6 How X-rays are produced accessory equipments Flashcards
What is an X ray?
Form of EM radiation that can penetrate matter and cause biological damage
X rays move at the speed of light, vary in energy and wavelength, can cause fluorescence, and can expose film.
What is the function of the cathode in an X ray tube?
Source of electrons, consisting of a tungsten filament and a negatively charged concave cup
The cathode is responsible for thermionic emission, where current heats the wire and electrons escape.
What is the purpose of the anode in an X ray tube?
Target for electrons to strike, typically made of tungsten
The anode can be stationary or rotating to manage heat.
What is the Anode Heel Effect?
The angled surface of the anode allows for better cooling and maintains detail
X rays on the cathode side are more intense, affecting imaging practices.
What does mAs stand for?
Milliampere-second
It determines the quantity of X rays produced based on current applied and time.
What does kVp stand for?
Kilovoltage peak
It determines the speed of electrons and the quality of X rays produced.
What is the role of filtration in an X ray tube?
Radiation safety
Filtration helps to reduce unnecessary exposure to radiation.
What is Radiation Therapy?
Uses radiation to treat neoplastic and some benign diseases
Requires special training and may use cobalt or linear accelerators.
What is Nuclear Scintigraphy?
Uses gamma rays to produce images emitted from the patient
Involves administering a radioactive nuclide to assess metabolic activity.
What is Magnetic Resonance Imaging (MRI)?
Uses a strong magnetic field and radiofrequency waves to image structures
MRI is great for soft tissue and does not use ionizing radiation.
Who discovered X rays?
Wilhelm Conrad Roentgen
He discovered X rays on November 8, 1895, and received the Nobel Prize for Physics in 1901.
What is the difference between static and dynamic images in radiology?
Static images are still, while dynamic images involve fluoroscopy
Contrast agents like barium and iodine are often used in studies.
What is Computed Tomography (CT)?
Uses X rays to produce cross-sectional images with no superimposition of structures
Requires computer manipulation of images.
What is Ultrasonography?
Uses sound waves to produce images by sending out and listening for echoes
It is operator-dependent and cannot penetrate air or bone.
What is the Journal of Veterinary Diagnostic Imaging?
A journal that highlights veterinary diagnostic imaging
It serves as a resource for advancements and research in the field.
