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Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations
The purpose of this study was to quantify how changing the amount of radiation used to perform routine head CT examinations ([Formula: see text]) affects visibility of key anatomical structures. Eight routine noncontrast head CT exams were selected from six CT scanners, each of which had a different...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690219/ https://www.ncbi.nlm.nih.gov/pubmed/26894339 http://dx.doi.org/10.1120/jacmp.v17i1.5701 |
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author | Tipnis, Sameer Thampy, Rajesh Rumboldt, Zoran Spampinato, Maria Matheus, Gisele Huda, Walter |
author_facet | Tipnis, Sameer Thampy, Rajesh Rumboldt, Zoran Spampinato, Maria Matheus, Gisele Huda, Walter |
author_sort | Tipnis, Sameer |
collection | PubMed |
description | The purpose of this study was to quantify how changing the amount of radiation used to perform routine head CT examinations ([Formula: see text]) affects visibility of key anatomical structures. Eight routine noncontrast head CT exams were selected from six CT scanners, each of which had a different [Formula: see text] setting (60 to 75 mGy). All exams were normal and two slices were selected for evaluation, one at the level of basal ganglia and the other at the fourth ventricle. Three experienced neuroradiologists evaluated the visibility of selected structures, including the putamen, caudate nucleus, thalamus, internal capsule, grey/white differentiation, and brainstem. Images were scored on a five‐point scoring scheme (1, unacceptable, 3, satisfactory, and 5, excellent). Reader scores, averaged over the cases obtained from each scanner, were plotted as a function of the corresponding [Formula: see text]. Average scores for the fourth ventricle were [Formula: see text] and for the basal ganglia were [Formula: see text]. No image received a score of 1. Two readers showed no clear trend of an increasing score with increasing [Formula: see text]. One reader showed a slight trend of increasing score with increasing [Formula: see text] , but the increase in score from a 25% increase in [Formula: see text] was a fraction of the standard deviation associated average scores. Collectively, results indicated that there were no clear improvements in visualizing neuroanatomy when [Formula: see text] increased from 60 to 75 mGy in routine head CT examinations. Our study showed no apparent benefit of using more than 60 mGy when performing routine noncontrast head CT examinations. PACS number(s): 87.57.C‐ |
format | Online Article Text |
id | pubmed-5690219 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-56902192018-04-02 Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations Tipnis, Sameer Thampy, Rajesh Rumboldt, Zoran Spampinato, Maria Matheus, Gisele Huda, Walter J Appl Clin Med Phys Medical Imaging The purpose of this study was to quantify how changing the amount of radiation used to perform routine head CT examinations ([Formula: see text]) affects visibility of key anatomical structures. Eight routine noncontrast head CT exams were selected from six CT scanners, each of which had a different [Formula: see text] setting (60 to 75 mGy). All exams were normal and two slices were selected for evaluation, one at the level of basal ganglia and the other at the fourth ventricle. Three experienced neuroradiologists evaluated the visibility of selected structures, including the putamen, caudate nucleus, thalamus, internal capsule, grey/white differentiation, and brainstem. Images were scored on a five‐point scoring scheme (1, unacceptable, 3, satisfactory, and 5, excellent). Reader scores, averaged over the cases obtained from each scanner, were plotted as a function of the corresponding [Formula: see text]. Average scores for the fourth ventricle were [Formula: see text] and for the basal ganglia were [Formula: see text]. No image received a score of 1. Two readers showed no clear trend of an increasing score with increasing [Formula: see text]. One reader showed a slight trend of increasing score with increasing [Formula: see text] , but the increase in score from a 25% increase in [Formula: see text] was a fraction of the standard deviation associated average scores. Collectively, results indicated that there were no clear improvements in visualizing neuroanatomy when [Formula: see text] increased from 60 to 75 mGy in routine head CT examinations. Our study showed no apparent benefit of using more than 60 mGy when performing routine noncontrast head CT examinations. PACS number(s): 87.57.C‐ John Wiley and Sons Inc. 2016-01-08 /pmc/articles/PMC5690219/ /pubmed/26894339 http://dx.doi.org/10.1120/jacmp.v17i1.5701 Text en © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/3.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Medical Imaging Tipnis, Sameer Thampy, Rajesh Rumboldt, Zoran Spampinato, Maria Matheus, Gisele Huda, Walter Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title | Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title_full | Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title_fullStr | Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title_full_unstemmed | Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title_short | Radiation intensity ([Formula: see text]) and visibility of anatomical structures in head CT examinations |
title_sort | radiation intensity ([formula: see text]) and visibility of anatomical structures in head ct examinations |
topic | Medical Imaging |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690219/ https://www.ncbi.nlm.nih.gov/pubmed/26894339 http://dx.doi.org/10.1120/jacmp.v17i1.5701 |
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