"CTDI100 (mGy) is a linear measure of dose distribution over a pencil ionisation chamber and hence does not take into consideration the topographical variation of a human body and is therefore not in clinical use"
"CTDIw (mGy) is closer to the human dose profile as compared with the CTDI100"
"CTDIvol (mGy) is obtained by dividing CTDIw by pitch factor"
"DLP (mGy*cm) = CTDIvol x scan length"
"If the AP and lateral dimensions of the patient are available, then the SSDE can be used to estimate the absorbed dose."
"If the AP and lateral dimensions of the patient are available, then the SSDE can be used to estimate the absorbed dose."
"CT dose index (CTDI) (measured in mGy) is a standardised measure of radiation dose output of a CT scanner which allows the user to compare radiation output of different CT scanners. It is rather a calculated value, not a directly measureable value. In the past CTDI100 (measured over a 100 mm long ionisation chamber) and CTDIw (weighted average of dose across a single slice) were used; for helical scanners in current use, the parameter CTDIvol is the more commonly used index."
"CT dose index (CTDI) (measured in mGy) is a standardised measure of radiation dose output of a CT scanner which allows the user to compare radiation output of different CT scanners. It is rather a calculated value, not a directly measureable value. In the past CTDI100 (measured over a 100 mm long ionisation chamber) and CTDIw (weighted average of dose across a single slice) were used; for helical scanners in current use, the parameter CTDIvol is the more commonly used index."