1. B – SCAN ULTRASONOGRAPHY Dr. Parameshwar Rao Dr. Haridev Dr. Ashok Dr. Siva Kumar.W (PG)
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7. sound waves from transmitter Echoes are received by receiver Amplification Oscilloscope screen Target tissue
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12. INCREASE IN GAIN - INCREASE IN TISSUE PENETRATION AND SENSITIVITY – DECREASE IN RESOLUTION.
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23. The patient is either reclining on a chair or lying on a couch. The probe can be placed directly over the conjunctiva or the lids. Examination technique:
37. VITREOUS HAEMORRHAGE To detect extent, density, location and cause Fresh haemorrhage shows dots or lines Old haemorrhage the dots gets brighter
38. POSTERIOR VITREOUS DETACHMENT Posterior vitreous detachment: The detached posterior vitreous is seen as membranous lesion with no/some attachments to the optic disc
39. POSTERIOR VITREOUS DETACHMENT Mobility of PVD is more than RD. The spike of RD is more than PVD. PVD becomes more prominent in higher gain settings
40. RETINAL DETACHMENT The detachment produces a bright continuous, folded appearance with insertion into the disc and ora serrata. It is to determine the configuration of the detachment as shallow, flat or bullous
56. CHOROIDAL DETACHMENT KISSING CHOROIDS Smooth, thick, dome shaped membrane in the periphery with very little after movement 360 degree detachment shows a pathognomonic “scalloped appearance
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