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Imaging the Infant Chest without Sedation: Feasibility of Using Single Axial Rotation with 16-cm Wide-Detector CT

Yanan Zhu1, Zhengjun Li1, Jiankang Ma1

  • 1From the Medical Imaging Centre (Y.Z., Z.L., J.M., Z.P., X.Q., M.X., H.Z.) and Department of Pediatrics (Y.H.), Ankang Central Hospital, Ankang 725000, China; and CT Laboratory, GE Healthcare China, Beijing, China (J.L.).

Radiology
|September 29, 2017
PubMed

Insights

New computed tomography (CT) imaging for infant chests without sedation significantly reduces radiation dose and preparation time. This wide-detector CT method offers comparable image quality to traditional sedation-based scans.

Area of Science:

  • Radiology
  • Medical Imaging
  • Pediatric Imaging

Background:

  • Sedation in infants for computed tomography (CT) scans poses risks and increases preparation time.
  • Conventional helical CT with sedation is a standard but time-consuming and radiation-intensive procedure for infant chest imaging.

Purpose of the Study:

  • To compare image quality, patient preparation time, and radiation dose between single axial rotation 16-cm wide-detector CT without sedation and 64-row CT with sedation for infant chest imaging.

Main Methods:

  • Prospective enrollment of 32 infants (group 1) for nonenhanced chest CT without sedation using a 16-cm wide-detector CT scanner.
  • Comparison with a historical control group (group 2) of 30 infants who underwent 64-row CT with sedation.
  • Utilized automatic tube current modulation and specific tube voltages based on patient weight.

Main Results:

  • No significant differences in image quality (attenuation, noise, subjective scores) between the two groups.
  • Group 1 showed significantly reduced scan time (83%), preparation time (57%), CT dose index (CTDI) (42%), and dose-length product (DLP) (52%) compared to group 2.
  • Statistical significance was achieved for all reported reductions (P < .05).

Conclusions:

  • Single axial rotation with 16-cm wide-detector CT without sedation is a viable alternative for infant chest imaging.
  • This method effectively reduces radiation dose, preparation time, and scan duration.
  • Comparable image quality is maintained, making it a potentially safer and more efficient option for pediatric patients.

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