Advanced

Evaluation of image quality and radiation dose of abdominal dual-energy CT

Schmidt, David LU ; Söderberg, Marcus LU ; Nilsson, Mats LU ; Lindvall, Håkan LU ; Christoffersen, Christina and Leander, Peter LU (2017) In Acta Radiologica
Abstract
Background Dual-energy computed tomography (DECT) has conceptually been known since the late 1970s and commercially available as dual-source CT (DSCT) systems since 2006; however, the technique has not yet seen widespread implementation in routine protocols. Part of the cause for this is likely due to misconceptions about radiation dose and/or image quality when using DECT. Purpose To compare image quality and radiation dose of single-energy CT (SECT) and DECT abdominal examinations obtained in clinical practice on a second generation DSCT. Material and Methods A total of 495 included patients (mean age = 70.9 years) were retrospectively analyzed after undergoing either SECT (120 kVp and age-based mAs) or DECT examinations (80/Sn140 kVp... (More)
Background Dual-energy computed tomography (DECT) has conceptually been known since the late 1970s and commercially available as dual-source CT (DSCT) systems since 2006; however, the technique has not yet seen widespread implementation in routine protocols. Part of the cause for this is likely due to misconceptions about radiation dose and/or image quality when using DECT. Purpose To compare image quality and radiation dose of single-energy CT (SECT) and DECT abdominal examinations obtained in clinical practice on a second generation DSCT. Material and Methods A total of 495 included patients (mean age = 70.9 years) were retrospectively analyzed after undergoing either SECT (120 kVp and age-based mAs) or DECT examinations (80/Sn140 kVp and age-based mAs). The patients were divided into two groups based on examination type (247 SECT, 248 DECT), which were then subdivided into two groups, each based on age. Image noise was measured in the liver and image quality was subjectively assessed in 100 randomly selected patients. Results Noise levels were significantly lower in DECT (13.9 HU) compared with SECT (14.7 HU) ( P < 0.05). No significant differences in subjective image quality were found between DECT and SECT, except for one criterion in the 50-74-year age group. The mean dose-length product (DLP) (376 mGy-cm) and effective dose (6.1 mSv) of DECT were significantly lower than the DLP (513 mGy-cm) and effective dose (8.4 mSv) of SECT ( P < 0.05). Conclusion DECT can be implemented in routine clinical use without negatively impacting image quality while lowering radiation dose to the patient. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Multidetector computed tomography (MDCT); abdomen; diagnostic imaging; radiation dosage; retrospective studies
in
Acta Radiologica
publisher
John Wiley & Sons
external identifiers
  • scopus:85046040527
ISSN
0284-1851
DOI
10.1177/0284185117732806
language
English
LU publication?
yes
id
6e806e3c-c845-46ab-9467-9b84f2f83ab3
date added to LUP
2017-10-04 13:01:01
date last changed
2018-05-20 04:37:44
@article{6e806e3c-c845-46ab-9467-9b84f2f83ab3,
  abstract     = {Background Dual-energy computed tomography (DECT) has conceptually been known since the late 1970s and commercially available as dual-source CT (DSCT) systems since 2006; however, the technique has not yet seen widespread implementation in routine protocols. Part of the cause for this is likely due to misconceptions about radiation dose and/or image quality when using DECT. Purpose To compare image quality and radiation dose of single-energy CT (SECT) and DECT abdominal examinations obtained in clinical practice on a second generation DSCT. Material and Methods A total of 495 included patients (mean age = 70.9 years) were retrospectively analyzed after undergoing either SECT (120 kVp and age-based mAs) or DECT examinations (80/Sn140 kVp and age-based mAs). The patients were divided into two groups based on examination type (247 SECT, 248 DECT), which were then subdivided into two groups, each based on age. Image noise was measured in the liver and image quality was subjectively assessed in 100 randomly selected patients. Results Noise levels were significantly lower in DECT (13.9 HU) compared with SECT (14.7 HU) ( P &lt; 0.05). No significant differences in subjective image quality were found between DECT and SECT, except for one criterion in the 50-74-year age group. The mean dose-length product (DLP) (376 mGy-cm) and effective dose (6.1 mSv) of DECT were significantly lower than the DLP (513 mGy-cm) and effective dose (8.4 mSv) of SECT ( P &lt; 0.05). Conclusion DECT can be implemented in routine clinical use without negatively impacting image quality while lowering radiation dose to the patient.},
  author       = {Schmidt, David and Söderberg, Marcus and Nilsson, Mats and Lindvall, Håkan and Christoffersen, Christina and Leander, Peter},
  issn         = {0284-1851},
  keyword      = {Multidetector computed tomography (MDCT); abdomen; diagnostic imaging; radiation dosage; retrospective studies},
  language     = {eng},
  publisher    = {John Wiley & Sons},
  series       = {Acta Radiologica},
  title        = {Evaluation of image quality and radiation dose of abdominal dual-energy CT},
  url          = {http://dx.doi.org/10.1177/0284185117732806},
  year         = {2017},
}