J Korean Radiol Soc.  1981 Jun;17(1):54-61. 10.3348/jkrs.1981.17.1.54.

Evaluation of normal brain CT scan in Koreans

• Lee YH
• Suh JH
• Park CY

• KMID: 2463419
• DOI: http://doi.org/10.3348/jkrs.1981.17.1.54

Abstract

The safety of procedure combined with wealth of information have resulted in rapid acceptance of CT as apractical and reliable neurodiagnostic technique. To understand the alternation in tissue density and associateddisplacement and distortion caused by pathologic lesion in CT, it is necessary to have clear understanding ofnormal anatomical landmark. For the purpose of establishing normartive critieria in Koreans for comparativediagnosis, 500 normal CT scan without neurologic sign were studied. The brief results are follows; 1. Among manyventricular index measured for lateral ventricle, the bifrontal CVI is more sensitive and easily determined.Ventricular size increased with age, especially after 6th decade but no difference with sex. 2. Mean width ofthird ventricle is 5mm(±0.3), more wider in male (male ; 5.2mm. female; 4.5mm) and increased with age. 3. Meanwidth of fourth ventricle is 13mm(±1.3), without difference in age and sex. The shape of ventricle is variableform of triangle. The position of ventricle relative to Twining's line can be determined, so ratio of destancefrom tuberculum sellae to center of fourth ventricle to Twninig's line is between 0.46-0.52. 4. Suprasellarcistern is visible in 89.7% of scan and shape of cistern is found to be pentagonal (73.3%), hexagonal (23.0%) andtetragonal (3.7%). 5. Choroid plexus can be identified in 90% and asymetrical in 4%, 45% of identified choroidplexus can be visible on scan without contrast enhancement, and more frequently visible in older age.

MeSH Terms

Brain*
Choroid Plexus
Female
Fourth Ventricle
Humans
Lateral Ventricles
Male
Neurologic Manifestations
Tomography, X-Ray Computed*