A new type of cross-hatched wedged grid for biplanar serial angiography of the abdomen.
In an attempt to obtain an improved image in serial abdominal angiography, two new types of linear and cross-hatched grids were designed, called respectively the wedged grid and cross-hatched type of wedged grid. The grid ratio of the wedged grid ranges continuously from 12:1 to 8:1 from edge to edge. The cross-hatched wedged grid is a combination of two grids. The upper part is a linear wedged grid with a grid ratio ranging from 12:1 to 5:1. The lower part is a linear grid with a grid ratio of 5:1. The individual grids are placed at right angles to each other. Hence, the grid ratio of this combination ranges from 17:1 to 10:1. By using the special cross-hatched wedged grid, satisfactory biplanar abdominal angiography can be performed without significantly increasing radiation dosage.
D000792:Angiography / Q000295:instrumentation*; D006801:Humans; D008961:Models, Structural; D011860:Radiography, Abdominal; D013679:Technology, Radiologic