Antiscatter grid use in pediatric digital tomosynthesis imaging
#MMPMID22089021
King JM
; Elbakri IA
; Reed M
J Appl Clin Med Phys
2011[Nov]; 12
(4
): 3641
PMID22089021
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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.
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