Dose reduction

Pelvis

Infants

Children

The purpose of this article was determine the dependence of three-dimensional computed tomography (3D CT) images on absorbed dose in pediatric patients. While plain radiographs are often used as part of the initial evaluation of patients with congenital hip dislocation, it is well known that the performance of 3 D CT may be necessary for a more complete evaluation. It is because of special anatomical views, such as latelal views of the hip joints, that can be evaluated at 3D CT, cannot be seen at plain radiography. But absorbed dose of the reprodactive organs of 3D CT is high compared with one of plain radiography. Typical manufactures preprogrammed protocols for 3D CT examinations were designed to produce images with low image noise and with high absorbed dose of organs. The low-dose technique that made use of lower milliampare second in the same incrimental manner, could produce 3D CT images that was diagnostically acceptable but that slightly decreased in volume. This low dose technique could make 3D CT images of pediatric pelvis with maintained diagnostic quality at 60% reduction in absorbed dose.