| Autor: |
Horton, PS, Sippy, FH, Nelson, JF, Kohout, FJ, Kienzle, GC |
| Zdroj: |
Journal of Dental Education; December 1983, Vol. 47 Issue: 12 p771-773, 3p |
| Abstrakt: |
This study was conducted to compare the type and frequency of cone‐cuts that occur with rectangular and cylindrical collimation in dental radiography. Thirty‐eight hundred radiographs, half made with cylindrical cones and half made with rectangular cones, were examined for major and minor cone‐cuts. A total of 156 cone‐cuts was found. Thirty‐three of these were of the major category, 86 percent of which occurred with rectangular collimation. Although cone‐cuts appeared much more frequently when a rectangular cone was used, a significant reduction in useless radiation makes this type of collimation a worthwhile consideration. |
| Databáze: |
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