Terminology Flashcards
Anode
Positively charged target in X-ray tube
Cathode( filament end)
Negatively charged target of X-ray machine
Most versatile device for defining the size and shape of the radiography beam
Collimator
ALARA
As low as reasonably achievable
Divides the body lengthwise into right and left portions. Cut exactly down the midline of the body, the right and left halves of the body are equal
Sagital plane
Divides the body into anterior and posterior portion the frontal plane is called the coronal plane
Frontal plane
Divides the body horizontally creating an upper (superior) and lower (inferior) body
Transverse plane
The skeletal systems consist of
bones joints cartilage and the ligaments associated with the joints
How many bones in the human body
206
Long bones
Longer than they are wide they are found in arms and legs
Short bones
Shaped like cubes and are primarily found in wrist and ankles
Flat bone
Thin. Flat and curved they form the ribs breast bones and skull
Irregular bones
Differently shaped and are not classified as long short or flat includes the hip bones , vertebrae and various bones in the skull
Peak kilovoltage(kVP)
The highest energy level of photons in the X-ray beam controls the quality or penetrating power of the photons in the X-ray beam
Milliamperes-seconds(más)
Product of electrons tube current and the amount of time in second that the X-ray tube activated is the main determinant of how much radiation is directed towards a patient during exposure.
Most versatile device for defining the size and shape of the radiography mic beam
Collimator
The prefix kilo stands for
1,000
Which prefixe stands for 1/1000
Milli
Atoms
Are the building blocks of all matter
What element is both the filament and target made of
Tungsten
Process of heating tungsten to expand the electron orbits until they create a space charge
Thermionic emission
The space charge around a heated tungsten atom is____ charged
Negatively
When incoming electrons collide with the target, what are the 2 main type of radiation that occur
Bremsstrahlug and characteristics
Ionizing radiation
Is radiation that when passing through the body produces positively &negatively charged particles
Radiation protection
Is the measures taken to safe guard patient, personnel and the public from unnecessary exposure to ionizing radiation
Airkerma
SI unit term for radiation exposure measure of the radiation intensity in air
Measured with an ionizing chamber
Exposure- X-ray that are in the air between the X-ray tube & the patient
Absorbed does
Is the amount of energy absorbed by the irradiated tissue
Gy- t
Exposure
Mean radiation in air absorbed dose or dose used it mean absorbed does in the body
Exposure
Air kerma
(Gy-a)
Absorbed dose
Gray (Gy-t)
Sievert (SV)
is the si systems unit of dose equivalent
Milli & sv 0.200sv=200 msv
Linear energy transfers (let)
Is the amount of X-ray energy transferred on average per the length off passage through tissue
Oxygen enhancement ratio ( oer)
Is another concept that describes radiation absorbed in tissues
Milliamperes (mA)
Is a unit that represents the rate at which X-ray are produced
When the direction of the movement changes the direction of the current flow is reversed creating Ac
Electromagnetic induction
Spatial resolution refers to the sharpness of the radiographic image
It is primarily controlled by the OID , Sid , focal spot , motion, and quantum mottle