Comparison of Radiation Dose and Image Noise in Head Computed Tomography with Sequence and Spiral Techniques

Head CT Scan techniques in clinical can use sequence and spiral technique, but the problems is dose not been routinely recorded and noise have not been assessed. This study was to determine the profile value of radiation doses and image noise in sequence and spiral technique, and also relationship between SAFIRE-Head MSCT. Quasi-experimental research design with one group pretest-posttest method to determine the effect of reducing tube voltage (kVp) 130, 110, 80 to radiation doses and image noise within and without SAFIRE. Measurements of CTDIvol, TLD and image noise. Data was analysis by Anova test followed by post hoc test. The result, there is a difference dose and noise of the spiral and sequence techniques on all variations of tube voltage. Radiation dose increases according to tube voltage and the sequence technique gives a higher dose by CTDIvol. On TLD’s measurements, doses in the eyes and thyroid are lower when using spiral techniques. High value of tube voltage produced smaller image noise. The higher level of strange (S5) SAFIRE produced lower image noise. Examination with low tube voltage in spiral technique would be reduce radiation dose (CTDIvol). However, sequence technique reduce radiation dose at the eyes and thyroid gland.