Spring 2012 Flashcards
The penetrating power of the xray is determined by:
kilo-voltage
A definition of Radiographic contrast would be:
tonal relationship between one density and another
The distance between the parts to be radiographed and the image receptors is commonly referred to as:
OID = object image distance
Which exposure parameter will not increase the amount of density of a radiograph
increased focal film distance
Doubling the focal film distance requires ___ to compensate and maintain the film density.
4x the mAs
The “ten day rule” for females of child bearing age refers to performing non emergency abdominal pelvic xrays:
during the 10 days after the onset of menstruation
The principle electrostatic law implies…
an electron will repel an electron
The function of a screen is to
convert xrays to light
Of the following, which type of radiation is the major constituent (largest portion) emitted from the target?
Bremestrahulung Radiation
According to lecture, which of the following is the most frequent cause of repeat radiographs?
Under exposure
What exposure factor will produce the most radiographic contrast?
highest mA, lowest kV
In order to maintain density, miliaperage and exposure time are found to be ___ each other?
inversely proportional to
A ___kV change is the minimum necessary to produce noticeable (minor) change in penetration on a radiograph from the original used at 5.5 kV
10% –> 5kV
An increase in radiograph factors from the normally expected radiographic chart would be required when a patient has which of the following contraindications?
Emphysema
What corrections should be made for an AP projection of the pelvis if the greater trochanters are seen partially overlapping the femoral necks?
Invert the lower extremity 15
