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: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
Answer:
Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.
Explanation:
Answer: Biopyschosocial model
Explanation: The biopsychosocial model debates that not any one factor is sufficient; it is the cooperation between people's biology, psychology, as well as social and cultural context that can "interfere" with their health outcomes.
the abnormalities the nurse can document during the otoscopic examination are immobility of the tympanic membrane and middle ear effusion.
<h3>What is otoscopy?</h3>
Otoscopy can be defined as a clinical procedure used in the examination of the structures of the ear, particularly the external auditory canal, tympanic membrane, and even the middle ear.
Clinicians carryout otoscopy during routine wellness physical exams and the evaluation of specific ear complaints
During the otoscopic examination, the clinician utilizes an otoscope, also to see through or to visualize the ear anatomy.
The abnormalities that can be documented include;
- Immobility of the tympanic membrane moves in response to pressure.
- The detection of middle ear effusion
Thus, the abnormalities the nurse can document during the otoscopic examination are immobility of the tympanic membrane and middle ear effusion.
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