## 4 Discussion
Nowadays, CT has become an important investigative tool and is a primary imaging technique for detecting acute traumas in human medicine. The physical principles of computed tomography (CT) imaging are complex. Both a CT and a micro-CT scanner employ an X-ray beam. In a CT device, the X-ray source rotates along a circular pattern with detectors rotating on the opposite side, whereas, in micro-CT, the X-ray tube and detector are fixed while a sample rotates on a table [56, 57]. A micro-CT device has a microfocus X-ray tube, thanks to which power can be increased to 320 W. The other nanofocus X-ray tube enables the detection of elements as small as 0.2 um [58, 59]. Although CT may aid the diagnosis of an almost endless list of diseases, the possible manifestations of these diseases in images are limited [6]. A complex computer system utilises algorithms and mathematical formulae to process data into a 3D image or to generate a large number of two-dimensional slices. The computer system analyses the data on the basis of geometrical plots and assigns Hounsfield units (HU) to reconstruct the image. X-rays are absorbed by different materials to a varying degree [1, 4, 56, 57, 58, 59]. If the density of a particular tissue, organ, or lesion increases, so does the absorption, which results in increased attenuation of the X-ray beam. The tissue which appears less opaque than normal is hypoattenuating. It may contain fresh blood (haemphage), cystic, necrotic, fatty, or oedemaous infiltration [8, 60]. The tissue which is more opaque than normal is hyperattenuating. It may contain fibrin and clot retraction or mineral or iodinated contrast medium. The cells which are densely fibrotic have a high nuclear/cytoplasmic ratio [56]. The attenuation of muscles is similar and yields the same HU value. Bone X-ray is the most widely available bone structure visualisation technique in veterinary practice. It provides qualitative information on bone density, fractures, injuries, and joint abnormalities. Another advantage of a traditional X-ray radiograph is its use of a very small dose of ionising radiation to produce pictures. Therefore, the main limitation of CT is radiation exposure [6]. As in small animal practice, CT and US are the techniques that provide sectional images of anatomic structures of the object [1, 4, 5, 60, 57, 56, 1, 10, 39, 50, 61]. Both of them are highly accurate and sensitive in diagnosing bone and muscle lesions. Magnetic resonance imaging can be applied as a complementary technique because this imaging modality proved to be useful for the evaluation of joint morphology in other animals [16, 18]. In order to interpret CT and MRI and compare them with ultrasound and gross anatomical dissection, a particularly rare species was used to verify the results--the sagittal planes of the right forearm of the marmoset. The results of other tests should be collected as a point of reference for the _L. chrysomelas_ species. Most authors recommend using multiple diagnostic techniques to plan the treatment of animals. Therefore, various techniques have been developed to teach students at veterinarian schools and in professional training. All cases are important to comparative anatomy and must be taken into account in clinical, surgical, and orthopaedic approaches to each part of the forearm.