Glabelloalveolar Line
GAL, an imaginary line from the glabella to the anterior aspect of the alveolar process of the maxilla.
View ArticleGrid Ratio
A ratio comparing the height of lead lines in an x-ray grid to the distance between the lead strips
View ArticleGERD
Gastroesophageal reflux disease, or esophageal reflux, an emptying of stomach contents into the esophagus causing irritation. Also known as heartburn.
View ArticleGrid Cut-Off
A partial distortion and grainy appearance of the image resulting from the primary beam being angled into the lead strips of the grid.
View ArticleGrid Conversion Factor
GCF, or Bucky Factor, a ratio of patient dose with a grid and without a grid. It measures the penetration of primary and secondary radiation with and with out a grid.
View ArticleGrid
A device used to reduce scatter radiation and improve the quality of radiographs. Made up of thin lead strips and plastic interspaces, it absorbs out of focus photons.
View ArticleGray
Gy, or rad, radiation absorbed dose. 1 joule (J) of energy absorbed in each kilogram of material.
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