Abstract
We evaluated high-resolution magnetic resonance imaging (MR) using a 47-mm microscopy surface coil in comparison to 16-slice multislice CT (MSCT) for postsurgical imaging of reconstructed orbital walls. Twenty-five patients with 27 internal orbital wall fractures were imaged prospectively after reconstruction with resorbable polydioxanone sulfate (PDS) sheets. Coronal high-quality T1- and T2-weighted MR images were obtained with an in-plane resolution of 350 μm within a measure time of 6–7 min for each sequence. Nineteen symptomatic patients underwent MSCT as the current gold standard. In MRI the PDS foil appears in T1- and T2-weighted images as a thin, low-signal-intensity linear structure. In CT it appears hyperdense in comparison to soft tissue and slightly hypodense in comparison to cortical bone. PDS foils could be clearly depicted in 20 out of 25 patients (80%) with MRI and in 13 out of 19 patients (68%) with MSCT. An inadequate foil position or size could be diagnosed in eight patients with MRI and in only three patients with MSCT. In ten symptomatic patients secondary surgery could be avoided because of regular MRI findings except mild hematoma and muscle edema. High-resolution MRI of the orbit using a 47-mm microscopy coil is a promising method to accurately demonstrate normal and pathologic conditions in symptomatic patients after orbital wall reconstruction with PDS foils.
Similar content being viewed by others
References
Mack MG, Balzer JO, Herzog C, Vogl TJ (2003) Multi-detector CT: head and neck imaging. Eur Radiol 13(5):121–126
Gorospe L, Royo A, Berrocal T, Garcia-Raya P, Moreno P, Abelairas J (2003) Imaging of orbital disorders in pediatric patients. Eur Radiol 13(8):2012–2026
Manfre L, Nicoletti G, Lombardo M, Consoli V, Pero G, Albanese V (1993) Orbital “blow-in” fracture: MRI. Neuroradiology 35(8):612–613
Jin HR, Shin SO, Choo MJ, Choi YS (2000) Relationship between the extent of fracture and the degree of enophthalmos in isolated blowout fractures of the medial orbital wall. J Oral Maxillofac Surg 58(6):617–620
Mathog RH (1991) Management of orbital blow-out fractures. Otolaryngol Clin North Am 24(1):79–91
Merten HA, Luhr HG (1994) Resorbable synthetics (PDS foils) for bridging extensive orbital wall defects in an animal experiment comparison. Fortschr Kiefer- Gesichts-Chir 39:186–190
Imhof H, Schibany N, Ba-Ssalamah A, Czerny C, Hojreh A, Kainberger F, Krestan C, Kudler H, Nobauer I, Nowotny R (2003) Spiral CT and radiation dose. Eur J Radiol 47(1):29–37
Lemke AJ, Hosten N, Foerster PI, Foerster MH (2001) Using high resolution sectional imaging in diagnosis of the eye and orbit. Ophthalmologe 98(5):435–445
Kontio R, Suuronen R, Salonen O, Paukku P, Konttinen YT, Lindqvist C (2001) Effectiveness of operative treatment of internal orbital wall fracture with polydioxanone implant. Int J Oral Maxillofac Surg 30(4):278–285
Bianchi J, Goggins W, Rudolph M (2000) In vivo, thyroid and lens surface exposure with spiral and conventional computed tomography in dental implant radiography. Oral Surg Oral Med Oral Pathol Oral Radiol Endo 90(2):249–253
Zammit-Maempel I, Chadwick CL, Willis SP (2003) Radiation dose to the lens of eye and thyroid gland in paranasal sinus multislice CT. Br J Radiol 76(906):418–420
Zhan Y, Engel M, Kujat C, Backens M, Kubale R, Kramann B (1995) Proton spin tomography of the orbit in post-traumatic motility disorders. Rofo Fortschr Geb Rontgenstrahlen Neuen Bildgeb Verfahr 163(2):127–133
Jank S, Emshoff R, Schuchter B, Strobl H, Brandlmaier I, Norer B (2003) Orbital floor reconstruction with flexible Ethisorb patches: a retrospective long-term follow-up study. Oral Surg Oral Med Oral Pathol Oral Radiol Endo 95(1):16–22
Czechowski J, Janeczek J, Kelly G, Johansen J (2001) Radiation dose to the lens in sequential and spiral CT of the facial bones and sinuses. Eur Radiol 11(4):711–713
Okinaka Y, Hara J, Takahashi M (1999) Orbital blowout fracture with persistent mobility deficit due to fibrosis of the inferior rectus muscle and perimuscular tissue. Ann Otol Rhinol Laryngol 108(12):1174–1176
Hawes MJ, Dortzbach RK (1983) Surgery on orbital floor fractures. Influence of time of repair and fracture size. Ophthalmology 90(9):1066–1070
Olsen RV, Munk PL, Lee MJ, Janzen DL, MacKay AL, Xiang QS, Masri B (2000) Metal artifact reduction sequence: early clinical applications. Radiographics 20(3):699–712
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wiener, E., Kolk, A., Neff, A. et al. Evaluation of reconstructed orbital wall fractures: high-resolution MRI using a microscopy surface coil versus 16-slice MSCT. Eur Radiol 15, 1250–1255 (2005). https://doi.org/10.1007/s00330-005-2660-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00330-005-2660-x