@article{oai:tobunken.repo.nii.ac.jp:00003695,
 author = {松島, 朝秀 and 三浦, 定俊 and Tomohide, MATSUSHIMA and Sadatoshi, MIURA},
 issue = {46},
 journal = {保存科学, Science for conservation},
 month = {Mar},
 note = {A characteristic curve is the graph that represents the relation of light quantity irradiated to a film. Determination of the characteristic curve is essential for a quantitative evaluation of radiography as is X-ray film radiographic imaging process. Plotting the density measured against the log of exposure given makes a typical X-ray film characteristic curve. The shape of the curve represents the contrast response of the X-ray film to a wide range of exposures. When it is not practical to generate the entire
curve through a variation of a single exposure parameter, bootstrap methods can be used. For the bootstrap method used here, a three-exposure parameter (X-ray radiation time：1min, 2min, 3min) generates curve segments.
 In this study the characteristic curves of a mammography film (UM-MA HC, AD-M) and IX-FR film are compared. As a result, fine density was obtained for UM-MA HC in irradiation time of 1 min and for IX-FR in irradiation time of 3 min. The authors conclude that UN-MA HC provides a wide range of characteristics in a short time. However, it is known that the density of the image increases with the energy of radiation and IX-FR usually has more density than UM-MA HC. Therefore, the subject and the type of investigation should influence the choice of film.},
 pages = {85--94},
 title = {〔報文〕文化財の透過X線撮影におけるマンモグラフィ用フィルムの特性},
 year = {2007}
}