Advanced abdominal imaging with dual energy CT is feasible without increasing radiation dose

Le résumé fourni par la source

100 patients (62y (± 14)) had either SECT (44) or DECT (56) in clinical routine. Computed tomography dose index (CTDI vol ), dose length product (DLP) and CTDI normalised to amount of contrast media (CTDIn) were reported. CTDIvol was transformed to patient specific dose estimate (SSDE). Image noise (SD) was recorded as the mean measurement of three ROIs placed in subcutaneous fat and was normalised to absorbed dose by . Statistical significance was tested with two-sided t test (α < 0.05). There was no significant difference of the reported parameter between DECT and SECT: mean DECT- CTDI vol was 14.2 mGy (±3.9), mean SECT-CTDI vol 14.3 mGy (±4.5). Mean DECT-DLP was 680 mGycm (±220), mean SECT-DLP 665 mGycm (±231). Mean CTDIn was for both DECT and SECT 0.11 mGy/ml (±0.02). Mean DECT-SSDE was 15.7 mGy (±1.9), mean SECT-SSDE 16.1 mGy (±2.5). Mean DECT-SDn was 42.2 HU*√mGy (±13.9), mean SECT-SDn 47.8 HU*√mGy (±14.9). Advanced abdominal imaging with DECT is feasible without increasing radiation dose. This is of special interest in oncology, where targeted therapies demand more than simple size measurements. Functional information from dual energy CT will, without dose penalty, contribute to sophisticated oncological imaging.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.