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The aim of this study was the adjustment of one of the radiogram’s bone structure digital analysis methods, used at present for people, in order to use it in the investigation of horses’ proximal phalanx structures. Research was conducted based on radiograms of the bone of the fetlock belonging to horses of two races: thoroughbreds and Arabian horses. The values of parameters essential for the spongy bone fetlock, such as: the number of radiological trabeculas on mm², the average volume of the trabecula in mm% and the thickness expressed as percentage of surface coated with trabeculas. Analyses were carried out of the differences of each of the parameters of the structure of the essence of the spongy bone fetlock with regards to the race and the sex. The number, the volume and the thickness of radiological trabeculas of horses of thoroughbreds do not show essential differences to those of Arabian horses. Essential differences of these features among mares and stallions among thoroughbreds were not observed either.
The proximal phalanges, especially those of the thoracic limbs of horses, are the ones most exposed to injuries in the species. Due to unequal loading of the lateral pastern bones resulting from the specific training of racehorses in Poland and from the way races are conducted, the authors of the publication aimed at a detailed quantitative profile based on a radiogram analysis of the lateral proximal phalanges of the thoracic limbs of such horses. It seemed to be interesting also due to the fact that there is hardly any information in literature concerning asymmetry between the lateral long bones in the species. It turned out that the differences concerning the structure of the spongious substance between the bilateral pastern bones in the studied group of horses are not statistically significant. It was also stated that there is a strong positive correlation between the parameters mentioned above as far as the proximal phalanx of the right thoracic limb and the left one were concerned.
A novel diagnostic method was adapted from studies in horses and humans to postmortal research on ostrich bones. The research made it possible to determine referential values in the method of digital analysis of a radiological image for the tibio-tarsal bone of the ostrich, following exposure to injuries. In the case of a computer-generated analysis of a radiological image, the optimal conditions for taking images were selected, along with their digital record and processing: 0.096 mm/pixel, 256 greyness level (8 bits), and scanning in BMP (a bitmap that is an open format of raster graphics, a block of bytes, which describes an image pixel by pixel). The research was conducted on the rectangular-shaped (160 x 320 points) spongy bone taken about 80 mm below the articular surface near the proximal metaphysis. The research allowed defining parameters of the spongious matrix of the tibio-tarsal bone of healthy 14-month-old ostriches. The average number of trabeculae on lines was 10.41 mm² for both sexes, the average volume was 2.21 %, the density of the trabeculation (the percentage of the surface covered with trabeculae) was 47.44 % for both sexes and the average width of the trabeculae was 0.23 mm. On the basis of the conducted calculations, it is possible to draw a conclusion that the average number of radiological trabeculae, the volume of the trabeculae, and their density do not differ significantly for cocks and hens.
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