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Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall

This study investigated in vivo the three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall measured in Hounsfield Unit (HU). Seventy-five volunteers underwent clinical lumbar spine CT scans. Data was analyzed with custom-written software to determine the regional variation...

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Autores principales: Irie, Tomoyo Y., Irie, Tohru, Espinoza Orías, Alejandro A., Segami, Kazuyuki, Iwasaki, Norimasa, An, Howard S., Inoue, Nozomu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7813842/
https://www.ncbi.nlm.nih.gov/pubmed/33462307
http://dx.doi.org/10.1038/s41598-020-80676-5
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author Irie, Tomoyo Y.
Irie, Tohru
Espinoza Orías, Alejandro A.
Segami, Kazuyuki
Iwasaki, Norimasa
An, Howard S.
Inoue, Nozomu
author_facet Irie, Tomoyo Y.
Irie, Tohru
Espinoza Orías, Alejandro A.
Segami, Kazuyuki
Iwasaki, Norimasa
An, Howard S.
Inoue, Nozomu
author_sort Irie, Tomoyo Y.
collection PubMed
description This study investigated in vivo the three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall measured in Hounsfield Unit (HU). Seventy-five volunteers underwent clinical lumbar spine CT scans. Data was analyzed with custom-written software to determine the regional variation in pedicle wall attenuation values. A cylindrical coordinate system oriented along the pedicle’s long axis was used to calculate the pedicular wall attenuation distribution three-dimensionally and the highest attenuation value was identified. The pedicular cross-section was divided into four quadrants: lateral, medial, cranial, and caudal. The mean HU value for each quadrant was calculated for all lumbar spine levels (L1–5). The pedicle wall attenuation was analyzed by gender, age, spinal levels and anatomical quadrant. The mean HU values of the pedicle wall at L1 and L5 were significantly lower than the values between L2–4 in both genders and in both age groups. Furthermore, the medial quadrant showed higher HU values than the lateral quadrant at all levels and the caudal quadrant showed higher HU values at L1–3 and lower HU values at L4–5 than the cranial quadrant. These findings may explain why there is a higher incidence of pedicle screw breach in the pedicle lateral wall.
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spelling pubmed-78138422021-01-21 Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall Irie, Tomoyo Y. Irie, Tohru Espinoza Orías, Alejandro A. Segami, Kazuyuki Iwasaki, Norimasa An, Howard S. Inoue, Nozomu Sci Rep Article This study investigated in vivo the three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall measured in Hounsfield Unit (HU). Seventy-five volunteers underwent clinical lumbar spine CT scans. Data was analyzed with custom-written software to determine the regional variation in pedicle wall attenuation values. A cylindrical coordinate system oriented along the pedicle’s long axis was used to calculate the pedicular wall attenuation distribution three-dimensionally and the highest attenuation value was identified. The pedicular cross-section was divided into four quadrants: lateral, medial, cranial, and caudal. The mean HU value for each quadrant was calculated for all lumbar spine levels (L1–5). The pedicle wall attenuation was analyzed by gender, age, spinal levels and anatomical quadrant. The mean HU values of the pedicle wall at L1 and L5 were significantly lower than the values between L2–4 in both genders and in both age groups. Furthermore, the medial quadrant showed higher HU values than the lateral quadrant at all levels and the caudal quadrant showed higher HU values at L1–3 and lower HU values at L4–5 than the cranial quadrant. These findings may explain why there is a higher incidence of pedicle screw breach in the pedicle lateral wall. Nature Publishing Group UK 2021-01-18 /pmc/articles/PMC7813842/ /pubmed/33462307 http://dx.doi.org/10.1038/s41598-020-80676-5 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Irie, Tomoyo Y.
Irie, Tohru
Espinoza Orías, Alejandro A.
Segami, Kazuyuki
Iwasaki, Norimasa
An, Howard S.
Inoue, Nozomu
Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title_full Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title_fullStr Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title_full_unstemmed Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title_short Three-dimensional distribution of CT attenuation in the lumbar spine pedicle wall
title_sort three-dimensional distribution of ct attenuation in the lumbar spine pedicle wall
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7813842/
https://www.ncbi.nlm.nih.gov/pubmed/33462307
http://dx.doi.org/10.1038/s41598-020-80676-5
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