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Patient-based Performance Assessment for Pediatric Abdominal CT: An Automated Monitoring System Based on Lesion Detectability and Radiation Dose.

Publication ,  Journal Article
Lacy, T; Ding, A; Minkemeyer, V; Frush, D; Samei, E
Published in: Acad Radiol
February 2021

RATIONALE AND OBJECTIVE: To deploy an automated tool for evaluating pediatric body computed tomography (CT) performance utilizing metrics of radiation dose and image quality for the task of liver lesion detection. MATERIALS AND METHODS: This IRB approved retrospective investigation used 507 IV-contrast-enhanced abdominopelvic CT scans of pediatric patients (<18 years) between June 2014 and November 2017 acquired on three scanner models from two manufacturers. The scans were evaluated in terms of radiation metrics (CTDIvol, DLP, and SSDE) as well as task-based performance based on the clinical task of detecting a 5 mm liver lesion with a 10 HU attenuation difference from background liver. An informatics algorithm extracted a previously-validated quantitative detectability index (d') from each case reflective of the likelihood of detecting a liver lesion. The results were analyzed in terms of the relationship between d' and radiation dose metrics. RESULTS: There was minimal SSDE variability by age. Median SSDE at 100 kV on one scanner model was 5.2 mGy (5.0-5.4 mGy interquartile range). However, when assessing image quality by applying d', the age groups separated such that the younger patients had higher d' values than older patients. Similar trends were seen in all scanners. CONCLUSIONS: An automated method to assess clinical image quality for pediatric CT provided a metric of image quality that varied as expected across ages (i.e., higher quality for younger patients). This tool affords the establishment of a quality reference level that, in addition to dose estimations currently available, would allow for enhanced assessment (e.g., facilitated audit) of CT imaging performance.

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Published In

Acad Radiol

DOI

EISSN

1878-4046

Publication Date

February 2021

Volume

28

Issue

2

Start / End Page

217 / 224

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Retrospective Studies
  • Radiation Dosage
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Child
  • Algorithms
  • Abdomen
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

Citation

APA
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ICMJE
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Lacy, T., Ding, A., Minkemeyer, V., Frush, D., & Samei, E. (2021). Patient-based Performance Assessment for Pediatric Abdominal CT: An Automated Monitoring System Based on Lesion Detectability and Radiation Dose. Acad Radiol, 28(2), 217–224. https://doi.org/10.1016/j.acra.2020.01.018
Lacy, Tyler, Aiping Ding, Vivian Minkemeyer, Donald Frush, and Ehsan Samei. “Patient-based Performance Assessment for Pediatric Abdominal CT: An Automated Monitoring System Based on Lesion Detectability and Radiation Dose.Acad Radiol 28, no. 2 (February 2021): 217–24. https://doi.org/10.1016/j.acra.2020.01.018.
Lacy, Tyler, et al. “Patient-based Performance Assessment for Pediatric Abdominal CT: An Automated Monitoring System Based on Lesion Detectability and Radiation Dose.Acad Radiol, vol. 28, no. 2, Feb. 2021, pp. 217–24. Pubmed, doi:10.1016/j.acra.2020.01.018.
Journal cover image

Published In

Acad Radiol

DOI

EISSN

1878-4046

Publication Date

February 2021

Volume

28

Issue

2

Start / End Page

217 / 224

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Retrospective Studies
  • Radiation Dosage
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Child
  • Algorithms
  • Abdomen
  • 3202 Clinical sciences
  • 1103 Clinical Sciences