The Use of Adaptive Statistical Iterative Reconstruction in Pediatric Head CT: a Feasibility Study

Overview

Journal AJNR Am J Neuroradiol

Specialty Neurology

Date 2012 May 26

PMID 22627796

Citations 29

Authors

G A Vorona

G Zuccoli

T Sutcavage

B L Clayton

R C Ceschin

A Panigrahy

Affiliations

Soon will be listed here.

Abstract

Background And Purpose: Iterative reconstruction techniques facilitate CT dose reduction; though to our knowledge, no group has explored using iterative reconstruction with pediatric head CT. Our purpose was to perform a feasibility study to assess the use of ASIR in a small group of pediatric patients undergoing head CT.

Materials And Methods: An Alderson-Rando head phantom was scanned at decreasing 10% mA intervals relative to our standard protocol, and each study was then reconstructed at 10% ASIR intervals. An intracranial region of interest was consistently placed to estimate noise. Our ventriculoperitoneal shunt CT protocol was subsequently modified, and patients were scanned at 20% ASIR with approximately 20% mA reductions. ASIR studies were anonymously compared with older non-ASIR studies from the same patients by 2 attending pediatric neuroradiologists for diagnostic utility, sharpness, noise, and artifacts.

Results: The phantom study demonstrated similar noise at 100% mA/0% ASIR (3.9) and 80% mA/20% ASIR (3.7). Twelve pediatric patients were scanned at reduced dose at 20% ASIR. The average CTDI(vol) and DLP values of the 20% ASIR studies were 22.4 mGy and 338.4 mGy-cm, and for the non-ASIR studies, they were 28.8 mGy and 444.5 mGy-cm, representing statistically significant decreases in the CTDI(vol) (22.1%, P = .00007) and DLP (23.9%, P = .0005) values. There were no significant differences between the ASIR studies and non-ASIR studies with respect to diagnostic acceptability, sharpness, noise, or artifacts.

Conclusions: Our findings suggest that 20% ASIR can provide approximately 22% dose reduction in pediatric head CT without affecting image quality.

Citing Articles

Optimal image quality and radiation doses with optimal tube voltages/currents for pediatric anthropomorphic phantom brains.

Chen L, Kao H, Wu P, Sheu M, Huang L PLoS One. 2024; 19(7):e0306857.

PMID: 39037987 PMC: 11262643. DOI: 10.1371/journal.pone.0306857.

Pediatric low-dose head CT: Image quality improvement using iterative model reconstruction.

Rabinowich A, Shendler G, Ben-Sira L, Shiran S Neuroradiol J. 2023; 36(5):555-562.

PMID: 36897057 PMC: 10569199. DOI: 10.1177/19714009231163559.

The Impact of Data Management on the Achievable Dose and Efficiency of Computed Tomography During the COVID-19 Era: A Facility-Based Ambispective Study.

Al-Sharydah A, Hegazi T, Al-Othman A, Al-Aftan M, Al-Shehri S J Multidiscip Healthc. 2022; 15:2385-2397.

PMID: 36281342 PMC: 9587732. DOI: 10.2147/JMDH.S383957.

Model-based iterative reconstruction in paediatric head computed tomography: a pilot study on dose reduction in children.

Atri P, Sodhi K, Bhatia A, Saxena A, Khandelwal N, Singhi P Pol J Radiol. 2021; 86:e504-e510.

PMID: 34567298 PMC: 8449558. DOI: 10.5114/pjr.2021.108884.

Pediatric head computed tomography with advanced modeled iterative reconstruction: focus on image quality and reduction of radiation dose.

Cho H, Lee S, You S Pediatr Radiol. 2019; 50(2):242-251.

PMID: 31630218 DOI: 10.1007/s00247-019-04532-z.

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