Thickness measurements.

Cerebral Cortical Thickness Measurements

Variability in subfoveal choroidal thickness measurements.

The recent report by Rahman et al. describing subfoveal choroidal thickness (SFCT) measurements was interesting to read and raised several questions that further interpretation of their data may answer. The range of thicknesses (OD 172–550 m; OS 142–563 m) seems surprisingly large for the age range of their study participants. Using the formula for age-adjusted SFCT measurements of Margolis and...

Voxel-based cortical thickness measurements in MRI

The thickness of the cerebral cortex can provide valuable information about normal and abnormal neuroanatomy. High resolution MRI together with powerful image processing techniques has made it possible to perform these measurements automatically over the whole brain. Here we present a method for automatically generating voxel-based cortical thickness (VBCT) maps. This technique results in maps ...

In vitro enamel thickness measurements with ultrasound.

In the work described here, agreement between ultrasound and histologic measurements of enamel thickness in vitro was investigated. Fifteen extracted human premolars were sectioned coronally to produce 30 sections. The enamel thickness of each specimen was measured with a 15-MHz hand-held ultrasound probe and verified with histology. The speed of sound in enamel was established. Bland-Altman an...

Retinal thickness measurements with optical coherence tomography and the scanning retinal thickness analyzer.

PURPOSE To assess the reproducibility of retinal thickness measurements in normal subjects and to compare foveal thickness using optical coherence tomography (OCT) and the scanning retinal thickness analyzer (RTA). METHODS Two examiners performed foveal thickness measurements in 24 eyes of 12 healthy subjects using both OCT and the scanning RTA. Intraclass correlation coefficients (ICC) (intr...