CT definition of the surgical apex in the orbit
| Autor: | Yael Redler, Daniel Briscoe, Adi Orbach, Ziv Neeman, Olga Zurinam, Dmitry Lumelsky, Christine Safieh |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
Orbital space genetic structures Science Diseases Article Volume depletion 03 medical and health sciences Medical research 0302 clinical medicine Optic Nerve Diseases Humans Medicine Retrospective Studies Optic nerve compression Multidisciplinary business.industry Health care eye diseases Apex (geometry) medicine.anatomical_structure Neurology Oncology Risk factors 030221 ophthalmology & optometry Optic nerve sense organs Anatomy Tomography X-Ray Computed business Nuclear medicine Orbit Health occupations 030217 neurology & neurosurgery Orbit (anatomy) Orbital apex Volume (compression) |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | The orbital apex is an undefined but well understood concept of Orbital Surgeons. We sought to determine the surgical apex area specifically where the volume ratio decreases significantly impacting on the optic nerve. A retrospective analysis using PACS program processing, measured the right retrobulbar space volume changes in 100 randomly selected cases without orbital pathology where CT was performed for non-ophthalmic indications. Volume of the retrobulbar space was measured between two recognizable landmarks. The first landmark being the point of exit of the optic nerve from the eye and the second landmark the optic nerve's point of exit from the orbit. The measured length between these two points was divided into five equal segments, V1-V5. The volumes of all 5 segments were compared and the most significant area of volume depletion was established. The mean numeric value of measured orbital volumes was compared. A ratio difference of V1/V2 was less than 2, V2/V3 was 2.32 (± 0.27), V3/4 was 3.24 (± 0.39), and V4/V5 was 5.67 (± 1.66). The most remarkable difference in ratio was between V4 and V5 (mean 5.67 ± 1.66 with p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink