CT REGISTRY REVIEW 2024 QUESTIONS WITH 100% CORERCT ANSWERS

CT REGISTRY REVIEW 2024 QUESTIONS WITH 100% CORERCT ANSWERS d) digital subtraction angiography - Correct Answer ️️ -CT is commonly referred to as all of the following names except: A)computer tomography B)computerized axial tomography C) CAT-scan D)digital subtraction angiography c) the energy level & quantity of x-rays can be selected - Correct Answer ️️ -What control does the operator have over the x-rays in a CT exam: A)the temp & color of the x-rays can be tuned B)the phase & frequency of the x-rays can be adjusted C)the energy level & the quantity of x-rays can be selected D)the volume & tone of the x-rays can be dialed c) both a & b are correct - Correct Answer ️️ -Which of the following statements is true: A)kV is the voltage potential between the tube cathode and anode while mA controls the filament current & thus ultimately the temperature of the cathode filament B)kV controls the energy level of the x-ray photons & emitted from the tube C)both a & b are correct D)none of these c) the type of detector material used - Correct Answer ️️ -Which of the following does not affect the quantity of x-rays that completely penetrates the patients: A)the distance that the x-rays must travel on their course through the patient's body B) the molecular composition of the tissues through which the x-ray photons pass C) the type of detector material used D) both a & b C) in a system with a low voltage slip ring, the high voltage generator is stationary during a scan - Correct Answer ️️ -Which of the following statements is false: A) the CT x-ray tube emits x-ray at the same time x-rays are measured by the detectors B) the CT tube rotates around the patient while projection data is acquired C) in a system with a low voltage slip ring, the high voltage generator is stationary during a scan D) none of these D) long scan times are more desirable because they average out motion - Correct Answer ️️ -Which of the following is false regarding the collection of CT data: A) the detectors measure only those x-rays which completely penetrate the patient B) to collect the complete set of CT data x-rays must be passed through the body at many diffrerent angles C) the reconstruction process used to create the image occurs in the array processor D) long scan times are more desirable because they average out motion C) array processor - Correct Answer ️️ -Which of the following component is not normally located in the gantry of a modern CT system: A) solid-state detector B) x-ray tube C) array processor D)pre-patient collimators C)they penetrate the body according to specific attenuation characteristics of each tissue - Correct Answer ️️ -Why are x-ray used in CT: A) they are easily produced by the high frequency generator B)they are less harmful then the heating effects of microwave radiation C)they penetrate the body according to specific attenuation characteristics of each tissue D) the FDA imposes no limit on the dose to the patient B) the electrons loses kinetic energy which is converted into the emission of an x-ray photon - Correct Answer ️️ -X-rays are produce whenever fast moving electron collide with any form of matter because: A) the electron splits into two x-ray photons of equal energy upon impact with matter B) the electrons loses kinetic energy which is converted into the emission of an x-ray photon C) the electron converts the electron it coilildes with into an x-ray photon D) all of these B) collision between an incoming electron and an electron in an inner shell of the target atom - Correct Answer ️️ -Bremsstrahlung radiation does not include which type of electron activity: A) collision between an incoming electron and the nucleus of the target atom B) collision between an incoming electron and an electron in an inner shell of the target atom C) slowing down of an incoming electron due to the effect of passing close to the positive charge of the nucleus of the target atom D) all of these A) it has an high atomic number an a high melting point - Correct Answer ️️ -Which of the following is the reason why tungsten is used as the target material on the tube anode: A) it has an high atomic number an a high melting point B) it has an low atomic number and a high melting point C) it has an high atomic number and an a low melting point D) it has an low atomic number and a low melting point C) many more x-rays are produce from general radiation than those from characteristic radiation - Correct Answer ️️ -What are the many reason that the majority of x-rays used in CT are derived from general radiation and not from characteristic radiation: A) characteristic radiation introduces artifacts in the images B) general radiatio