Abstract

ANDISCO, D.; BLANCO, S.; BUZZI, A.  and  BALLESTER, S.. Interdisciplinary optimization of CT Protocols by modificating mAand controlling image noise. Rev. argent. radiol. [online]. 2010, vol.74, n.4, pp.397-402. ISSN 1852-9992.

Purpose: To determine the dose frequently used in computed tomography and to modify radiological parameters in order to optimize each protocol according to the dose administered. Materials and Methods: To determine the dose, measurements were made using a pencil ionization chamber, a dosemeter, a 16 cm PMMAhead phantom and a 32 cm abdominal phantom, and a water phantom. AGeneral Electric Hi Speed - Helical 120kV CT scanner was used. The doses usually administered and the noise in each of the studies were measured using these instruments. Agroup of technicians and radiologists at the institution have sought to reduce the dose of each protocol, while maintaining high quality diagnostic images. Results: Although the protocols previously carried out at the institution did not include large doses, the new doses currently used in all protocols could be reduced by 30% on average. Diagnostic quality was not neglected and the slight increase in noise level was harmless to the group of radiologists. Conclusion: CT protocol optimization is essential to reduce the dose administered to the patient. Neither diagnostic quality nor medical activity should be altered by changes in the technique, which must be carried out by a multidisciplinary team.

Keywords : Dosimetry; Radiological optimization; Radioprotection.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )