Radiographers’ perspectives’ on Visual Grading Analysis as a scientific method to evaluate image quality

Precht, Helle; Hansson, Jonny; Outzen, Claus Bjørn; Hogg, Peter; Tingberg, Anders

doi:10.1016/j.radi.2019.06.006

Cited by 31 publications

(25 citation statements)

References 34 publications

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“…Images were reviewed in isolation and with no reference image therefore individual structures were reviewed using an absolute VGA [17]. The VGA scale had four grades which were ''very clear", ''clear", ''unclear" and ''not visible".…”

Section: Methodsmentioning

confidence: 99%

Magnetic resonance imaging sequence evaluation of an MR Linac system; early clinical experience

Eccles

Smith

Bower

et al. 2019

Technical Innovations & Patient Support in Radiation Oncolo

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Objective(s): To systematically identify the preferred magnetic resonance imaging (MRI) sequences following volunteer imaging on a 1.5 Tesla (T) MR-Linear Accelerator (MR Linac) for future protocol development. Methods: Non-patient volunteers were recruited to a Research and Ethics committee approved prospective MR-only imaging study on a 1.5T MR Linac system. Volunteers attended 1-3 imaging sessions that included a combination of mDixon, T1w, T2w sequences using 2-dimensional (2D) and 3-dimensional (3D) acquisitions. Each sequence was acquired over 2-7 minutes and reviewed by a panel of 3 observers to evaluate image quality using a visual grading analysis based on a 4-point Likert scale. Sequences were acquired and modified iteratively until deemed fit for purpose (online image matching or re-planning) and all observers agreed they were suitable in 3 volunteers. Results: 26 volunteers underwent 31 imaging sessions of six general anatomical regions. Images were acquired in one or two of six general anatomical regions: male pelvis (n = 9), female pelvis (n = 4), chestwall/breast (n = 5), lung/oesophagus (n = 5), abdomen (n = 3) and head and neck (n = 5). Images were acquired using a pre-defined exam-card that on average, included six sequences (range 2-10), with a maximum scan time of approximately one hour. The majority of observers preferred T2-weighted sequences. The thorax teams were the only groups to prefer T1-weighted imaging. Conclusions: An iterative process identified sequence agreement in all anatomical regions. These sequences will now be evaluated in patient volunteers. Advances in knowledge: This manuscript is the first publication sharing the results of the first systematic selection of MRI sequences for use in on-board MRI-guided radiotherapy by end-users (therapeutic radiographers and clinical oncologists) in healthy volunteers.

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Section: Methodsmentioning

confidence: 99%

Magnetic resonance imaging sequence evaluation of an MR Linac system; early clinical experience

Eccles

Smith

Bower

et al. 2019

Technical Innovations & Patient Support in Radiation Oncolo

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show abstract

“…In this test an AUC below 0.5 suggest preference for wearing no glasses. VGC Analyzer is a valid option 51 for the quantitative assessment of image quality and has many advantages including high validity 52 and ViewDEX has similar functionality to the viewing software available in clinical practice. 53…”

Section: Discussionmentioning

confidence: 99%

Reduction of visual acuity decreases capacity to evaluate radiographic image quality

Reis

Soares

et al. 2020

Radiography

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“…More quantifiable measures of image quality do exist and are gaining traction, such as visual grading analysis (VGA), which could also serve as a comparator in a future study. 9…”

Section: Current and Future Directionsmentioning

confidence: 99%

Development of nuclear medicine image quality assessment criteria for use in a technologist peer review program

Mathews

Grewal

Gillan

et al. 2021

Journal of Medical Imaging and Radiation Sciences

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Radiographers’ perspectives’ on Visual Grading Analysis as a scientific method to evaluate image quality

Cited by 31 publications

References 34 publications

Magnetic resonance imaging sequence evaluation of an MR Linac system; early clinical experience

Magnetic resonance imaging sequence evaluation of an MR Linac system; early clinical experience

Reduction of visual acuity decreases capacity to evaluate radiographic image quality

Development of nuclear medicine image quality assessment criteria for use in a technologist peer review program

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