 In 2004, experts from the National Research Council of Canada conducted a three-dimensional infrared scan.Because of the aging of the varnish on the painting it is difficult to discern details.Data from the scan and infrared were used by Bruno Mottin of the French Museums' "Center for Research and Restoration" to argue that the transparent gauze veil worn by the sitter is a guarnello, typically used by women while pregnant or just after giving birth.