Our documentation comprises three videos (in the common MP4 format) with animated sequences of those images in each of the three sectional planes. The videos can be interrupted at any time to examine more closely any areas of particular interest. Demo videos which show an unattributed instrument which not only suffered severe damage but also underwent a very poor restoration are available in the download section.
In addition, we provide a PDF-file with several cuts in higher resolution, mainly at 1 cm intervals with special emphasis given to regions of interest (e.g. repair-work, alterations, damage).
To demonstrate the capability of our project you find a selection of slices through the body of the above mentioned instrument here. Due to the fact that the slices have a distance of 0.1 mm, the position of each section can be located with precision.
For instance, this cross-section (34.4 mm from the top of the body) shows severe deformation of the belly, several cracks, and the beginning of a huge patch on the back.
Cross-section at 78.3 mm from the top. Around the bass-bar, the top is very thin. The doubling of the back shows a very poor fit.
Cross-section at 130.7 mm from the top. Only at the edges is the big patch in contact with the back.
Cross-section at 206.6 mm from the top. The belly has a patch over the whole mid-section and several repairs. The top end of the soundpost probably has been chipped. The back has suffered severe cracks which are secured by a badly fitting patch (note the thick, bright line of glue.) On top of this repair-work we have the before mentioned doubling of the back.
A cut through the back at the soundpost-position: the crack, a small patch, and the unattached doubling are clearly visible.
The sagittal section through the soundpost area shows several cleats on the belly and the doubling of the back.
Thanks to the extremely high resolution of our µCT scans, the quality of restoration measures can be evaluated. The patch on the treble side has been applied with high pressure so that the soft parts of some of the annual rings have been squeezed. The glue joint of the patch on the bass side is brighter and therefore thicker than the other one, which means that the fit of this patch is not ideal. In both cases the original wood thickness has been reduced to around 0.4 mm.
