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HESI RADIOGRAPHY TEST ACTUAL TEST LATEST
2026 COMPLETE VERIFIED QUESTIONS AND WELL
ELABORATED ANSWERS (A NEW UPDATED
VERSION) |ALREADY GRADED A+
1. A radiographer obtains a digital radiograph using the correct exposure factors,
but the resulting image demonstrates excessive quantum noise. The exposure
indicator suggests that the receptor received substantially less radiation than
required for the examination. Which factor is the MOST likely explanation?
A. Excessive SID
B. Insufficient photon quantity reaching the image receptor
C. Excessive pixel bit depth
D. Increased focal-spot size
Answer: B — Insufficient photon quantity reaching the image receptor
Explanation: Quantum noise, or quantum mottle, occurs when too few x-ray
photons reach the image receptor to adequately represent the anatomy. Increasing
the appropriate exposure, particularly mAs, increases the number of photons and
reduces quantum noise. Excessive SID can also reduce receptor exposure, but the
fundamental problem is insufficient photon quantity.
2. A radiographer is performing a PA chest examination on an ambulatory adult
patient. The patient is instructed to take a deep inspiration and hold the breath.
Which finding BEST indicates that the radiograph was obtained on adequate
inspiration?
A. At least eight posterior ribs are demonstrated above the diaphragm
B. The clavicles are completely superimposed over the apices
C. The scapulae completely cover the lateral lung fields
D. The diaphragm is positioned at the level of the fourth posterior rib
Answer: A — At least eight posterior ribs are demonstrated above the
diaphragm
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Explanation: An adequately inspired PA chest radiograph generally demonstrates
approximately 9–10 posterior ribs above the diaphragm, although criteria can vary
slightly. Adequate inspiration allows better evaluation of the lungs and helps
prevent the appearance of falsely increased pulmonary density.
3. A patient with suspected cervical spine trauma arrives immobilized on a
backboard. The patient reports severe neck pain and numbness in the upper
extremities. Which action should the radiographer take FIRST?
A. Remove the cervical collar to improve visualization
B. Ask the patient to rotate the head toward the affected side
C. Maintain spinal immobilization and follow the trauma imaging protocol
D. Place the patient in a routine upright cervical spine position
Answer: C — Maintain spinal immobilization and follow the trauma imaging
protocol
Explanation: A patient with suspected cervical spine injury must be treated as
potentially unstable until cleared by the appropriate medical team. The
radiographer should not independently remove immobilization or manipulate the
patient's neck. Trauma imaging should be performed using projections and
positioning techniques appropriate for the patient's condition.
4. During an AP pelvis examination, the radiographer notices that the patient's
lower extremities have not been internally rotated. Which anatomical finding is
MOST likely to occur?
A. The femoral necks will appear shortened
B. The greater trochanters will be projected completely free of the femoral necks
C. The lesser trochanters will become completely invisible
D. The acetabula will automatically become open
Answer: A — The femoral necks will appear shortened
Explanation: For a routine AP pelvis, the lower limbs are generally internally
rotated approximately 15°–20° when clinically appropriate. This places the femoral
necks more parallel to the image receptor and reduces apparent foreshortening. The
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maneuver should not be performed when a proximal femoral or pelvic fracture is
suspected unless specifically authorized.
5. A radiographer evaluates an AP ankle image and notices that the lateral ankle
mortise is open, but the medial mortise is narrowed and the distal tibiofibular joint
is not adequately demonstrated. Which positioning correction is MOST
appropriate?
A. Increase plantar flexion
B. Adjust the amount of internal rotation to obtain the proper mortise position
C. Rotate the foot completely medially until the toes point toward the table
D. Increase the central-ray angle by 30°
Answer: B — Adjust the amount of internal rotation
Explanation: A properly obtained AP mortise projection generally requires
approximately 15°–20° of internal rotation of the leg and foot so that the
intermalleolar line is approximately parallel with the image receptor. The goal is to
open the ankle mortise without excessive rotation.
6. A patient requires an AP axial projection of the toes. The radiographer wants to
reduce foreshortening of the phalanges while maintaining appropriate joint-space
visualization. Which central-ray direction is generally appropriate?
A. Perpendicular to the image receptor with no angulation
B. Approximately 10°–15° toward the heel
C. 45° cephalad
D. 30° laterally
Answer: B — Approximately 10°–15° toward the heel
Explanation: An AP axial projection of the toes uses a small caudad angle,
typically around 10°–15°, depending on the specific protocol and anatomy. The
angulation helps compensate for the natural curvature of the toes and improves
visualization of the interphalangeal joint spaces.
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7. A radiographer is evaluating a lateral wrist radiograph. The distal radius and
ulna are nearly superimposed, but the metacarpal bases demonstrate considerable
rotation. Which positioning error is MOST likely responsible?
A. Excessive wrist flexion
B. Failure to place the wrist in a true lateral position
C. Excessive SID
D. Incorrect exposure time
Answer: B — Failure to place the wrist in a true lateral position
Explanation: A true lateral wrist requires careful alignment of the wrist and hand.
The distal radius and ulna should be nearly superimposed, while the metacarpal
relationships should be appropriate for a lateral projection. Rotation can make
evaluation of fractures and joint alignment difficult.
8. A radiographer selects the wrong examination from the digital radiography
system's examination menu before exposing the patient. The resulting image has
inappropriate processing and abnormal brightness or contrast despite technically
adequate exposure. What is the MOST likely cause?
A. Histogram analysis error
B. Excessive OID
C. Anode heel effect
D. Increased focal-spot blooming
Answer: A — Histogram analysis error
Explanation: Digital systems analyze the exposure field using processing
algorithms. Selecting an incorrect examination or processing algorithm can cause
the system to misinterpret the image data, producing inappropriate brightness,
contrast, or exposure-index information. Correct examination selection is therefore
essential.
9. A radiographer needs to improve spatial resolution during an examination
without changing the anatomy being imaged. Which modification would MOST
directly improve spatial resolution?
HESI RADIOGRAPHY TEST ACTUAL TEST LATEST
2026 COMPLETE VERIFIED QUESTIONS AND WELL
ELABORATED ANSWERS (A NEW UPDATED
VERSION) |ALREADY GRADED A+
1. A radiographer obtains a digital radiograph using the correct exposure factors,
but the resulting image demonstrates excessive quantum noise. The exposure
indicator suggests that the receptor received substantially less radiation than
required for the examination. Which factor is the MOST likely explanation?
A. Excessive SID
B. Insufficient photon quantity reaching the image receptor
C. Excessive pixel bit depth
D. Increased focal-spot size
Answer: B — Insufficient photon quantity reaching the image receptor
Explanation: Quantum noise, or quantum mottle, occurs when too few x-ray
photons reach the image receptor to adequately represent the anatomy. Increasing
the appropriate exposure, particularly mAs, increases the number of photons and
reduces quantum noise. Excessive SID can also reduce receptor exposure, but the
fundamental problem is insufficient photon quantity.
2. A radiographer is performing a PA chest examination on an ambulatory adult
patient. The patient is instructed to take a deep inspiration and hold the breath.
Which finding BEST indicates that the radiograph was obtained on adequate
inspiration?
A. At least eight posterior ribs are demonstrated above the diaphragm
B. The clavicles are completely superimposed over the apices
C. The scapulae completely cover the lateral lung fields
D. The diaphragm is positioned at the level of the fourth posterior rib
Answer: A — At least eight posterior ribs are demonstrated above the
diaphragm
,2|Page
Explanation: An adequately inspired PA chest radiograph generally demonstrates
approximately 9–10 posterior ribs above the diaphragm, although criteria can vary
slightly. Adequate inspiration allows better evaluation of the lungs and helps
prevent the appearance of falsely increased pulmonary density.
3. A patient with suspected cervical spine trauma arrives immobilized on a
backboard. The patient reports severe neck pain and numbness in the upper
extremities. Which action should the radiographer take FIRST?
A. Remove the cervical collar to improve visualization
B. Ask the patient to rotate the head toward the affected side
C. Maintain spinal immobilization and follow the trauma imaging protocol
D. Place the patient in a routine upright cervical spine position
Answer: C — Maintain spinal immobilization and follow the trauma imaging
protocol
Explanation: A patient with suspected cervical spine injury must be treated as
potentially unstable until cleared by the appropriate medical team. The
radiographer should not independently remove immobilization or manipulate the
patient's neck. Trauma imaging should be performed using projections and
positioning techniques appropriate for the patient's condition.
4. During an AP pelvis examination, the radiographer notices that the patient's
lower extremities have not been internally rotated. Which anatomical finding is
MOST likely to occur?
A. The femoral necks will appear shortened
B. The greater trochanters will be projected completely free of the femoral necks
C. The lesser trochanters will become completely invisible
D. The acetabula will automatically become open
Answer: A — The femoral necks will appear shortened
Explanation: For a routine AP pelvis, the lower limbs are generally internally
rotated approximately 15°–20° when clinically appropriate. This places the femoral
necks more parallel to the image receptor and reduces apparent foreshortening. The
,3|Page
maneuver should not be performed when a proximal femoral or pelvic fracture is
suspected unless specifically authorized.
5. A radiographer evaluates an AP ankle image and notices that the lateral ankle
mortise is open, but the medial mortise is narrowed and the distal tibiofibular joint
is not adequately demonstrated. Which positioning correction is MOST
appropriate?
A. Increase plantar flexion
B. Adjust the amount of internal rotation to obtain the proper mortise position
C. Rotate the foot completely medially until the toes point toward the table
D. Increase the central-ray angle by 30°
Answer: B — Adjust the amount of internal rotation
Explanation: A properly obtained AP mortise projection generally requires
approximately 15°–20° of internal rotation of the leg and foot so that the
intermalleolar line is approximately parallel with the image receptor. The goal is to
open the ankle mortise without excessive rotation.
6. A patient requires an AP axial projection of the toes. The radiographer wants to
reduce foreshortening of the phalanges while maintaining appropriate joint-space
visualization. Which central-ray direction is generally appropriate?
A. Perpendicular to the image receptor with no angulation
B. Approximately 10°–15° toward the heel
C. 45° cephalad
D. 30° laterally
Answer: B — Approximately 10°–15° toward the heel
Explanation: An AP axial projection of the toes uses a small caudad angle,
typically around 10°–15°, depending on the specific protocol and anatomy. The
angulation helps compensate for the natural curvature of the toes and improves
visualization of the interphalangeal joint spaces.
, 4|Page
7. A radiographer is evaluating a lateral wrist radiograph. The distal radius and
ulna are nearly superimposed, but the metacarpal bases demonstrate considerable
rotation. Which positioning error is MOST likely responsible?
A. Excessive wrist flexion
B. Failure to place the wrist in a true lateral position
C. Excessive SID
D. Incorrect exposure time
Answer: B — Failure to place the wrist in a true lateral position
Explanation: A true lateral wrist requires careful alignment of the wrist and hand.
The distal radius and ulna should be nearly superimposed, while the metacarpal
relationships should be appropriate for a lateral projection. Rotation can make
evaluation of fractures and joint alignment difficult.
8. A radiographer selects the wrong examination from the digital radiography
system's examination menu before exposing the patient. The resulting image has
inappropriate processing and abnormal brightness or contrast despite technically
adequate exposure. What is the MOST likely cause?
A. Histogram analysis error
B. Excessive OID
C. Anode heel effect
D. Increased focal-spot blooming
Answer: A — Histogram analysis error
Explanation: Digital systems analyze the exposure field using processing
algorithms. Selecting an incorrect examination or processing algorithm can cause
the system to misinterpret the image data, producing inappropriate brightness,
contrast, or exposure-index information. Correct examination selection is therefore
essential.
9. A radiographer needs to improve spatial resolution during an examination
without changing the anatomy being imaged. Which modification would MOST
directly improve spatial resolution?
