Hatem Alkadhi
We chose this topic because of our interest in lowering radiation doses from CT. Our machine was recently equipped with a tube that is able to switch down to 70 kVp. In addition, we noted that the tube potential selection software automatically chose a tube potential of 70 kVp when scanning the neck in some patients. After careful evaluation of these images, we found the quality of the cervical soft tissue to be equal—if not better—than that of our previous standard CT protocol with 120 kVp. Thus, we launched this study that confirmed our initial observations.
After conducting the study, we have changed our protocol settings for neck CT to 70 kVp in all patients, and as of yet have not experienced a reduction in image quality. By doing so, we could reduce the radiation dose by around 34% without a compromise in image quality.
We are currently pursuing studies to determine the protocol for the cervical spine with lowest radiation dose that still offers diagnostic image quality. In addition, one current focus of our research is aimed at the development and implementation of metal artifact reduction techniques in neck CT, including CT angiography of the carotids, to improve the image quality that often is reduced because of artifacts from dental prostheses.
We are expecting results and first papers from these studies at the end of this year.