Bibliographic Details
| Title: |
Exposure Dose Reduction of Lead Acrylic Filter for Gastric Cancer Mass Screening. |
| Authors: |
Kim, Sun I., Suh, Tae Suk, Magjarevic, R., Nagel, J. H., Yamamoto, Kenyu, Katsuda, T., Kuroda, C., Takeshita, M., Kuwano, T., Yatake, H., Kubo, T., Yamazaki, H., Azuma, M. |
| Source: |
World Congress on Medical Physics & Biomedical Engineering 2006; 2007, p2168-2171, 4p |
| Abstract: |
It is important to reduce x-ray exposure in subjects who undergo mass screening for gastric cancer. We constructed three types of lead acrylic filters and evaluated their ability to reduce exposure. X-ray tube load increase, dose area reduction, density of gastric phantom images and lead acrylic filter shadows were evaluated. Three different thicknesses of lead acrylic filters were examined, one was a regular thickness, another was half the thickness, and the other was twofold the thickness. Objectivization, reduction rate of exposure, x-ray tube load increase, and the density of each gastric phantom image was taken with or without the three types of lead acrylic filters. The filter shadow in the image of the gastric phantoms using the three types of lead acrylic filters were evaluated with 4 levels. Dose area reductions using the three types of filters were 6.03%, 10.92%, and 13.64%, for the half thickness, regular thickness, and twofold thickness, respectively (p<0.05). The x-ray tube load increases using the three types of filters were 2.67%, 5.61%, and 4.99%, respectively (p>0.05). There was no significant difference between the density of gastric phantom images with or without the filters (p>0.05). The lead acrylic filter shadows were significantly difference among the three types filters (p<0.05). We conclude that the use of lead acrylic filters is effective for the reduction of exposure in screening for gastric cancer. A lead acrylic filter of twofold thickness is most effective for the reduction of exposure. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
