Before MRI got introduced by the biomedical engineers, various pathological problems were left overlooked and went undetected since the feature of nuclear magnetic resonance (NMR) did not happen to be a characteristic found in other imaging technologies. Introduction of NMR through MRI technology brought a revolutionary turn in clinical practice since it enabled the physicians to produce images by imaging nuclei of atoms inside the body. Imaging nuclei of atoms within the suspicious anatomical region which is intended to be imaged through MRI require a magnetic field and intricate knowledge about pulses of radio wave energy. It remains worth mentioning that they need to develop close familiarity with complex theories regarding pulses of radio wave energy so as to produce perfect visual images of at-risk structures within the body. A slight deviation from the established norm about using MRI equipment can lead to disastrous results such as different information may reach the physician leading him/her to make the wrong diagnosis. This carelessness and naivety displayed on the part of technologists are potential of heavily interfering with the most distinguished feature of MRI, which is that it can show such obscured contagious problems within the human body which are impossible to be visualized with other imaging techniques. “Policies and procedures must be implemented to continue appropriate physiologic monitoring and management of the patient by trained personnel after the MRI procedure is performed”. ” (Shellock, 2011). Having the status of a relatively new and amazing technology to hit the medical world, MRI is also considered to be a totally non-intrusive medical imaging technology. It is particularly capable of producing high-resolution visual images of internal at-risk structures which rules out the need to use x-rays since it employs radio frequency pulses, as mentioned before and which also rules out any significant post-imaging health risks which are often associated with many other imaging techniques (Disher et al., 2006). Another worth mentioning characteristic of MRI is that in addition to providing technical flexibility like making adjustments to perfect the contrast between soft tissues after scanning is done, virtually no ionizing radiation is used which sets this imaging technique in contrast to others like CT and x-rays (Keevil, 2001). The riveting ability to provide a highly appreciated contrast between different soft tissues of the body so as to highlight the grave abnormalities, no matter how small they may be, makes MRI the choice of investigation in many cases especially if cancers in brain, muscles, and heart are to be imaged. For example, using contrast agent during MRI for detecting pathological changes in brain, spine, heart or bones can help visualizing the abnormal tissue more explicitly. In addition to prov
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An essay "Medical Resonance Imaging" claims that myriad miraculous and astounding advances made by genius humans in the profoundly important and vast field of biomedical imaging have undeniably brought prodigious changes in the way clinical medicine is perceived today. …
Functional magnetic resonance imaging or fMRI is a process of mapping brain activities by analysing the modifications in blood flow and oxygenation levels that vary according to neural activities taking place within the brain (Huettel, Song and McCarthy, 2009).
Because of these, patients who undergo MRI may suffer from high-level acoustic noise, heating and accidental projectiles. Emotional distress, anxiety and lack of immobility are thus very likely, especially among children. Since movement lessens the quality of MRI images, use of sedation or general anesthesia is warranted to increase tolerance to an unpleasant but necessary procedure, and to expedite MRI imaging of a distressed patient (Shellock, 2011; Medical Advisory Secretariat, 2003).
However, it is necessary to assume that the frequency of the true resonance will depend on the actual value (local) of the magnetic field in operations. On the other hand, McRobbie, et al, argues that it is also necessary to note that the magnetic field must be uniformly designed, and temporarily superimposed on the focal static field.
This paper hereby states the purpose of the article as a description of blood-oxygenation-level dependent contrast; its clinical applications, patient safety and research facilities. Finally, fMR imaging’s manifestation and implication as a window to the brain was expounded for medical practitioners’ use.
Figure 1 shows an example of an MRI image from a moving patient. In such cases, use of sedation or general anesthesia is warranted to increase tolerance to an unpleasant but necessary procedure, and to expedite MRI imaging of a distressed patient (Medical Advisory Secretariat, 2003; Shellock, 2011).
“EPI is fundamentally just a trick of spatial encoding” (Cohen, 2000, p.3). EPI is a speedy, elastic method of imaging. It has high-quality contrast and resolution capabilities, and also possesses many prospective applications in clinical imaging, including functional MRI and rapid whole brain imaging.
The amalgamation of both practices is tremendously encouraging for the primary recognition and valuation of stroke, for tumour description and for the estimation of neurodegenerative illnesses (Nelson, et al., 1995). Perfusion applications are intended to evaluate the distribution of blood to a vascular bed.
Diffusion weighted imaging (DWI) is an MRI sequence designed to measure the random movements of water particles to further assess different tissue characteristics such as membrane permeability. By virtue of the kinetic
When in use, the machine takes images of the target organ in various angles which are then processed using a computer to yield a picture of high detail of the area selected for observation. Basically therefore, the technique makes use of a computer, an
6 pages (1500 words)Essay
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