Antiscatter grid use in pediatric digital tomosynthesis imaging

The objective of this study was to assess the effect of antiscatter grid use on tomosynthesis image quality. We performed an observer study that rated the image quality of digital tomosynthesis scout radiographs and slice images of a Leeds TO.20 contrast‐detail test object embedded in acrylic with a...

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Bibliographic Details
Published in:Journal of applied clinical medical physics 2011, Vol.12 (4), p.221-230
Main Authors: King, Jenna M., Elbakri, Idris A., Reed, Martin
Format: Article
Language:English
Subjects:
antiscatter grid
Child
Digital imaging
digital radiography
digital tomosynthesis
Humans
Image Processing, Computer-Assisted
Medical Imaging
Noise
Pediatrics
Quality
Radiation Dosage
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Radiography
Scattering, Radiation
Sensors
Studies
Tomography, X-Ray - methods
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Summary:The objective of this study was to assess the effect of antiscatter grid use on tomosynthesis image quality. We performed an observer study that rated the image quality of digital tomosynthesis scout radiographs and slice images of a Leeds TO.20 contrast‐detail test object embedded in acrylic with and without a grid. We considered 10, 15, 20 and 25 cm of acrylic to represent the wide range of patient thicknesses encountered in pediatric imaging. We also acquired and rated images without a grid at an increased patient dose. The readers counted the total number of visible details in each image as a measure of relative image quality. We observed that the antiscatter grid improves tomosynthesis image quality compared to the grid‐out case, which received image quality scores similar to grid‐in radiography. Our results suggest that, in order to achieve the best image quality in exchange for the increase in patient dose, it may often be appropriate to include an antiscatter grid for pediatric tomosynthesis imaging, particularly if the patient thickness is greater than 10 cm. PACS number: 87.57.‐s
ISSN:1526-9914
1526-9914
DOI:10.1120/jacmp.v12i4.3641