Pediatric Radiology

, Volume 40, Issue 10, pp 1663–1669 | Cite as

Volume-monitored chest CT: a simplified method for obtaining motion-free images near full inspiratory and end expiratory lung volumes

  • Kathryn S. MuellerEmail author
  • Frederick R. Long
  • Robert L. Flucke
  • Robert G. Castile
Original Article



Lung inflation and respiratory motion during chest CT affect diagnostic accuracy and reproducibility.


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.


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.


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.


High-resolution CT Imaging techniques Cystic fibrosis Children 



The study was funded by the Cystic Fibrosis Foundation.

Supplementary material


(MP4 4121 kb)


(M4V 28940 kb)


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Kathryn S. Mueller
    • 1
    Email author
  • Frederick R. Long
    • 2
  • Robert L. Flucke
    • 3
  • Robert G. Castile
    • 4
  1. 1.The Ohio State University College of MedicineColumbusUSA
  2. 2.The Children’s Radiological InstituteNationwide Children’s HospitalColumbusUSA
  3. 3.Department of Pulmonary MedicineNationwide Children’s HospitalColumbusUSA
  4. 4.Center for Perinatal ResearchThe Research Institute at Nationwide Children’s HospitalColumbusUSA

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