Three-Dimensional Ultrasound of Ophthalmic Pathologies

Abstract

Purpose: To assess three-dimensional echography image quality and multiplanar imaging for the visualization of vitreoretinal and choroidal diseases. Methods: In an observational cross-sectional study, 20 eyes of 20 patients presenting different vitreoretinal and choroidal pathologies have been evaluated with three-dimensional ultrasonography (3DUS). Results: Of the 20 eyes, an epiretinal membrane was present in 2 eyes, diabetic macular edema in 6, a macular hole in 2, a myopic posterior detachment in 2, myopic peripapillary detachment of the pigment epithelium in 1, choroidal melanoma in 4, optic nerve glioma in 1 case, carotidocavernous fistula in 1 and an intravitreal dislocation of an intraocular lens in 1 eye. 3DUS was effective in wide-field representation of the vitreoretinal interface during macular edema, in good-quality visualization of the dislocated intraocular lens and in calculating the volume of choroidal melanoma. No advantages were found in other evaluated cases if compared with the already existing imaging techniques. Conclusions: One of the main advantages of 3DUS was the possibility to obtain a wide-field representation of spatial relationships between the lesions and the surrounding ocular structures.

Papilledema as a diagnostic challenge — report of three cases

“…Some of these procedures may have an important role in a differential diagnosis. USG, OCT, and CT in diagnosis of the optic disc drusen versus papilledema, and CT and MRI schwannoma versus glioma [27][28][29][30]. Regardless, we emphasize the crucial role the ophthalmologist can play in the early diagnosis of CNS neoplasia [29,30].…”

Die dreidimensionale sonographische Untersuchung des Vogelauges

“…Durch Eigenbewegung oder durch Bewegung des wachen Patienten kam es zu sogenannten Erfassungsartefakten, die durch eine Verkürzung der Scanzeit vermindert werden könnten (5). In der Humanmedizin werden hierzu Ultraschallsysteme verwendet, mit denen sich 40 Einzelschnitte pro Sekunde anfertigen lassen, wodurch Scanzeiten von weniger als 5 Sekunden pro Auge erreicht werden (6).…”

“…Vergleichsangaben zur Dauer einer dreidimensionalen sonographischen Untersuchung des Vogelauges sind in der Literatur nicht zu finden. Auch in der Humanophthalmologie wird von einer kürzeren Untersuchungsdauer der dreidimensionalen Sonographie berichtet, da die restlichen Ebenen vom Computer berechnet werden und die Auswertung der Daten ohne Patientenkontakt geschieht (6).…”

Imaging Modalities for Uveal Melanoma

“…In contrast, 3D-USG collects echographic data from a large series of 2D-USG images that are quickly acquired and assembled using a computer algorithm. The resulting 3D images can be rotated, sliced or viewed in different planes 7. Tumour biometry using 3D-USG in 42 patients with choroidal melanoma found this technique to be as reproducible as clinical examination and standard USG for measuring tumour diameter and height.…”