orbita, globo ocular, la conjuntiva capsula de tenon paredes orbitarias: superior ( techo): formada por el hueso frontal en su profundidad el ala menos del. Non-contrast CT is useful in the initial evaluation of orbital and globe trauma for the assessment of fractures, extra-ocular muscle herniation and. Aug 30, · “El torero Juan José Padilla sufre estallamiento de glóbulo ocular por cornada” EfektoTV Deportes: – Duration: Efekto Televisión 1,,
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Fundoscopy facilitates detection of retinal detachments, while contrast-enhanced MRI plays an essential role in the assessment of an underlying cause such as a neoplasm. On MR and CT, posterior vitreous detachment appears as a membrane within the vitreous cavity detached from the optic disc and attached at the ora serrata.
Majority of eye globe imaging is performed secondary to CT and MRI imaging of the brain for various reasons ranging from trauma to neoplasia.
Journal List Korean J Radiol v. Approximate position of ora serrata is shown small white arrowheads. This structure provides nourishment to the retina 4. Medial lesion shows contrast enhancement. Accelerated vitreous degeneration may result from trauma, inflammation endophthalmitis or significant myopia 1. Inflammation of the uveal tract commonly involves the adjacent retina and sclera Fig.
No history of trauma was noted. Vascular neoplasms of the choroid are uncommon benign lesions usually seen in the second and third decades. The appearance of melanoma is non-uniform on imaging due to the varying levels of melanin. Arch Pathol Lab Med. Axial non-contrast image from brain CT assessment of altered mental state.
Endophthalmitis Endophthalmitis represents inflammation or infection involving the anterior chamber and vitreous humour. Axial non-contrast enhanced image from orbital CT study on patient with history of Wegener’s granulomatosis with posterior scleritis. Uveal melanomas are much less common than the cutaneous form. Likewise, enhancing lesion suggestive of neoplastic cause is absent.
An understanding of the CT attenuation and MRI signal characteristics can also help in characterising the lesions, especially in the case of uveal melanoma. Cavernous malformations may be associated with Sturge-Weber syndrome, and can be complicated by retinal tears and detachment.
Oculag T2W image from orbital MRI study for evaluation of left visual loss shows left sided lens dislocation lens luxation with hypointense lens lying dependently adjacent to retina in posterior vitreous humour.
Subretinal fluid accumulation can occur in nonrhegmatogenous detachments secondary to underlying neoplasms and hemorrhage. Retina and choroid appear as single hyperintense layer white arrow with enhancement on fat-saturated post contrast T1W image Cwhite arrow. Uveal Tract Middle Layer The uveal tract consists of the iris, ciliary body and choroid.
The retina is the innermost sensory layer of the globe and consists of two layers. Eye, orbit and visual system. The various pathological processes involving these layers are highlighted using case examples with fundoscopic correlation where appropriate.
corrida toreador – ZICC
Table 1 shows the common MRI characteristics of the various structures in the globe. Scleral bands would appear more linear, as compared to punctate calcifications observed.
The globe consists of three primary layers: Hypointense-can estallamienot highlighted by an overlying T1W hyperintense tear film.
Amelanotic tumors have a similar appearance to other neoplasms on MRI. Received Aug 23; Accepted Jun 5. The iris is a pigmented circular structure responsible for controlling etsallamiento size of the pupil.
Lens black arrow and sclera white arrow show hypointense signal on all sequences. Other scleral findings include scleral banding for treatment of retinal detachment Figs. The distinction between choroidal and retinal detachment is not always possible with MRI despite several known patterns. Support Center Support Center. Ocular Metastases The vascular uveal tract is the most common site for hematogenously disseminated metastases within the globe Fig.
Ciliary bodies form part of choroid dashed white arrows, B, C. Malignant melanoma represents the most common intraocular malignancy in adults and occurs in the pigmented uveal tract 3. Axial non-contrast image from brain CT for assessment of direct globe injury shows left globe rupture with complete loss of normal scleral contour, vitreous hemorrhage and surrounding periorbital and episcleral hematomas.
The sclera merges with the cornea at the limbus anteriorly. However, characteristic concavity at site of banding is not seen in this case.
ALVARO LÓPEZ / LUPITA LÓPEZ TORERA
Anteriorly, choroidal detachments commonly extend into the ciliary body, whereas, retinal detachments are limited by the ora serrata. Corresponding photograph shows pigmented lesion arising from inferomedial globe wall with surrounding hemorrhage. The sclera is enveloped by the fibroelastic Tenon’s capsule, which fuses with the bulbar conjunctiva and is perforated posteriorly by the optic nerve sheath.
No choroidal detachment is estallsmiento. Bilateral bands of hyperdensity that do not conform to insertions of extra-ocular muscles, are consistent with prior bilateral scleral bands for treatment of retinal detachment. Axial T1W image of right globe. CT is the technique of choice for evaluating metallic or paramagnetic foreign bodies, whereas MRI is contraindicated due to potential migration and local heating. These calcifications represent normal part of aging.