Chest High-Resolution Computed Tomography for chronic suppurative lung disease in late childhood and early adolescence: Radiation dose and image quality evaluation using iDose4 Iterative Reconstruction Algorithm
Journal Title: Hellenic Journal of Radiology - Year 2018, Vol 3, Issue 2
Abstract
Purpose: The large number of computed tomography (CT) examinations taking place in everyday clinical practice has increased the risk for radiation-induced carcinogenesis, especially in children with longer life expectancy than adults. The recently developed Iterative Reconstruction (IR) algorithms reduce image noise and therefore radiation exposure. This study compares the iDose4 IR Algorithm with Filtered-Back Projection (FBP) in terms of radiation exposure and image quality (IQ) in 31 chest high resolution CT (HRCT) examinations performed in school-aged children with chronic suppurative lung disease (7-13 years old, weighing >30 kgs). Material and Methods: Thirteen patients were scanned using the FBP protocol (FBP group) and 18 patients using the iDose4 protocol (iDose group) and reduced tube current-time product (mAs). Both groups were scanned on a 64-detector row CT scanner. The iDose group images were reconstructed with iDose levels 2, 4 and 6. Radiation exposure was estimated, while subjective and objective IQ was evaluated. Unpaired t-test was used for data statistical analysis. Results: The iDose4 application allowed a significant dose reduction (up to 64%). Subjective image noise was comparable between FBP and iDose4 images, whereas objective image noise was comparable between FBP and iDose level 2 images. Oversmoothing artefacts already described in literature were only noticed in a few cases with iDose level 6, but without significantly affecting the diagnostic acceptability. Conclusions: The use of the iDose4 IR algorithm in chest HRCT of preadolescent and early adolescent-aged children leads to significant dose reduction, without significantly affecting IQ. Further evaluation with a larger patient sample and lower mAs settings is needed in order to investigate further reduction of exposure parameters in chest HRCT of children weighing more than 30 kgs.
Authors and Affiliations
Magdalini Smarda, Efstathios Efstathopoulos, Agapi Ploussi, Argyro Mazioti, Sophia Kordolaimi, Nikolaos Kelekis, Efthymia Alexopoulou
Keywords
Related Articles
- EP ID EP373636
- DOI -
- Views 128
- Downloads 0
Computed tomography-guided lung biopsy with the patient in lateral decubitus position and the biopsy side down: effect on pneumothorax rate and clinical significance
Purpose: The purpose of our study is to assess the effect of patient positioning (prone or supine versus lateral decubitus position) upon the rate of pneumothorax, during computed tomography (CT)–guided trans-thoracic ne...
Piriformis muscle syndrome: MR imaging findings and treatment outcome in 23 patients
Purpose: To increase the clinical awareness of piriformis muscle syndrome (PMs) by reporting the magnetic resonance (MR) imaging findings and therapeutic outcome in a series of 23 patients with clinically suspected syndr...
Managing the Failing Dialysis Permacath: Results from a 5-year Retrospective Analysis
Purpose: To evaluate the results of a retrospective analysis on the management of failing permanent dialysis catheters. Material and Methods: Within 5 years (1/2011-12/2015), 1,158 permanent dialysis catheters were inse...
Cystic hepatobiliary lesions: differentiation with cross sectional imaging
The purpose of this article is to review the imaging findings of cystic hepatobiliary lesions in the adult in order to identify any features that will help the radiologist understand and recognise the underlying disease....
Dynamic Susceptibility Contrast MRI in Gliomas: What the Radiologist Needs to Know
Perfusion MRI analyses tissues’ temporal responses to the inflowing exogenous contrast agents or labeled blood to characterize the hemodynamics properties of the tissues. Perfusion MRI techniques are sensitive to microva...