PURPOSE: The aim of this study was to assess the feasibility of low-dose computed tomography (CT) with the adaptive statistical iterative reconstruction (ASIR) algorithm in whole-body imaging with low tube voltage and current. MATERIALS AND METHODS: Twenty-three patients underwent whole-body CT with 40% of ASIR and parameters modulated according to body mass index (BMI). All had previously undergone conventional-dose CT with 100% filtered back projection (FBP). Two radiologists jointly assessed image quality (sharpness, noise, artefacts) and diagnostic quality blinded to the scanning technique. The effective dose and image quality obtained with the ASIR protocol were compared with those obtained with the FBP algorithm. RESULTS: The mean effective dose achieved with ASIR was 15.6 ± 5 mSv versus 21.8 ± 5.3 mSv with the FBP protocol (p<0.0001). Image quality was good in all low-dose CT scans, and diagnostic quality was comparable with or superior to that of conventional-dose CT. CONCLUSIONS: Low-dose CT with the ASIR algorithm is feasible and ensures significant reduction in effective dose.
Romagnoli, A., Funel, V., Meschini, A., Ricci, A., Arduini, S., Caramanica, C., et al. (2012). Optimisation of low-dose CT with adaptive statistical iterative reconstruction in total body examination. LA RADIOLOGIA MEDICA, 117(8), 1333-1346 [10.1007/s11547-012-0897-3].
Optimisation of low-dose CT with adaptive statistical iterative reconstruction in total body examination
ROMAGNOLI, ANDREA;SIMONETTI, GIOVANNI MARIA EGISTO
2012-01-01
Abstract
PURPOSE: The aim of this study was to assess the feasibility of low-dose computed tomography (CT) with the adaptive statistical iterative reconstruction (ASIR) algorithm in whole-body imaging with low tube voltage and current. MATERIALS AND METHODS: Twenty-three patients underwent whole-body CT with 40% of ASIR and parameters modulated according to body mass index (BMI). All had previously undergone conventional-dose CT with 100% filtered back projection (FBP). Two radiologists jointly assessed image quality (sharpness, noise, artefacts) and diagnostic quality blinded to the scanning technique. The effective dose and image quality obtained with the ASIR protocol were compared with those obtained with the FBP algorithm. RESULTS: The mean effective dose achieved with ASIR was 15.6 ± 5 mSv versus 21.8 ± 5.3 mSv with the FBP protocol (p<0.0001). Image quality was good in all low-dose CT scans, and diagnostic quality was comparable with or superior to that of conventional-dose CT. CONCLUSIONS: Low-dose CT with the ASIR algorithm is feasible and ensures significant reduction in effective dose.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
