No significant changes of the edge position or white line intensity were observed within a series of repeated scans; radiation damage or photo reduction is not considered as a critical issue under the present conditions.
Despite the tremendous benefits of CT scans, radiation dose from CT scans may be a potential risk factor for cancer development.
For every 1,000 people undergoing a cardiac CT scan, the radiation adds one extra case of cancer to the 420 that would normally occur.
"For anything else," he said, handing over a small cardboard box containing a Geiger counter, "I always scan for radiation".
Ground-glass attenuation noted on HRCT scan suggested radiation pneumonitis and steroid therapy was started.
However, one patient refused post-treatment TAVS scans; in one patient, no CT scan in radiation treatment position was available, and in one patient, co-registration with SPECT was unsuccessful due to misalignment because no immobilisation mask and no tongue depressor could be used during SPECT due to pain (Fig. 1).
CT scanning for radiation therapy planning differs from diagnostic CT scanning.
Although CT scanning presents challenges (lack of uniformity of scanner technical characteristics, scanning protocols, radiation dosing, scoring of emphysema severity/distribution, etc)., computerized approaches to process and analyze chest CT scans may be useful in harmonizing CT scan data, and will likely assist in refinement of COPD subtypes.
CT scans have radiation risks and sometimes detect cancers that would not have progressed, leading to risky procedures like biopsies and lung surgery when not needed.
