Francesco Macri1, Joel Greffier2, Fabricio Pereira2, Alina Chica Rosa2, Elina Khasanova2, Pierre-Geraut Claret3, Ahmed Larbi2, Gianfranco Gualdi4, Jean Paul Beregi2. 1. Department of Radiology, Nîmes University Hospital, Medical Imaging Group Nîmes, EA 2415, Nîmes, France; Department of Emergency Radiology, Umberto I Hospital, Sapienza University, Rome, Italy. Electronic address: francesco.macri@chu-nimes.fr. 2. Department of Radiology, Nîmes University Hospital, Medical Imaging Group Nîmes, EA 2415, Nîmes, France. 3. Department of Emergency care and Traumatology, Nîmes University Hospital, Nîmes, France. 4. Department of Emergency Radiology, Umberto I Hospital, Sapienza University, Rome, Italy.
Abstract
OBJECTIVE: To compare the diagnostic confidence between low-dose computed-tomography (LDCT) and ultra-low-dose CT (ULDCT) of the chest on a single source CT system (SSCT) for patients with acute dyspnoea. MATERIALS AND METHODS: One hundred thirty-three consecutive dyspnoeic patients referred from the emergency room (ER) were selected to undergo two sequential non-enhanced chest CT acquisitions: LDCT first acquisition (100kVp and 60mAs), followed by ULDCT (100kVp±20 and 10mAs). Images were reconstructed with sinogram affirmed reconstruction (SAFIRE). Objective and subjective image quality assessments were made. Two radiologists evaluated subjective image quality and the level of diagnostic confidence as certain or uncertain. RESULTS: The mean effective doses (ED) were 1.164±0.403 and 0.182±0.028mSv for LDCT and ULDCT, respectively. Objective image quality improved significantly on lung images of ULDCT compared with LDCT (p<0.05). Subjective image quality was rated excellent/good in 90% of patients with BMI=25kg/m(2) for ULDCT. The level of diagnostic confidence was "certain" in all cases for both radiologists with excellent inter-observer agreement (k=1). CONCLUSION: Chest ULDCT with SAFIRE on a SSCT allows a high level diagnostic confidence for the evaluation of selected acute dyspnoeic patients.
OBJECTIVE: To compare the diagnostic confidence between low-dose computed-tomography (LDCT) and ultra-low-dose CT (ULDCT) of the chest on a single source CT system (SSCT) for patients with acute dyspnoea. MATERIALS AND METHODS: One hundred thirty-three consecutive dyspnoeic patients referred from the emergency room (ER) were selected to undergo two sequential non-enhanced chest CT acquisitions: LDCT first acquisition (100kVp and 60mAs), followed by ULDCT (100kVp±20 and 10mAs). Images were reconstructed with sinogram affirmed reconstruction (SAFIRE). Objective and subjective image quality assessments were made. Two radiologists evaluated subjective image quality and the level of diagnostic confidence as certain or uncertain. RESULTS: The mean effective doses (ED) were 1.164±0.403 and 0.182±0.028mSv for LDCT and ULDCT, respectively. Objective image quality improved significantly on lung images of ULDCT compared with LDCT (p<0.05). Subjective image quality was rated excellent/good in 90% of patients with BMI=25kg/m(2) for ULDCT. The level of diagnostic confidence was "certain" in all cases for both radiologists with excellent inter-observer agreement (k=1). CONCLUSION: Chest ULDCT with SAFIRE on a SSCT allows a high level diagnostic confidence for the evaluation of selected acute dyspnoeicpatients.
Authors: Inge A H van den Berk; Maadrika M N P Kanglie; Tjitske S R van Engelen; Shandra Bipat; Marcel G W Dijkgraaf; Patrick M M Bossuyt; Wouter de Monyé; Jan M Prins; Jaap Stoker Journal: Diagn Progn Res Date: 2018-08-08
Authors: Maadrika M N P Kanglie; Shandra Bipat; Inge A H van den Berk; Tjitske S R van Engelen; Marcel G W Dijkgraaf; Jan M Prins; Jaap Stoker; Patrick M M Bossuyt Journal: Trials Date: 2020-05-14 Impact factor: 2.279