Intro to Diagnostic Imaging
This is the negative side of the x-ray tube.
What is the cathode?
This acronym stands for "as low as reasonably achievable."
What is ALARA?
This is the anatomical landmark for the cranial collimation border for thoracic radiographs.
What are the shoulder joints?
This factor represents the quantity of x-ray photons produced.
What is mA? (or What is milliamperage?)
This is the radioisotope used to image and treat hyperplastic feline thyroid tissue.
What is iodine-131?
This structure is housed within the focusing cup of the cathode
What is the filament?
This is the primary source of radiation exposure for radiation workers.
What is scatter radiation?
This is the recumbency required for taking a posterior/anterior (or caudocranial) image of a small animal stifle joint.
What is sternal recumbency?
This artifact is minimized when the object is as close to the image receptor as possible.
What is magnification?
This imaging modality uses a strong magnetic field and radio waves to produce an image.
What is magnetic resonance imaging?
These are the subatomic particles super-heated to produce x-rays.
What are electrons?
This instrument measures absorbed radiation.
What is a dosimeter?
This artifact occurs when the primary x-ray beam is not perpendicular to the area of interest
What is distortion? (or What is elongation?)
This is the relative level of contrast preferred for radiographing bone
What is high contrast?
This imaging modality that uses radioisotopes to localize areas of increased cellular metabolism.
What is nuclear scintigraphy?
This is the most prevalent type of energy produced within the x-ray tube.
What is heat?
This is the part of the cell that is most vulnerable to the affects of ionizing radiation.
What is DNA?
The caudal borders of the scapulae are the anatomical landmarks this.
What is the center beam position for thoracic radiographs?
This is the adjustment to kVp needed to decrease contrast.
What is increase kVp (by at least 15%)?
This "tissue" type appears gray on radiographs and black on ultrasound.
What is fluid?
This is the concept that the density of x-rays emitted from the x-ray tube is higher nearer to the cathode.
What is the Heel effect?
This term refers to the ability of radiation to transfer energy into tissue.
What is linear energy transfer?
This is what you see in the radiograph if the femurs are adequately rotated in an extended-leg V/D pelvic radiograph.
What are the patellas centered in the trochlear grooves of the distal femurs?
This is the adjustment needed when penetrability is good, but the image is too light.
What is increase mAs (by 2x)?
This is used in diagnostic imaging to enhance the visibility of structures what are otherwise difficult to differentiate.
What is contrast (media)?