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Need an argumentative essay on Diffusion Tensor Imaging (DTI). Needs to be 6 pages. Please no plagiarism.Download file to see previous pages... In a pure liquid, water molecules can move freely in all
Need an argumentative essay on Diffusion Tensor Imaging (DTI). Needs to be 6 pages. Please no plagiarism.Download file to see previous pages...
In a pure liquid, water molecules can move freely in all three dimensions whereas it is not possible in case of tissues. Conventionally, T2-weighted MRI images were used to identify muscle strains. These MRI images were capable of optimising contrast between injured muscles and normal uninjured muscles. Recently, the DTI was invented as a more accurate method for identifying muscle damage as compared to the T2 weighted MRI. The DTI variables exhibit a strong and quick response to damage whereas the T2 signal may take a prolonged period to respond to the change. According to a recent research conducted in the United States, “diffusion tensor imaging based muscle fibre tracking enables the measurement of muscle architectural parameters, such as pennation angle (theta) and fibre tract length (L(ft), throughout the entire muscle” (Acton, 2011, p. 949). Experts opine that the DTI technique can be effectively deployed to examine the three dimensional architecture of the skeletal muscle and get exact information regarding muscle damage. The DTI based muscle fibre tracking method has the potential to reconstruct muscle architecture and, hence, it can be considered as one of the most potential inventions of medical science. As Sinha and Sinha (2011) point out, one of the most significant advantages of this technique is that the diffusion tensor images have the potential to support larger volume imaging without centring and repositioning the magnet value. In case of elongated structures like muscle fibres, the diffusion coefficient of water is higher along the fibre. By taking diffusion measurements in at least six directions, it is possible to calculate a diffusion tensor and which in turn would be beneficial to extract the main direction of the diffusion. Subsequently, this directional information can be integrated into neighbouring pixels to facilitate fibre trajectory reconstruction. In the view of Heemskerk, (2009), this process is helpful to estimate muscle architectural parameters including fibre length, pennation angle, and psychological cross sectional area. In addition, the DT-MRI muscle fibre tracking is a potential method to take pennation angle measurements of human muscle. The DTI based muscle fibre tracking technique is still at its developmental stages and this process offers greater future scope. MRI techniques for cartilage imaging Recently, a number of advanced MRI techniques have been developed with intent to facilitate more accurate imaging of cartilage. Major MRI techniques for cartilage imaging include hip imaging, parallel imaging, delayed gadolinium-enhanced MRI of cartilage (DGEMRIC), high resolution MRI, sodium MRI, T1p relaxation, and T2 relaxation. Most of these methods are very effective in applying cartilage imaging. Hip imaging is specifically demanding due to the joint’s spherical nature, thin articular cartilage, and deep anatomical position (Kim &. Mamisch, 2008). As Hitt and Meel (2009) point out, this technique is mainly used for the examination of the acetabulum and acetabular labrum. Hip imaging is generally acquired in the specified ‘axial, coronal, and sagittal planes’ (ibid). The hip imaging technique will provide ‘true parallel slices of the acetabulum, acetabular labrum, femoral head and neck, and trochanter anatomies’ (ibid).