As an x-ray tube ages, the inside can become coated with tungsten, which can cause arcing in the tube.
When there is a short circuit inside the tube, usually from the cathode to the tube envelope, tube arcing happens. A brief loss of x-ray output and a localised artefact are the consequences. On transaxial computed tomography (CT) scans, it appears as a near-parallel, equidistant streak pattern, and on coronal and sagittal CT images, as a "horizontal" hypodense band.
The most frequent cause of x-ray tube failure is an inability to effectively disperse the heat produced during routine operation. It is common knowledge that at the anode target, heat accounts for 99% or more of the kinetic energy given to the electron beam.
Therefore, an x-ray tube ages, the inside can become coated with tungsten, which can cause arcing in the tube.
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Answer:
Yeah true
Explanation:
In non steroid hormones the secondary messenger is Ca2+, IP3( Inositol triphosphate ), or cyclic AMP.
Answer:
skeletal
circulatory
respiratory
digestive
immune
endocrine
nervous
muscular
Explanation:
skeletal- bones, spinal cord
circulatory- blood, vessels, heart,
respiratory- trachea, nose, lungs
digestive- intestines, stomach, oesophagus,mouth
immune- cells, organs, tissues
endocrine- kidney, bladder, urinary, glands
nervous- nerves, brain
muscular- muscle
