@article{fdi:010058216,
  title = {{D}igital correction of computed {X}-radiographs for coral densitometry},
  author = {{D}uprey, {N}icolas and {B}oucher, {H}ugues and {J}imenez, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he recent increase in sea surface temperature and ocean acidification raises major concerns about the evolution of the coral calcification rate. {D}igitized {X}-radiographs have been used for coral skeleton density measurements since the 1980s. {T}he 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. {U}ntil now, extra {X}-ray images or aluminum standards have been used to correct {X}-radiographs. {H}owever, such corrective methods may be constraining when working with a high number of coral samples. {H}ere, we present an inexpensive, straightforward, and accurate digital detrending ({DD}) method to correct the heterogeneities of the {X}-ray irradiation that affect {X}-radiographs. {T}he {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. {T}his digital detrending ({DD}) method was validated using skeletal bulk density measurements and computerized tomography ({CT}). {C}oral densitometry using {DD} corrected {X}-radiographs does not require the destruction of the coral sample and provides high-resolution measurements. {S}ince {DD} does not require extra aluminum standards to correct {X}-radiographs, this method optimizes the working space available on the {X}-ray image. {M}oreover, it corrects the entire {X}-radiograph, thus larger samples or numerous samples can be {X}-rayed at the same time.},
  keywords = {{C}alcification rate ; {C}oral densitometry ; {C}oral skeleton ; {D}ensity ; {P}orites sp. ; {S}iderastrea siderea ; {COSTA} {RICA} ; {NOUVELLE} {CALEDONIE} ??},
  booktitle = {},
  journal = {{J}ournal of {E}xperimental {M}arine {B}iology and {E}cology},
  volume = {438},
  numero = {},
  pages = {84--92},
  ISSN = {0022-0981},
  year = {2012},
  DOI = {10.1016/j.jembe.2012.09.007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058216},
}