title: Is bronchial wall imaging affected by temporal resolution? comparative evaluation at 140 and 75 ms in 90 patients.
abstract: OBJECTIVE
  To evaluate the influence of temporal resolution (TR) on cardiogenic artefacts at the level of bronchial walls.
  
  
  METHODS
  Ninety patients underwent a dual-source, single-energy chest CT examination enabling reconstruction of images with a TR of 75 ms (i.e., optimized TR) (Group 1) and 140 ms (i.e., standard TR) (Group 2). Cardiogenic artefacts were analyzed at the level of eight target bronchi, i.e., right (R) and left (L) B1, B5, B7, and B10 (total number of bronchi examined: n = 720).
  
  
  RESULTS
  Cardiogenic artefacts were significantly less frequent and less severe in Group 1 than in Group 2 (p < 0.0001) with the highest scores of discordant ratings for bronchi in close contact with cardiac cavities: RB5 (61/90; 68%); LB5 (66/90; 73%); LB7 (63/90; 70%). In Group 1, 78% (560/720) of bronchi showed no cardiac motion artefacts, whereas 22% of bronchi (160/720) showed artefacts rated as mild (152/160; 95%), moderate (7/160; 4%), and severe (1/160; 1%). In Group 2, 70% of bronchi (503/720) showed artefacts rated as mild (410/503; 82%), moderate (82/503; 16%), and severe (11/503; 2%).
  
  
  CONCLUSIONS
  At 75 ms, most bronchi can be depicted without cardiogenic artefacts.
  
  
  CONCLUSIONS
  • Quantitative CT helps analyze morphologic changes in COPD patients • Cardiogenic artefacts may hamper precise analysis of bronchial dimensions • Temporal resolution of CT acquisitions is an important parameter for bronchial imaging.
authors.affiliation: Department of Thoracic Imaging, Hospital Calmette (EA 2694), CHRU et Université de Lille, Lille, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Hutt
authors.affiliation: Department of Thoracic Imaging, Hospital Calmette (EA 2694), CHRU et Université de Lille, Lille, France.
authors.forename: Nunzia
authors.initials: N
authors.lastname: Tacelli
authors.affiliation: Department of Thoracic Imaging, Hospital Calmette (EA 2694), CHRU et Université de Lille, Lille, France.
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Faivre
authors.affiliation: Computed Tomography; Siemens Healthcare, Forchheim, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Flohr
authors.affiliation: Department of Biostatistics (EA 2694), CHRU et Université de Lille, Lille, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Duhamel
authors.affiliation: Department of Thoracic Imaging, Hospital Calmette (EA 2694), CHRU et Université de Lille, Lille, France.
authors.forename: Jacques
authors.initials: J
authors.lastname: Remy
authors.affiliation: Department of Thoracic Imaging, Hospital Calmette (EA 2694), CHRU et Université de Lille, Lille, France. martine.remy@chru-lille.fr.
authors.forename: Martine
authors.initials: M
authors.lastname: Remy-Jardin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016477:Artifacts; D001980:Bronchi; D001995:Bronchography / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D013995:Time; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult
keywords: Artefacts; Bronchi; Dual-source CT; Quantitative CT; Temporal resolution