| 摘要 |
A flat transparent overlay for measurement of equine parasgital foot section x-rays is provided with a flat lower edge for parallel alignment with a ground surface and at least a portion of an anterior edge angled at an inclination approximating a hoof distal wall. A first sight ring is provided for positioning of the tool over a tip of a third phalanx image. A first scale extends posterior at a selected angle from the first sight ring for measurement of the palmar cortex. A second scale depends from the first sight ring substantially perpendicular to the lower edge for measurement of the distal sole thickness. A third scale extends anterior perpendicular to the second scale for measurement of the break-over distance. A first protractor element is centered posterior on the first sight ring for measurement of the palmar angle. A dual scale is provided having a lower scale extending substantially radially from the first sight ring and a parallel scale upwardly spaced from the lower scale, the dual scale extends substantially perpendicular to the angled anterior edge portion and a measurement line extends between an origin on each of the lower and parallel scales for measurement of the hoof-lamella zone. A fourth scale is upwardly displaced from the first sight ring for measurement of a coronet band to extensor process distance. A second sight ring is provided posterior to the first indicia and aligned therewith on a fifth scale having an origin at the first sight ring with the fifth scale substantially parallel to the ground surface for determining the center of rotation. A sixth scale depends from the second sight ring for measurement of the palmar sole thickness. A second protractor element is posterior to and centered on the second sight ring for measurement of a pastern angle.
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