𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The sonolucent “light bulb” sign of fluid collections

✍ Scribed by Melvyn R. Conrad; Roger C. Sanders; A. Everette James Jr.

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
566 KB
Volume
4
Category
Article
ISSN
0091-2751

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The recent introduction of gray scale ultrasound, which uses a higher power output, has made it more difficult to assess the cystic or solid nature of sonolucent mass lesions using the criteria developed for bistable imaging, i.e. the amount of through transmission and the strength of the posterior wall echo. However, a cyst may be reliably diagnosed if a totally echofree area is seen adjacent to an area with low‐level echoes derived from tissue parenchyma. We have termed this the “light bulb sign.” Visualization of the sign facilitates the decision of the optimal time for abscess drainage.

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