Differences in radiation dosage value (CTDIw) and image noise on sequence and spiral engineering in computer tomography face bone (study on modality of scan brand Siemens 6 slice)

This Research use parameter of exposure factor are tube current and time (mAs) of CT scan for measuring dose radiation (CTDIw) and image noise with sequence and spiral techniques. The purpose of this research is to know difference of radiation dose (CTDIw) and image noise with sequence and spiral techniques of variation mAs at CT Scan Siemens 6 slice. This research was an experimental study. A five various use of mAs (from 250 mAs up to 290 mAs) and then effect of radiation doses (CTDIw) and image noise due to the techniques being implemented were compared and measured with tested to use paired T-Test to take a conclusion with trust storey level 95 % (ρ value <0,05). That having meaning that there is difference of dose value at sequence and spiral techniques, while test of Wilcoxon at show image noise assess significantly with ρ value equal to 0,000 (ρ value <0,05). It means there are difference of noise image between of sequence and spiral techniques. (author)