Quantification of Posterior Globe Flattening : Methodology Development and Validation
- Author:
- Ebert, Douglas
- Published:
- February 15, 2012.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Hamilton, Douglas R., Lumpkins, Sarah B., Sargsyan, Ashot E., Garcia, Kathleen M., and Berggren, Michael D.
Online Version
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary:
- Microgravity exposure affects visual acuity in a subset of astronauts and mechanisms may include structural changes in the posterior globe and orbit. Particularly, posterior globe flattening has been implicated in the eyes of several astronauts. This phenomenon is known to affect some terrestrial patient populations and has been shown to be associated with intracranial hypertension. It is commonly assessed by magnetic resonance imaging (MRI), computed tomography (CT) or B-mode Ultrasound (US), without consistent objective criteria. NASA uses a semiquantitative scale of 0-3 as part of eye/orbit MRI and US analysis for occupational monitoring purposes. The goal of this study was ot initiate development of an objective quantification methodology to monitor small changes in posterior globe flattening.
- Other Subject(s):
- Collection:
- NASA Technical Reports Server (NTRS) Collection.
- Note:
- Document ID: 20120007655.
JSC-CN-25778.
NASA Human Research Investigators' Workshop; 14-16 Feb. 2012; Houston, TX; United States. - Terms of Use and Reproduction:
- Copyright, Distribution under U.S. Government purpose rights.
View MARC record | catkey: 15979757