ARRT Registry Review 1 Latest Update -

ARRT Registry Review 1 Latest Update - 200 Questions and 100% Verified Correct Answers Guaranteed A+

A 15% increase in which factor doubles exposure to the image receptor (IR)? -

CORRECT ANSWER: kVp

A patient walks into a radiology laboratory to undergo a chest x-ray examination for the first time. The patient asks the radiologic technologist, "Can I develop a radiation burn after the procedure?" What would be the best response from the radiologic technologist? - CORRECT ANSWER: "Not likely, radiation burn can sometimes occur from certain CT scans or with fluoroscopy, but not from a chest x-ray."

A radiographic procedure is performed at 150 mA for 120 ms. Which milliamperes (mA) setting results in the same exposure, but half the initial exposure time? - CORRECT

ANSWER: 300 mA

A radiologic technologist observes a large population with stochastic radiation effects, without having any precise knowledge of the radiation dose to which that population

was exposed. Which type of risk is described? - CORRECT ANSWER: relative risk

A woman underwent radiographic examination for her chest without being aware of her pregnancy. The radiographic variables set up in the radiographic unit are 110 kilovoltage peak (kVp) and 3 milliampere-seconds (mAs). What is the expected fetal dose? -

CORRECT ANSWER: 0 mrad

According to the target theory, which part of the cell must be inactivated? - CORRECT

ANSWER: Deoxyribonucleic acid (DNA) molecule

After testicular irradiation of doses exceeding approximately 100 mGy (10 rad), the male patient should refrain from procreation for what time period until all the cells that were in the spermatogonial and postspermatogonial stages at the time of irradiation have matured and disappeared? - CORRECT ANSWER: 2 to 4 months 1 / 3

All observations point to what period of pregnancy being the most radiosensitive period?

- CORRECT ANSWER: weeks 2 to 12

An element 'X' is represented as Xa. What does the subscript 'a' indicate in Xa? -

CORRECT ANSWER: Number of atoms

An exposure of 2 sievert (Sv) is received. How many radiation equivalent man (rem) is

this equivalent to? - CORRECT ANSWER: 200 rem

An imaginary line is drawn between the anterior superior iliac spine (ASIS) and the symphysis pubis. How should the radiographer use this line to localize the central ray location for an anteroposterior (AP) projection of a unilateral hip projection? -

CORRECT ANSWER: 2.5 inches distal to the midpoint of this line

An increase in which factor can increase x-ray quantity? - CORRECT ANSWER:

Milliamperage Kilovolt peak Exposure time

An increase in which factor decreases the amount of scatter reaching the image

receptor (IR)? - CORRECT ANSWER: grid ratio & beam restriction

At what level should the central ray be projected during the examination of an injured patient with a dislocated L5-S1? - CORRECT ANSWER: 1 1/2 inches inferior to the iliac crest

At which point does the spinal cord taper? - CORRECT ANSWER: Conus medullaris

Between which two lumbar vertebrae is a zygapophyseal joint that forms an average

angle of 15 degrees with the midsagittal plane? - CORRECT ANSWER: L1/L2

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Describe the general central ray orientation to the femur for an axiolateral projection of

the hip. - CORRECT ANSWER: Perpendicular to the femoral neck

During which stage of pregnancy can neurologic deficiencies occur in the fetus due to

irradiation? - CORRECT ANSWER: Late stages of organogenesis

Entrance skin dose (ESD) is considered to be 40mGyt/min for an average fluoroscopic examination. What is the approximate ESD for a patient during fluoroscopic examination

that requires 3 minutes to examine the area? - CORRECT ANSWER: 120 mGyt

For most x-ray examinations of the spine and trunk of the body, the optimal kilovolts peak (kVp) is approximately what value on the technique charts? - CORRECT

ANSWER: 80 kVp

For pair production to occur, the energy of the incoming x-ray photon must be at least

what? - CORRECT ANSWER: 1.02 MeV

For which part of the body is a contact shield the only shielding option for protection

against radiation? - CORRECT ANSWER: lens of the eye

For which radiographic examinations is gonadal shielding used? Select all that apply. -

CORRECT ANSWER: Coccyx in males

Sacrum in males

Kidneys in females

Glandular dose is considered as 15% of the total entrance skin exposure. The glandular dose of a patient is found to be 2.25 mGya. What is the actual entrance skin exposure?

- CORRECT ANSWER: 15 mGya

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