Date

2019-03-07

Protocol

Protocol changed

Item Changed

Interventions (tube current value)

Previous Version

Study setting Department of Radiology- CNTH-Ragama. All eligible patients will be randomized to the intervention or control group using computer generated random numbers. Intervention group patients will be exposed to tube current value of 125 milliamperes (Ma). Control group will be exposed to manufacturer set default tube current value of 300 milliamperes (Ma) which is practiced currently. A radiographer will carry out the CT examinations in control and study groups. Helical CT will be performed parallel to cantho-meatal line from skull base to vertex. Hard copy CT films will be printed for each patient to use image quality analysis. Outcome assessors will be blinded to the intervention.

Next Version

Study setting Department of Radiology- CNTH-Ragama. All eligible patients will be randomized to the intervention or control group using computer generated random numbers. Intervention group patients will be exposed to tube current value of 130 milliamperes (Ma). Control group will be exposed to manufacturer set default tube current value of 300 milliamperes (Ma) which is practiced currently. A radiographer will carry out the CT examinations in control and study groups. Helical CT will be performed parallel to cantho-meatal line from skull base to vertex. Hard copy CT films will be printed for each patient to use image quality analysis. Outcome assessors will be blinded to the intervention.