Which of the following members of the Radiology Department is responsible for ascertaining all radiation guidelines and employing radiation safety measures? - ANSWER Radiation officer
AnswerWhich of the following devices is used to control the reproducibility of images regardless of tissue densi...
NHRA EXAM 1 QUESTIONS AND
ANSWERS GRADED A+
Which of the following members of the Radiology Department is responsible for
ascertaining all radiation guidelines and employing radiation safety measures? -
ANSWER Radiation officer
AnswerWhich of the following devices is used to control the reproducibility of images
regardless of tissue density variations? - ANSWER phototimer
AnswerWhich of the following is the proper preparation for patient having lower
abdomen CT scan? - ANSWER Laxative 1 day before and NPO from midnight
AnswerWhich of the following processes is responsible for creation of the radiographic
image? - ANSWER Differential absorption
AnswerA 19-year-old patient is referred to the Emergency Department to exclude
fracture in the occipital bone following a car accident. Which of the following is the best
projection to demonstrate this fracture? - ANSWER towne's view
AnswerWhich of the following is the most likely cause for preference of erect position in
intravenous urography examination? - ANSWER Rule out nephroptosis
AnswerA patient is evaluated for brain tumour by a series of magnetic resonance
images. Contrast media is injected to demonstrate the extent of the lesion. Which of the
following pulse sequence will best demonstrate it? - ANSWER T1 weighted
AnswerAs a result of a medical error, a dose of 0.25 Gy is delivered to the fetus during
the early part of the first trimester of the pregnancy. Which of the following is the most
likely clinical adverse outcome? - ANSWER 1-2 weeks abortion
3-6 weeks skeletal anomalies
7-10 weeks (non specific) neurologic anomalies
AnswerWhich of the following is the subsequent biologic effect resulting from acute
whole body exposure to 0.25 sievert? - ANSWER decreased lymphocytes
AnswerWhich of the following projection gives the highest thyroid dose? - ANSWER
SMV skull
AnswerWhich of the following is the primary reason to repeat radiographs? - ANSWER
poor communication between radiographer and patient
, AnswerA 35-year- old woman with complaints of lower back pain is referred to the
Radiology Department. The physician suspects L5-S1 Spondylolisthesis. Which of the
following best diagnose this case? - ANSWER MR myelography
AnswerA body is placed 4 feet from a radiation source and received an exposure rate of
20 R/h. Which of the following is the distance required for the exposure rate of 5 R/h? -
ANSWER using inverse square law " I1/I2 = (D2)2/(D1)2
20/5=x2/16=64=√(64=8ft'
AnswerA 55-year-old man patient is referred to Radiology Department for IVU
examination. He has brought lab reports (see lab results). Test Results Normal Values
Blood urea nitrogen 8.92 2.8-8.9 mmol/L Creatinine 177 44-115 μmol/L Which of the
following is the appropriate step to take? - ANSWER both urea and creatinine are high;
Consult the referring doctor
AnswerThe urinary bladder received an absorbed dose of 0.15 Gy, the radiation
weighing factor for the X-ray is 1 and the tissue weighing factor for the urinary bladder is
0.05. Which of the following is the effective dose in sievert? - ANSWER Effective dose=
D*WR*WT
=0.15*1*0.05
=0.0075~0.001 Sv
AnswerWhich of the following is the routine patient position in CT/ MRI/US procedure? -
ANSWER Supine
AnswerA child presents with difficulty in breathing and is diagnosed as enlarged
adenoid. Which of the following radiographic projection is of high diagnostic
importance? - ANSWER Lateral nasopharynx
AnswerIn which of the following periods during pregnancy does radiation exposure
confer the greatest risk to the fetus? - ANSWER 1-10 weeks first trimester, first 3
months
AnswerWhich of the following most likely contributes to occupational exposure? -
ANSWER Compton scatter
AnswerFew samples are taken in CT partial scanning technique that lead to aliasing
artefacts. Which of the following actions must be done? - ANSWER Increase scan time
and reduce pitch
AnswerFew samples are taken in US scanning technique that lead to aliasing artefacts.
Which of the following actions must be done? - ANSWER increase the frequency of the
transducer
AnswerFew samples are taken in MRI scanning technique that lead to aliasing
artefacts. Which of the following actions must be done? - ANSWER increase FOV
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