Lawrenceburg, Kentucky. Lawrenceburg is a home rule-class city in Anderson County, Kentucky, United States. The population was 10,505 at the 2010 census. It is the seat of its county. Lawrenceburg is part of the Frankfort, Kentucky, micropolitan statistical area.
Vacuum phenomenon in the shoulder refers to the presence of intra-articular gas in the shoulder joint.t is a very common occurrence, particularly in external rotation. This can cause circular or linear areas of low signal intensity on GRE MR images of the shoulder obtained with external rotation of the arm and represent small foci of intra-articular gas.
The radiological findings of vacuum phenomenon with degenerative discs were described by Knutsson in 1942. Marr in 1955, found gas in the intervertebral disc in 2.036% of his cases, whereas Gershon-Cohen et al. found the vacuum phenomena in 20.8% of their cases. According to Gulati et al., the vacuum phenomenon is due to creation of space in a degenerative intervertebral or apophyseal joint due to motion, especially extension.