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Croup (/ k r uː p / KROOP), also known as croupy cough, is a type of respiratory infection that is usually caused by a virus. [2] The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice. [2]
On lateral C-spine X-ray, the thumbprint sign describes a swollen, enlarged epiglottis. [10] A normal X-ray, however, does not exclude the diagnosis. [10] An ultrasound may be helpful if specific changes are present, but its use (as of 2018) is in the early stages of study. [10] On CT imaging, the "Halloween sign" describes an epiglottis of ...
A calcaneal spur (also known as a heel spur) is a bony outgrowth from the calcaneal tuberosity (heel bone). [1] Calcaneal spurs are typically detected by x-ray examination. [2] It is a form of exostosis. When a foot is exposed to constant stress, calcium deposits build up on the bottom of the heel bone. Generally, this has no effect on a person ...
The X-rays themselves are produced by the rapid deceleration of electrons in a target material, typically a tungsten alloy, which produces an X-ray spectrum via bremsstrahlung radiation. The shape and intensity of the beam produced by a linac may be modified or collimated by a variety of means.
Plantar fasciitis or plantar heel pain is a disorder of the plantar fascia, which is the connective tissue that supports the arch of the foot. [2] It results in pain in the heel and bottom of the foot that is usually most severe with the first steps of the day or following a period of rest.
An illustration of the heel effect in an x-ray tube. In X-ray tubes, the heel effect or, more precisely, the anode heel effect is a variation of the intensity of X-rays emitted by the anode depending on the direction of emission along the anode-cathode axis. X-rays emitted toward the anode are less intense than those emitted perpendicular to ...
X-ray of the foot of an 11-year-old child, showing sclerosis and fragmentation of the calcaneal apophysis. This is a sign of low sensitivity and specificity of Sever's disease, because those with Sever's disease may not have it, and this appearance is also present in feet without pain. [1] Specialty: Rheumatology Symptoms: in the heel
Symptoms may include pain, bruising, trouble walking, and deformity of the heel. [1] It may be associated with breaks of the hip or back. [1] It usually occurs when a person lands on their feet following a fall from a height or during a motor vehicle collision. [2] [1] Diagnosis is suspected based on symptoms and confirmed by X-rays or CT ...
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