Dynamic 4D CT (D4DCT) can replace bronchography in the assessment of tracheobronchomalacia (TBM) but setting up a new D4DCT service for infants with TBM poses unique challenges due to their venerability. Simulation prior to implementation is essential as D4DCT involves continuous volumetric CT scanning through the breathing cycle, potentially delivering high radiation doses. Radiation dose, gantry rotation and scan dynamics can be customized. Our purpose is to describe the development and implementation of CT dynamic airway protocol using a 3D printed <i>Infant Dynamic Airway Phantom</i> (phantom) for simulation of D4DCT in tachnypnoea and collapsible airways, thereby validating image quality and estimating radiation dose prior to clinical implementation. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Zhu Xiaowei, Silvestro Elizabeth, Andronikou Savvas

Keywords: dynamic airway, infant, D4DCT

The objective for a low dose imaging protocol was to eliminate patient risks and to reduce radiation doses. Tube placements are confirmed via imaging thereby avoiding utilization of malpositioned tubes. Reduced technical parameters lessen the absorbed skin dose. A limited field of view which includes distal espohagus and airway allows accurate assessment of feeding tube position. The new region of interest eliminates unnecessary exposure to hypersensitive organs including, thyroid and reproductive structures. This coned down view requires a lower image quality thereby allowing a lower dose approach. Read More

Meeting name: SPR 2018 Annual Meeting & Postgraduate Course , 2018

Authors: Flowers Colleen, Kaplan Summer, Zhu Xiaowei

Keywords: Low Dose Protocol, Feeding tube confirmation

It is important for radiologists to recognize and discuss with patients and families the potential risks and clinical manifestations of high Peak Skin Dose. In children undergoing complex Interventional procedures accurate Peak Skin Dose estimates are complicated and time consuming despite reference point doses being available. The availability of the Dose Structure Report (SR) on modern fluoroscopic equipment allows such estimates to be timely and consistent. The process of creating a Peak Skin Dose estimate using a validated radiation data management system (RDMS), capable of collecting detailed acquisition data and modeling will be discussed. Read More

Meeting name: SPR 2019 Annual Meeting & Postgraduate Course , 2019

Authors: Zhu Xiaowei, Whitaker Jayme, Shellikeri Sphoorti, Cahill Anne Marie

Keywords: Peak Skin Dose Estimation, Interventional fluoroscopic, Radiation Data Management System