BACKGROUND: Advanced multidetector CT systems facilitate volumetric image acquisition, which offers theoretic dose savings over helical acquisition with shorter scan times. OBJECTIVE: Compare effective dose (ED), scan duration and image noise using 320- and 64-detector CT scanners in various acquisition modes for clinical chest, abdomen and pelvis protocols. MATERIALS AND METHODS: ED and scan durations were determined for 64-detector helical, 160-detector helical and volume modes under chest, abdomen and pelvis protocols on 320-detector CT with adaptive collimation and 64-detector helical mode on 64-detector CT without adaptive collimation in a phantom representing a 5-year-old child. Noise was measured as standard deviation of Hounsfield units. RESULTS: Compared to 64-detector helical CT, all acquisition modes on 320-detector CT resulted in lower ED and scan durations. Dose savings were greater for chest (27-46%) than abdomen/pelvis (18-28%) and chest/abdomen/pelvis imaging (8-14%). Noise was similar across scanning modes, although some protocols on 320-detector CT produced slightly higher noise. CONCLUSION: Dose savings can be achieved for chest, abdomen/pelvis and chest/abdomen/pelvis examinations on 320-detector CT compared to helical acquisition on 64-detector CT, with shorter scan durations. Although noise differences between some modes reached statistical significance, this is of doubtful diagnostic significance and will be studied further in a clinical setting.
BACKGROUND: Advanced multidetector CT systems facilitate volumetric image acquisition, which offers theoretic dose savings over helical acquisition with shorter scan times. OBJECTIVE: Compare effective dose (ED), scan duration and image noise using 320- and 64-detector CT scanners in various acquisition modes for clinical chest, abdomen and pelvis protocols. MATERIALS AND METHODS: ED and scan durations were determined for 64-detector helical, 160-detector helical and volume modes under chest, abdomen and pelvis protocols on 320-detector CT with adaptive collimation and 64-detector helical mode on 64-detector CT without adaptive collimation in a phantom representing a 5-year-old child. Noise was measured as standard deviation of Hounsfield units. RESULTS: Compared to 64-detector helical CT, all acquisition modes on 320-detector CT resulted in lower ED and scan durations. Dose savings were greater for chest (27-46%) than abdomen/pelvis (18-28%) and chest/abdomen/pelvis imaging (8-14%). Noise was similar across scanning modes, although some protocols on 320-detector CT produced slightly higher noise. CONCLUSION: Dose savings can be achieved for chest, abdomen/pelvis and chest/abdomen/pelvis examinations on 320-detector CT compared to helical acquisition on 64-detector CT, with shorter scan durations. Although noise differences between some modes reached statistical significance, this is of doubtful diagnostic significance and will be studied further in a clinical setting.
Authors: Sang Il Choi; Richard T George; Karl H Schuleri; Eun Ju Chun; Joao A C Lima; Albert C Lardo Journal: Int J Cardiovasc Imaging Date: 2009-03-03 Impact factor: 2.357
Authors: Di Zhang; Ali S Savandi; John J Demarco; Chris H Cagnon; Erin Angel; Adam C Turner; Dianna D Cody; Donna M Stevens; Andrew N Primak; Cynthia H McCollough; Michael F McNitt-Gray Journal: Med Phys Date: 2009-03 Impact factor: 4.071
Authors: Emily M DeBoer; Waldemar Swiercz; Sonya L Heltshe; Margaret M Anthony; Paul Szefler; Rebecca Klein; John Strain; Alan S Brody; Scott D Sagel Journal: Chest Date: 2014-03-01 Impact factor: 9.410
Authors: Sun Kyung Jeon; Young Hun Choi; Jung-Eun Cheon; Woo Sun Kim; Yeon Jin Cho; Ji Young Ha; Seung Hyun Lee; Hyejin Hyun; In-One Kim Journal: Pediatr Radiol Date: 2018-02-15
Authors: Przemysław Bombiński; Michał Brzewski; Stanisław Warchoł; Agnieszka Biejat; Marcin Banasiuk; Marek Gołębiowski Journal: Pol J Radiol Date: 2018-04-27