radio-imaging effectiveness

Radiation can be used for diagnosis and treatment. Radiation from radioactive isotopes may destroy tissues and therapeutic uses: destruction of cancer and other dangerous tissues. And by diagnosis, gamma particles pass through body tissues with minimal damage to the gamma camera. In order to evaluate the effectiveness of PET, SPECT, MRI and X-rays, we first need basic knowledge of how they function. PET represents a positron emission tomography scan and functions by collecting instruments that emit radiation from radioisotopes injected into the patient's body.

Magnetic Resonance Imaging (MRI) is a noninvasive diagnostic test that takes a detailed image of the soft tissue of the body. Unlike X-ray and CT, images are created using magnetic field, radio waves, computer. It just allows your doctor to see your spine and brain within the slice as if it were a layer slice and a picture of each slice. This test is useful for the diagnosis of tumors, stroke and disc herniation. MRI scans use powerful magnets, radio waves, computers to create detailed images. Your body is made up of millions of hydrogen atoms (the body is 80% of the water). And it is magnetic. When the body is placed in a magnetic field, these atoms align with the magnetic field, as the compass points to the North Pole. Radio waves "knock down" atoms and destroy those polarities. The sensor detects the time it takes for the atom to return to its original array

A magnetic field is generated and a radio wave pulse is transmitted from the scanner. The radio knocks out the nucleus of the body from its normal position. Once the nucleus is readjusted to the proper position, they emit radio signals. These signals are analyzed and received by a computer that converts them into an image of the body part being examined. This image is displayed on the display monitor. Some MRI devices look like narrow tunnels, but others are wider or wider. MRI for use with mammography and breast ultrasound can be a useful diagnostic tool. Recent studies have found that MRI can find small chest lesions that can be overlooked in mammography. It also helps detect women who have performed breast implants and breast cancers of young women who tend to have dense breast tissue. In such a case, mammography may not be very effective

Magnetic resonance imaging (MRI) is the most commonly used imaging procedure to diagnose Chiari malformations. It uses radio waves and powerful magnetic fields to generate detailed 3D images or 2D "slices" of body structures including tissues, organs, bones and nerves without pain. The most common procedure for treating Chiari malformation is posterior cranial decompression. It creates more space for the cerebellum and reduces pressure on the spinal cord. Surgery is to put an incision behind the head and remove a small part of the bone at the bottom of the skull (craniotomy). In some cases, the arch of the spinal canal, the upper part of the bone called the lamina can also be removed (spinal laminectomy). Surgery should help restore the normal body fluid flow of CSF and in some cases may be sufficient to alleviate the symptoms