In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. For instance, sunlight is attenuated by dark glasses, X-rays are attenuated by lead, and light and sound are attenuated by water.n engineering, attenuation is usually measured in units of decibels per unit length of medium (dB/cm, dB/km, etc.) and is represented by the attenuation coefficient of the medium in question.
PET Scan (Skull to Mid-Thigh) Cost and Procedure Information. Positron Emission Tomography, also called a PET scan, is a diagnostic examination that involves the acquisition of physiologic images based on the detection of radiation from the emission of positrons. Positrons are tiny particles emitted from a radioactive substance administered to the patient.
In this case, the term usually suggests that the facet joint is larger or greater than normal due to increased size of the bony projection and the ligaments that are all part of the facet structure. This change of facet hypertrophy usually occurs as one of the first signs of spinal osteoarthritis. Arthritis causes the body to deposit new bone to these joints in an attempt to make these joints stronger and not break down. Interpretation. Basically, your spinal joints have worn out a little bit.