Evaluation of an iterative model-based reconstruction of pediatric abdominal CT with regard to image quality and radiation dose
Aurumskjöld, Marie-Louise LU ; Söderberg, Marcus LU
; Stålhammar, Fredrik
; Vult von Steyern, Kristina
LU
; Tingberg, Anders
LU
and Ydström, Kristina
(2018)
In Acta Radiologica
59(6).
p.740-747
- Abstract
- Background
In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction.
Purpose
To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method.
Material and Methods
Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose... (More) - Background
In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction.
Purpose
To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method.
Material and Methods
Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose settings and 20 patients were examined with a 32% lower radiation dose. Images from the standard examination were reconstructed with a hybrid iterative reconstruction method (iDose4), and images from the low-dose examinations were reconstructed with both iDose4 and IMR. Image quality was evaluated subjectively by three observers, according to modified EU image quality criteria, and evaluated objectively based on the noise observed in liver images.
Results
Visual grading characteristics analyses showed no difference in image quality between the standard dose examination reconstructed with iDose4 and the low dose examination reconstructed with IMR. IMR showed lower image noise in the liver compared to iDose4 images. Inter- and intra-observer variance was low: the intraclass coefficient was 0.66 (95% confidence interval = 0.60–0.71) for the three observers.
Conclusion
IMR provided image quality equivalent or superior to the standard iDose4 method for evaluating pediatric abdominal CT, even with a 32% dose reduction. (Less) - Abstract (Swedish)
- Background In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction. Purpose To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method. Material and Methods Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose settings and 20 patients were... (More)
- Background In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction. Purpose To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method. Material and Methods Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose settings and 20 patients were examined with a 32% lower radiation dose. Images from the standard examination were reconstructed with a hybrid iterative reconstruction method (iDose4), and images from the low-dose examinations were reconstructed with both iDose4 and IMR. Image quality was evaluated subjectively by three observers, according to modified EU image quality criteria, and evaluated objectively based on the noise observed in liver images. Results Visual grading characteristics analyses showed no difference in image quality between the standard dose examination reconstructed with iDose4 and the low dose examination reconstructed with IMR. IMR showed lower image noise in the liver compared to iDose4 images. Inter- and intra-observer variance was low: the intraclass coefficient was 0.66 (95% confidence interval = 0.60-0.71) for the three observers. Conclusion IMR provided image quality equivalent or superior to the standard iDose4 method for evaluating pediatric abdominal CT, even with a 32% dose reduction. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/d02213dc-1267-44db-916e-00b3272957ef
- author
- Aurumskjöld, Marie-Louise
LU
; Söderberg, Marcus
LU
; Stålhammar, Fredrik
; Vult von Steyern, Kristina
LU
; Tingberg, Anders
LU
and Ydström, Kristina
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Radiologica
- volume
- 59
- issue
- 6
- pages
- 740 - 747
- publisher
- SAGE Publications
- external identifiers
-
- pmid:28825319
- scopus:85044289565
- ISSN
- 1600-0455
- DOI
- 10.1177/0284185117728415
- language
- English
- LU publication?
- yes
- id
- d02213dc-1267-44db-916e-00b3272957ef
- date added to LUP
- 2017-09-21 09:58:55
- date last changed
- 2022-04-01 19:34:51
@article{d02213dc-1267-44db-916e-00b3272957ef,
abstract = {{Background<br/><br/>In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction.<br/>Purpose<br/><br/>To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method.<br/>Material and Methods<br/><br/>Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose settings and 20 patients were examined with a 32% lower radiation dose. Images from the standard examination were reconstructed with a hybrid iterative reconstruction method (iDose4), and images from the low-dose examinations were reconstructed with both iDose4 and IMR. Image quality was evaluated subjectively by three observers, according to modified EU image quality criteria, and evaluated objectively based on the noise observed in liver images.<br/>Results<br/><br/>Visual grading characteristics analyses showed no difference in image quality between the standard dose examination reconstructed with iDose4 and the low dose examination reconstructed with IMR. IMR showed lower image noise in the liver compared to iDose4 images. Inter- and intra-observer variance was low: the intraclass coefficient was 0.66 (95% confidence interval = 0.60–0.71) for the three observers.<br/>Conclusion<br/><br/>IMR provided image quality equivalent or superior to the standard iDose4 method for evaluating pediatric abdominal CT, even with a 32% dose reduction.}},
author = {{Aurumskjöld, Marie-Louise and Söderberg, Marcus and Stålhammar, Fredrik and Vult von Steyern, Kristina and Tingberg, Anders and Ydström, Kristina}},
issn = {{1600-0455}},
language = {{eng}},
number = {{6}},
pages = {{740--747}},
publisher = {{SAGE Publications}},
series = {{Acta Radiologica}},
title = {{Evaluation of an iterative model-based reconstruction of pediatric abdominal CT with regard to image quality and radiation dose}},
url = {{http://dx.doi.org/10.1177/0284185117728415}},
doi = {{10.1177/0284185117728415}},
volume = {{59}},
year = {{2018}},
}