BACKGROUND: Lung inflation and respiratory motion during chest CT affect diagnostic accuracy and reproducibility. OBJECTIVE: To describe a simple volume-monitored (VM) method for performing reproducible, motion-free full inspiratory and end expiratory chest CT examinations in children. MATERIALS AND METHODS: Fifty-two children with cystic fibrosis (mean age 8.8 ± 2.2 years) underwent pulmonary function tests and inspiratory and expiratory VM-CT scans (1.25-mm slices, 80-120 kVp, 16-40 mAs) according to an IRB-approved protocol. The VM-CT technique utilizes instruction from a respiratory therapist, a portable spirometer and real-time documentation of lung volume on a computer. CT image quality was evaluated for achievement of targeted lung-volume levels and for respiratory motion. RESULTS: Children achieved 95% of vital capacity during full inspiratory imaging. For end expiratory scans, 92% were at or below the child's end expiratory level. Two expiratory exams were judged to be at suboptimal volumes. Two inspiratory (4%) and three expiratory (6%) exams showed respiratory motion. Overall, 94% of scans were performed at optimal volumes without respiratory motion. CONCLUSION: The VM-CT technique is a simple, feasible method in children as young as 4 years to achieve reproducible high-quality full inspiratory and end expiratory lung CT images.
BACKGROUND: Lung inflation and respiratory motion during chest CT affect diagnostic accuracy and reproducibility. OBJECTIVE: To describe a simple volume-monitored (VM) method for performing reproducible, motion-free full inspiratory and end expiratory chest CT examinations in children. MATERIALS AND METHODS: Fifty-two children with cystic fibrosis (mean age 8.8 ± 2.2 years) underwent pulmonary function tests and inspiratory and expiratory VM-CT scans (1.25-mm slices, 80-120 kVp, 16-40 mAs) according to an IRB-approved protocol. The VM-CT technique utilizes instruction from a respiratory therapist, a portable spirometer and real-time documentation of lung volume on a computer. CT image quality was evaluated for achievement of targeted lung-volume levels and for respiratory motion. RESULTS:Children achieved 95% of vital capacity during full inspiratory imaging. For end expiratory scans, 92% were at or below the child's end expiratory level. Two expiratory exams were judged to be at suboptimal volumes. Two inspiratory (4%) and three expiratory (6%) exams showed respiratory motion. Overall, 94% of scans were performed at optimal volumes without respiratory motion. CONCLUSION: The VM-CT technique is a simple, feasible method in children as young as 4 years to achieve reproducible high-quality full inspiratory and end expiratory lung CT images.
Authors: T E Robinson; A N Leung; R B Moss; F G Blankenberg; H al-Dabbagh; W H Northway Journal: AJR Am J Roentgenol Date: 1999-06 Impact factor: 3.959
Authors: Sanja Stanojevic; Angie Wade; Tim J Cole; Sooky Lum; Adnan Custovic; Mike Silverman; Graham L Hall; Liam Welsh; Jane Kirkby; Wenche Nystad; Monique Badier; Stephanie Davis; Steven Turner; Pavilio Piccioni; Daphna Vilozni; Howard Eigen; Helen Vlachos-Mayer; Jinping Zheng; Waldemar Tomalak; Marcus Jones; John L Hankinson; Janet Stocks Journal: Am J Respir Crit Care Med Date: 2009-07-02 Impact factor: 21.405
Authors: Nora M Raschle; Michelle Lee; Roman Buechler; Joanna A Christodoulou; Maria Chang; Monica Vakil; Patrice L Stering; Nadine Gaab Journal: J Vis Exp Date: 2009-07-30 Impact factor: 1.355