What is attenuation in the lung?
The increased lung attenuation pattern develops when the amount of air in the airspaces and in the lumen of the airways decreases (resulting from lung volume decrease or from partial or total filling of the airspaces) and when the soft tissue structures increase in size and/or amount, two phenomena that often occur …
What is mosaic pattern?
A mosaic is a pattern or image made of small regular or irregular pieces of colored stone, glass or ceramic, held in place by plaster/mortar, and covering a surface. Mosaics are often used as floor and wall decoration, and were particularly popular in the Ancient Roman world.
What does attenuation mean medically?
Medical Definition of attenuation
: a decrease in the pathogenicity or vitality of a microorganism or in the severity of a disease. attenuation.
What is small airway disease?
Small airway disease (SAD) is a recognized feature of COPD9,10,11 and has been characterized by pathology, imaging, and physiological studies. The small airways are <2 mm diameter, and there is a dramatic increase in small airway resistance in COPD patients compared to controls12.
What does high attenuation mean?
Areas of high attenuation (visually as opaque as bony structures) in an abnormality on CT scans can be an important clue to the correct diagnosis. The high attenuation is most often caused by calcification, but may also be due to iodine, barium, or radiopaque foreign bodies.
What is mosaic period?
The Mosaic age lasted from the giving of the Law at Mount Sinai until Jesus died (a period of nearly 1,600 years). Thus, the Mosaic Law is NOT in effect today. Christians need NOT obey its 613 laws and regulations. The entirety of the Old Testament Law of Moses was fulfilled by Jesus’ sacrifice and nailed to the cross.
What is a mosaic artwork?
mosaic, in art, decoration of a surface with designs made up of closely set, usually variously coloured, small pieces of material such as stone, mineral, glass, tile, or shell.
What causes attenuation?
Attenuation is the reduction in power of the light signal as it is transmitted. Attenuation is caused by passive media components, such as cables, cable splices, and connectors. … Dispersion is the spreading of the signal over time.
What does low attenuation mean on CT scan?
Attenuation is a feature of CT, and low attenuation means that a particular area is less intense than the surrounding. All of the malignant nodules confirmed by biopsy have low attenuation, with the exception of two which have a mixture of high and low attenuation.
What does attenuation mean in CT scan?
Attenuation Defined. Attenuation is the measurement of energy absorbed and deflected as it passes through a medium. In simpler terms, attenuation is how much stopping power a material has on energy.