UBM Ultrasound Biomicroscopy - PowerPoint PPT Presentation

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UBM Ultrasound Biomicroscopy

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  1. UBMUltrasound Biomicroscopy

  2. Ultrasound biomicroscopy is a new imaging technique that uses high frequency ultrasound to produce images of the eye at near microscopic resolution

  3. Basic of ultrasound biomicroscopy • Is based on 40 to 100 MHZ transduceres incorporated into a B- mode clinical scanner • Image resolution is approximately 50 μm • Reduced depth of penetration to approximately 5 mm

  4. Quantitative studies includes Simple measurements methods such as a) Distance b) Angle measurement

  5. Measurement of the AC depth

  6. Measurement of AC angle

  7. Qualitative analysis include : 1) Pathophysiology of anterior segment disorders 2) Mechanism of appositional angle closure

  8. The cornea • Glaucoma • Tumors • IOLs • Ocular adnexa • The sclera • Trauma

  9. CORNEA

  10. CORNEA: • Internal corneal details • the depth of abnormalities

  11. Penetrating keratoplasty

  12. GLAUCOMA

  13. PUPILLARY BLOCK

  14. effect of illumination on angle configuration

  15. LASER IRIDOTOMY

  16. Plateau iris: • Anatomically anterior position of the ciliaryprocesses • Large ciliary process • Medium depth of AC • Slightly convex of iris surface

  17. PLATEAU IRIS

  18. PERIPHERAL IRIDOPLASTY

  19. MALIGNANT GLAUCOMA: • Shallow supraciliarydetachmen • Anterior rotation of ciliary body • Aqueous humor is secreted posterior to the lens

  20. malignantglaucoma

  21. Reverse pupillary block (pigmentary glaucoma) • Concave configuration of midperipheral iris • Large iris • Posteriorly insertion of iris

  22. PIGMENTARY GLAUCOMA

  23. CYSTIC ANGLE CLOSURE

  24. UGH SYNDROME

  25. Anterior synechiae

  26. INTRAOCULAR TUMORS

  27. Tumors: • Iris tumors, ciliary body tumors and anterior choroidal tumors can be imaged • Borders of the tumor are usually detectable by the change in reflectivity from surrounding structures

  28. CILIARY BODY TUMOR

  29. Extra-scleral extension

  30. CHOROIDAL TUMORS

  31. IRIDO-CILIARY CYST

  32. INTRAOCULAR LENSES

  33. WOUND LEAKS

  34. OCULAR ADNEXA

  35. CONJUNCTIVAL MELANOMA