Non-Invasive Diagnostic Techniques

Non-Invasive diagnostic techniques X-rays An X-ray machine is essentially a camera. Instead of visible light, however, it uses X-rays to expose the film. X-rays are like light in that they are electro magnetized waves, but they are more energetic so they can penetrate mevery materials to transfering degrees. When the X-rays resuscitate the film, they expose it just as light would. Since bone, fat, muscle, tumors and opposite masses all absorb X-rays at diametric levels, the image on the film lets you see divergent (distinct) structures inside the body because of the different levels of exposure on the film. Ultrasound Ultrasound or ultrasonography is a medical imaging technique that uses high relative frequency sound waves and their echoes. The technique is similar to the echolocation apply by bats, whales and dolphins, as well as asdic used by submarines. Thermography magnetised resonance imaging MRI scanners vary in size and shape, and some newer models have a greater degree of openness around the sides. Still, the basic design is the same, and the diligent is pushed into a piping thats plainly about 24 inches (60 centimetres) in diameter.The biggest and most beta component of an MRI frame is the magnet. There is a horizontal tube the same one the patient enters running through the magnet from front to back. This tube is known as the bore. But this isnt just any magnet were dealing with an incredibly untroubled system here, one capable of producing a large, stable magnetic knit stitch of view. The strength of a magnet in an MRI system is rated using a unit of monetary standard known as a tesla.Another unit of cadence commonly used with magnets is the gauss (1 tesla = 10,000 gauss). The magnets in use now in MRI systems create a magnetic field of 0. 5-tesla to 2. 0-tesla, or 5,000 to 20,000 gauss. When you realize that the Earths magnetic field measures 0. 5 gauss, you can see how powerful these magnets are. about MRI systems use a superconducting magnet, which consists of many coils or windings of wire through which a current of electricity is passed, creating a magnetic field of up to 2. 0 tesla.Maintaining such a large magnetic field requires a good deal of energy, which is accomplished by superconductivity, or reducing the resistance in the wires to some zip. To do this, the wires are continually bathed in liquid helium at 452. 4 degrees below zero Fahrenheit (269. 1 below zero degrees Celsius) source Coyne. This frigidness is insulated by a vacuum. While superconductive magnets are expensive, the strong magnetic field allows for the highest-quality imaging, and superconductivity keeps the system economical to operate.