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Evaluation of image quality of lumbar spine images: a comparison between FFE and VGA.

Tingberg, Anders LU ; Båth, Magnus; Håkansson, Markus; Medin, Joakim LU ; Besjakov, Jack LU ; Sandborg, Michael; Alm-Carlsson, Gudrun; Mattsson, Sören LU and Månsson, Lars Gunnar (2005) In Radiation Protection Dosimetry 114(1-3). p.53-61
Abstract
Purpose: The aim of the present study is to compare two different methods for evaluation of the quality of clinical X-ray images. Methods: Based on fifteen lumbar spine radiographs, two new sets of images were created. A hybrid image set was created by adding two distributions of artificial lesions to each original image. The image quality parameters spatial resolution and noise were manipulated and a total of 210 hybrid images were created. A set of 105 disease-free images was created by applying the same combinations of spatial resolution and noise to the original images. The hybrid images were evaluated with the free-response forced error experiment (FFE) and the normal images with visual grading analysis (VGA) by nine experienced... (More)
Purpose: The aim of the present study is to compare two different methods for evaluation of the quality of clinical X-ray images. Methods: Based on fifteen lumbar spine radiographs, two new sets of images were created. A hybrid image set was created by adding two distributions of artificial lesions to each original image. The image quality parameters spatial resolution and noise were manipulated and a total of 210 hybrid images were created. A set of 105 disease-free images was created by applying the same combinations of spatial resolution and noise to the original images. The hybrid images were evaluated with the free-response forced error experiment (FFE) and the normal images with visual grading analysis (VGA) by nine experienced radiologists. Results: In the VGA study, images with low noise were preferred over images with higher noise levels. The alteration of the MTF had a limited influence on the VGA score. For the FFE study, the visibility of the lesions was independent of the sharpness and the noise level. No correlation was found between the two image quality measures. Conclusions: FFE is a precise method for evaluation of image quality, but the results are only valid for the type of lesion used in the study, whereas VGA is a more general method for clinical image quality assessment. The results of the FFE study indicate that there might be a potential to lower the dose levels in lumbar spine radiography without losing important diagnostic information. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Radiation Protection Dosimetry
volume
114
issue
1-3
pages
53 - 61
publisher
Nuclear Technology Publishing
external identifiers
  • wos:000229927400008
  • pmid:15933081
  • scopus:21244438372
ISSN
1742-3406
DOI
10.1093/rpd/nch566
language
English
LU publication?
yes
id
3483be11-e38e-4336-8e68-f723c42b9a48 (old id 140340)
date added to LUP
2007-07-30 11:51:11
date last changed
2017-01-01 07:21:47
@article{3483be11-e38e-4336-8e68-f723c42b9a48,
  abstract     = {Purpose: The aim of the present study is to compare two different methods for evaluation of the quality of clinical X-ray images. Methods: Based on fifteen lumbar spine radiographs, two new sets of images were created. A hybrid image set was created by adding two distributions of artificial lesions to each original image. The image quality parameters spatial resolution and noise were manipulated and a total of 210 hybrid images were created. A set of 105 disease-free images was created by applying the same combinations of spatial resolution and noise to the original images. The hybrid images were evaluated with the free-response forced error experiment (FFE) and the normal images with visual grading analysis (VGA) by nine experienced radiologists. Results: In the VGA study, images with low noise were preferred over images with higher noise levels. The alteration of the MTF had a limited influence on the VGA score. For the FFE study, the visibility of the lesions was independent of the sharpness and the noise level. No correlation was found between the two image quality measures. Conclusions: FFE is a precise method for evaluation of image quality, but the results are only valid for the type of lesion used in the study, whereas VGA is a more general method for clinical image quality assessment. The results of the FFE study indicate that there might be a potential to lower the dose levels in lumbar spine radiography without losing important diagnostic information.},
  author       = {Tingberg, Anders and Båth, Magnus and Håkansson, Markus and Medin, Joakim and Besjakov, Jack and Sandborg, Michael and Alm-Carlsson, Gudrun and Mattsson, Sören and Månsson, Lars Gunnar},
  issn         = {1742-3406},
  language     = {eng},
  number       = {1-3},
  pages        = {53--61},
  publisher    = {Nuclear Technology Publishing},
  series       = {Radiation Protection Dosimetry},
  title        = {Evaluation of image quality of lumbar spine images: a comparison between FFE and VGA.},
  url          = {http://dx.doi.org/10.1093/rpd/nch566},
  volume       = {114},
  year         = {2005},
}