Define These Computed Tomography Registry Flashcards

Tungsten is used as a terget material on the tube's anode b/c it has a _____ atomic number and a ____ melting point.

________ scanner design was the first to acquire four slices in a single rotation.

The enormous heat that builds up in the CT tube is caused by the:

The number of electrons that flow from the cathode to the anode in the tube is controlled by the:

The slip ring on continuous rotation CT scanners:

Which of the following is not part of the CT tube? tungsten target collimator rotating anode filament

Which of the following are NOT commonly used on today's commercially available CT scanners? xenon detectors fourth generation technology continuous rotation technology

What system component converts the projection attenuation data into the proper digital form for the arrray processor?

X-ray photons are produced by a fast moving electron: colliding with an atomic nucleus passing close to an atomic nucleus colliding with an electron witin an atom and ejecting it

Which of the following is TRUE regarding solid states detectors? x-ray photons cause the detectors to generate a flash of light they are the detector type used on most CT scanners today they can be used in both third generation and fourth generation CT systems

CT is commonly referred to as all of the following names EXCEPT: computerized axial tomography digital subtraction angiography CAT - scan computed tomography

What control does the operator have over hte x-rays in a CT exam?

Which of the following statements is TRUE? kV is the voltage potential between the tube cathode and the anode while mA ultimately controls the filament current and,thus, the temperature of the cathode filament. kV controls the energy level of the x-ray photons and mA controls the number of x-ray photons emitted from the tube although the kV and the mA affect the operation of the CT x-ray tube,the two parameters have no bearing on the image quality

Which of the following does NOT affect the quantity of x-rays that completely penetrates the patient? the distance that the x-ray photons must travel on their course through the patients body the molecular composition of the tissues through which the x-ray photons pass the type of detector material used

__________made helical imaging possible.