Investigation of inner structure of Baird’s beaked whale specimen

Damaged Baird’s beaked whale specimen being X-rayed for investigation

 The Baird’s beaked whale specimen (Berardius bairdii : nickname “Tsutchy”) exhibited at the Rikuzentakata Sea and Shell Museum is a whale (total length is about 10m) that was stuffed to celebrate the meeting of the International Whaling Commission in Tokyo in 1954. The specimen was damaged by the great east Japan earthquake and tsunami on March 11th, 2011. After the primary inspection of damage at the museum on May 28th, 2011, the specimen was transferred to the Tsukuba Research Department of the National Museum of Nature and Science on June 30th, 2011. Currently, the project for restoration of the specimen is in progress.
 In this project, it is important to understand the structure of the timberworks and the location of corroded nails inside the specimen. At the request of the National Museum of Nature and Science, Masahide INUZUKA and Midori HAMADA investigated the inner structure of the specimen using X-ray radiography from October 16th to 18th and from 23rd to 25th, 2016. For this research, we used the developing equipment, which is dedicated to imaging plates that were introduced to our institute in 2015. Accordingly, we proceeded with the research by confirming the X-ray transmission images each time they were obtained.
 To investigate the overall inner structure of the specimen with the total length of about 10m, we obtained 375 X-ray images in total. The information about the structure of the timberworks and the location of corroded nails inside the specimen obtained from these X-ray images will be referred to during the investigation using an endoscope and the restoration works.

( / INUZUKA Masahide,HAMADA Midori)
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