobulbar fat tissue (A) were 0.78+/-0.61 and 1.43+/-0.99, respectively (p=0.005). The mean strain ratio (B/A) was 0.56+/-0.24.


CONCLUSIONS
This preliminary study showed that by providing strain values and ratios of different orbital tissues sonoelastography may have a potential use in the diagnosis and follow-up of orbital inflammatory and infiltrative diseases.
Department of Radiology,Ankara Numune Training and Research Hospital, Ankara, Turkey. E-mail: mvural99@hotmail.com.
Murat
M
Vural
Department of Radiology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Dilek
D
Acar
Department of Radiology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Uğur
U
Toprak
Department of Ophthalmology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Mehmet Numan
MN
Alp
Department of Ophthalmology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Özlem Gürbüz
ÖG
Köz
Department of Radiology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Bige
B
Sayın
Department of Radiology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
Gizem Kuşçuoğlu
GK
Abat
D000273:Adipose Tissue / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D050154:Adiposity; D000328:Adult; D000368:Aged; D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D009901:Optic Nerve Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D033081:Shear Strength