Digital correction of computed X-radiographs for coral densitometry
The recent increase in sea surface temperature and ocean acidification raises major concerns about the evolution of the coral calcification rate. Digitized X-radiographs have been used for coral skeleton density measurements since the 1980s. The main limitation of coral densitometry from digitized X...
Main Authors: | , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2012
|
Subjects: | |
Online Access: | http://www.documentation.ird.fr/hor/fdi:010058216 |
id |
ftird:oai:ird.fr:fdi:010058216 |
---|---|
record_format |
openpolar |
spelling |
ftird:oai:ird.fr:fdi:010058216 2023-05-15T17:51:36+02:00 Digital correction of computed X-radiographs for coral densitometry Duprey, Nicolas Boucher, Hugues Jimenez, C. COSTA RICA NOUVELLE CALEDONIE ?? 2012 http://www.documentation.ird.fr/hor/fdi:010058216 EN eng http://www.documentation.ird.fr/hor/fdi:010058216 oai:ird.fr:fdi:010058216 Duprey Nicolas, Boucher Hugues, Jimenez C. Digital correction of computed X-radiographs for coral densitometry. Journal of Experimental Marine Biology and Ecology, 2012, 438, p. 84-92. Calcification rate Coral densitometry Coral skeleton Density Porites sp Siderastrea siderea text 2012 ftird 2020-08-21T06:55:00Z The recent increase in sea surface temperature and ocean acidification raises major concerns about the evolution of the coral calcification rate. Digitized X-radiographs have been used for coral skeleton density measurements since the 1980s. The main limitation of coral densitometry from digitized X-radiographs is the X-ray intensity heterogeneity due to spherical spreading (inverse square law) and heel effect. Until now, extra X-ray images or aluminum standards have been used to correct X-radiographs. However, such corrective methods may be constraining when working with a high number of coral samples. Here, we present an inexpensive, straightforward, and accurate digital detrending (DD) method to correct the heterogeneities of the X-ray irradiation that affect X-radiographs. The X-radiograph is corrected against the irradiation imprint recorded by its own background using a kriging interpolation method, thus allowing reliable optical density measurements directly on the corrected X-ray image. This digital detrending (DD) method was validated using skeletal bulk density measurements and computerized tomography (CT). Coral densitometry using DD corrected X-radiographs does not require the destruction of the coral sample and provides high-resolution measurements. Since DD does not require extra aluminum standards to correct X-radiographs, this method optimizes the working space available on the X-ray image. Moreover, it corrects the entire X-radiograph, thus larger samples or numerous samples can be X-rayed at the same time. Text Ocean acidification IRD (Institute de recherche pour le développement): Horizon |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
Calcification rate Coral densitometry Coral skeleton Density Porites sp Siderastrea siderea |
spellingShingle |
Calcification rate Coral densitometry Coral skeleton Density Porites sp Siderastrea siderea Duprey, Nicolas Boucher, Hugues Jimenez, C. Digital correction of computed X-radiographs for coral densitometry |
topic_facet |
Calcification rate Coral densitometry Coral skeleton Density Porites sp Siderastrea siderea |
description |
The recent increase in sea surface temperature and ocean acidification raises major concerns about the evolution of the coral calcification rate. Digitized X-radiographs have been used for coral skeleton density measurements since the 1980s. The main limitation of coral densitometry from digitized X-radiographs is the X-ray intensity heterogeneity due to spherical spreading (inverse square law) and heel effect. Until now, extra X-ray images or aluminum standards have been used to correct X-radiographs. However, such corrective methods may be constraining when working with a high number of coral samples. Here, we present an inexpensive, straightforward, and accurate digital detrending (DD) method to correct the heterogeneities of the X-ray irradiation that affect X-radiographs. The X-radiograph is corrected against the irradiation imprint recorded by its own background using a kriging interpolation method, thus allowing reliable optical density measurements directly on the corrected X-ray image. This digital detrending (DD) method was validated using skeletal bulk density measurements and computerized tomography (CT). Coral densitometry using DD corrected X-radiographs does not require the destruction of the coral sample and provides high-resolution measurements. Since DD does not require extra aluminum standards to correct X-radiographs, this method optimizes the working space available on the X-ray image. Moreover, it corrects the entire X-radiograph, thus larger samples or numerous samples can be X-rayed at the same time. |
format |
Text |
author |
Duprey, Nicolas Boucher, Hugues Jimenez, C. |
author_facet |
Duprey, Nicolas Boucher, Hugues Jimenez, C. |
author_sort |
Duprey, Nicolas |
title |
Digital correction of computed X-radiographs for coral densitometry |
title_short |
Digital correction of computed X-radiographs for coral densitometry |
title_full |
Digital correction of computed X-radiographs for coral densitometry |
title_fullStr |
Digital correction of computed X-radiographs for coral densitometry |
title_full_unstemmed |
Digital correction of computed X-radiographs for coral densitometry |
title_sort |
digital correction of computed x-radiographs for coral densitometry |
publishDate |
2012 |
url |
http://www.documentation.ird.fr/hor/fdi:010058216 |
op_coverage |
COSTA RICA NOUVELLE CALEDONIE ?? |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010058216 oai:ird.fr:fdi:010058216 Duprey Nicolas, Boucher Hugues, Jimenez C. Digital correction of computed X-radiographs for coral densitometry. Journal of Experimental Marine Biology and Ecology, 2012, 438, p. 84-92. |
_version_ |
1766158793033383936 |