LMRT ARRT Exam Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which projection is best for visualizing the lateral aspect of the wrist?
✔✔Lateral wrist projection
What is the recommended SID for chest radiography?
✔✔72 inches
Which type of radiation is most responsible for patient dose in diagnostic imaging?
✔✔Scatter radiation
What is the function of the collimator in an X-ray system?
✔✔To restrict the X-ray beam to the area of interest
Why should a patient remove jewelry before an X-ray exam?
✔✔To prevent artifacts on the radiograph
1
,What is the recommended action if a patient is unable to remain still during imaging?
✔✔Use immobilization devices or request assistance
Which position is typically used for a lateral projection of the cervical spine?
✔✔Patient in true lateral with shoulders relaxed
Why is proper alignment of the CR with the IR important?
✔✔To minimize distortion and ensure accurate representation of anatomy
What is the main purpose of a grid in radiography?
✔✔To absorb scatter radiation and improve image contrast
Which part of the X-ray tube emits electrons when heated?
✔✔Filament
What does increasing the mAs do to the radiographic image?
✔✔Increases the density (darkness) of the image
2
, Which factor primarily controls the penetration of X-rays through tissue?
✔✔kVp
Why is it important to use the smallest possible radiation field?
✔✔To minimize patient exposure and reduce scatter
Which anatomical structure is best demonstrated with a PA chest projection?
✔✔Lungs and mediastinum
What is the purpose of using a compensating filter?
✔✔To equalize exposure across areas of varying tissue thickness
Which projection best demonstrates the intervertebral foramina of the cervical spine?
✔✔Oblique cervical spine projection
Why should a lead thyroid shield be used during head or neck radiography?
✔✔To protect the thyroid gland from unnecessary radiation
3
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which projection is best for visualizing the lateral aspect of the wrist?
✔✔Lateral wrist projection
What is the recommended SID for chest radiography?
✔✔72 inches
Which type of radiation is most responsible for patient dose in diagnostic imaging?
✔✔Scatter radiation
What is the function of the collimator in an X-ray system?
✔✔To restrict the X-ray beam to the area of interest
Why should a patient remove jewelry before an X-ray exam?
✔✔To prevent artifacts on the radiograph
1
,What is the recommended action if a patient is unable to remain still during imaging?
✔✔Use immobilization devices or request assistance
Which position is typically used for a lateral projection of the cervical spine?
✔✔Patient in true lateral with shoulders relaxed
Why is proper alignment of the CR with the IR important?
✔✔To minimize distortion and ensure accurate representation of anatomy
What is the main purpose of a grid in radiography?
✔✔To absorb scatter radiation and improve image contrast
Which part of the X-ray tube emits electrons when heated?
✔✔Filament
What does increasing the mAs do to the radiographic image?
✔✔Increases the density (darkness) of the image
2
, Which factor primarily controls the penetration of X-rays through tissue?
✔✔kVp
Why is it important to use the smallest possible radiation field?
✔✔To minimize patient exposure and reduce scatter
Which anatomical structure is best demonstrated with a PA chest projection?
✔✔Lungs and mediastinum
What is the purpose of using a compensating filter?
✔✔To equalize exposure across areas of varying tissue thickness
Which projection best demonstrates the intervertebral foramina of the cervical spine?
✔✔Oblique cervical spine projection
Why should a lead thyroid shield be used during head or neck radiography?
✔✔To protect the thyroid gland from unnecessary radiation
3
