Magnetic uses a magnetic field, radio waves and a

Magnetic resonance imaging (MRI) is an imaging technique that uses a magnetic field, radio waves and a computer to produce detailed pictures of the body. MRI is a noninvasive imaging technique that does not involve exposure to ionizing radiation. This technique can be helpful to diagnose and monitor various conditions. This method delivers a much more detailed picture. This scan uses a strong magnetic field and radio waves to generate images of the body. By giving radiofrequency pulses, protons will spin in-phase and they will detected and processed into the MRI computer. tomography (CT) is a computerized X-ray imaging procedure where a narrow beam of X-rays is aimed at a patient and quickly rotated around the patient’s body, producing signals that are going to be processed by the machine’s computer to generate cross-sectional images of the body. Afterwards, the cross sectional images are assembled into a 3D picture making it easier to find the exact place where a problem may be located.  CT scans can be used to identify disease or injury within various regions of the body. For example, CT has become a useful screening tool for detecting possible tumors or lesions within the abdomen. tomography (PET) Is a nuclear medicine functional imaging technique that is used to observe metabolic process in the body. It measures physiological function by looking at blood flow, metabolism, neurotransmitters, and radiolabeled drugs. PET offers quantitative analyses, allowing relative changes over time to be monitored as a disease process evolves or in response to a specific stimulus. The technique is based on the detection of radioactivity emitted after a small amount of a radioactive tracer is injected into a peripheral vein. spectrometry imaging (MSI) is a powerful tool for directly determining the distribution of proteins, peptides, lipids, neurotransmitters, metabolites and drugs in tissue sections in situ. Molecule-specific imaging can be achieved using various ionization techniques that are suited to different applications but which all yield data with high mass accuracies and spatial resolutions. Lecture 15/01A biopsy is the extraction of a small sample of tissue in order to examine it for disease. The tissue samples can be taken from any part of the body. Biopsies are performed in several different ways. Often, the tissue is removed by placing a needle through the skin (percutaneously) to the area of abnormality. This technique is usually combined with microscopy and CT, as these imaging techniques can be used to determine where to perform the biopsy or, following the biopsy, to analyze the specimen. is an imaging technique used to view objects and areas that are not visible with the naked eye. There are different types of microscopy. Optical (light) microscopy is a technique that allows to closely view a sample through the magnification of a lens with visible light. Electron microscopy, uses a beam of electrons to create an image of a specimen. Lecture 8/01