NR 603 CEA – Chest & Abdomen X-Ray
Practice Questions with Answers & Rationales
SECTION 1: CHEST X-RAY – FUNDAMENTALS & QUALITY (Questions 1–
10)
1. A 55-year-old patient presents with dyspnea and chest pain. You order
a chest X-ray. Which of the following is the standard view for routine
chest radiography and provides the most accurate assessment of cardiac
size?
A) Anteroposterior (AP) view
B) Posteroanterior (PA) view
C) Lateral decubitus view
D) Lordotic view
Answer: B) Posteroanterior (PA) view
Rationale: The PA view is the standard for routine chest radiography. It
minimizes cardiac magnification because the heart is closer to the film,
providing the most accurate assessment of cardiac size. AP views, often
obtained portably, magnify the heart and are less reliable for size assessment.
The lateral decubitus view is used to detect small pleural effusions.
2. When evaluating the quality of a chest X-ray, which finding indicates
that the patient was properly positioned without rotation?
A) The spinous processes are visible
B) The medial ends of the clavicles are equidistant from the spinous processes
C) The gastric bubble is visible below the left hemidiaphragm
D) The scapulae are projected outside the lung fields
Answer: B) The medial ends of the clavicles are equidistant from the
spinous processes
Rationale: Proper positioning without rotation is confirmed when the medial
ends of the clavicles are equidistant from the spinous processes. Rotation can
,distort the appearance of the mediastinum and heart, leading to
misinterpretation.
3. A chest X-ray is obtained on a patient who is unable to take a deep
breath. The image shows the hemidiaphragms at the level of the 8th
posterior ribs. What is the most likely consequence of this inadequate
inspiration?
A) The heart will appear smaller than normal
B) The lung fields will appear hyperlucent
C) The heart will appear enlarged and the pulmonary vasculature will appear
crowded
D) The trachea will appear deviated
Answer: C) The heart will appear enlarged and the pulmonary
vasculature will appear crowded
Rationale: With an expiratory or inadequate inspiratory view, the
hemidiaphragms are higher, making the heart appear larger and crowding the
basilar pulmonary vessels. Adequate inspiration (diaphragms at the level of
the 9th–10th posterior ribs) is necessary for accurate interpretation.
4. A patient has a chest X-ray performed in the AP projection. Which of
the following is true regarding the AP view compared to the PA view?
A) The AP view provides better visualization of the lung apices
B) The AP view magnifies the cardiac silhouette
C) The AP view is the preferred view for evaluating cardiac size
D) The AP view eliminates the scapulae from the lung fields
Answer: B) The AP view magnifies the cardiac silhouette
Rationale: The AP view, often obtained with portable equipment, places the
X-ray source closer to the patient and the film farther from the heart, resulting
in magnification of the cardiac silhouette. This can falsely suggest
cardiomegaly. The PA view is preferred for accurate cardiac size assessment.
,5. A 45-year-old presents with a suspected left lower lobe pneumonia. In
addition to the PA view, which additional view would be most helpful in
confirming the diagnosis?
A) Right lateral decubitus
B) Left lateral decubitus
C) Lateral view
D) Apical lordotic view
Answer: C) Lateral view
Rationale: A lateral view is essential for localizing abnormalities to specific
lung lobes. Left lower lobe pneumonia may be obscured by the heart on the
PA view but is typically visible as a retrocardiac opacity on the lateral view.
Lateral views help differentiate between lobar and segmental involvement.
6. Which of the following structures is NOT normally visible on a
standard PA chest X-ray?
A) Aortic knob
B) Right atrium
C) Left ventricular apex
D) Coronary arteries
Answer: D) Coronary arteries
Rationale: Coronary arteries are not visible on a standard chest X-ray unless
they are calcified. The aortic knob, right atrium (forming the right heart
border), and left ventricular apex are normally visible cardiac silhouette
structures.
7. On a normal chest X-ray, which of the following best describes the
normal position of the trachea?
A) Deviated to the right
B) Midline, slightly to the right at the level of the aortic arch
C) Midline, slightly to the left at the level of the aortic arch
D) Deviated to the left
, Answer: B) Midline, slightly to the right at the level of the aortic arch
Rationale: The trachea is normally midline but may be slightly deviated to the
right at the level of the aortic arch due to the left-sided aortic arch. Significant
tracheal deviation suggests a mass, tension pneumothorax, or other
mediastinal pathology.
8. A chest X-ray is obtained on a patient with suspected pneumothorax.
The patient is unable to sit upright. Which view is most appropriate?
A) PA view
B) AP view
C) Lateral decubitus view with the affected side up
D) Lateral view
Answer: C) Lateral decubitus view with the affected side up
Rationale: In a patient unable to sit upright, a lateral decubitus view with the
suspected side up (e.g., left side up for left pneumothorax) is the most
sensitive for detecting a small pneumothorax. Air rises to the highest point,
making it visible along the lateral chest wall.
9. When assessing a chest X-ray for adequate penetration, which
structure should be visible through the heart shadow?
A) The aortic arch
B) The thoracic spine
C) The pulmonary artery
D) The left main bronchus
Answer: B) The thoracic spine
Rationale: Adequate penetration is assessed by visualizing the thoracic spine
through the heart shadow. If the spine is too visible, the film is over-
penetrated; if not visible at all, it is under-penetrated. Proper penetration is
essential for evaluating subtle lung and mediastinal abnormalities.
Practice Questions with Answers & Rationales
SECTION 1: CHEST X-RAY – FUNDAMENTALS & QUALITY (Questions 1–
10)
1. A 55-year-old patient presents with dyspnea and chest pain. You order
a chest X-ray. Which of the following is the standard view for routine
chest radiography and provides the most accurate assessment of cardiac
size?
A) Anteroposterior (AP) view
B) Posteroanterior (PA) view
C) Lateral decubitus view
D) Lordotic view
Answer: B) Posteroanterior (PA) view
Rationale: The PA view is the standard for routine chest radiography. It
minimizes cardiac magnification because the heart is closer to the film,
providing the most accurate assessment of cardiac size. AP views, often
obtained portably, magnify the heart and are less reliable for size assessment.
The lateral decubitus view is used to detect small pleural effusions.
2. When evaluating the quality of a chest X-ray, which finding indicates
that the patient was properly positioned without rotation?
A) The spinous processes are visible
B) The medial ends of the clavicles are equidistant from the spinous processes
C) The gastric bubble is visible below the left hemidiaphragm
D) The scapulae are projected outside the lung fields
Answer: B) The medial ends of the clavicles are equidistant from the
spinous processes
Rationale: Proper positioning without rotation is confirmed when the medial
ends of the clavicles are equidistant from the spinous processes. Rotation can
,distort the appearance of the mediastinum and heart, leading to
misinterpretation.
3. A chest X-ray is obtained on a patient who is unable to take a deep
breath. The image shows the hemidiaphragms at the level of the 8th
posterior ribs. What is the most likely consequence of this inadequate
inspiration?
A) The heart will appear smaller than normal
B) The lung fields will appear hyperlucent
C) The heart will appear enlarged and the pulmonary vasculature will appear
crowded
D) The trachea will appear deviated
Answer: C) The heart will appear enlarged and the pulmonary
vasculature will appear crowded
Rationale: With an expiratory or inadequate inspiratory view, the
hemidiaphragms are higher, making the heart appear larger and crowding the
basilar pulmonary vessels. Adequate inspiration (diaphragms at the level of
the 9th–10th posterior ribs) is necessary for accurate interpretation.
4. A patient has a chest X-ray performed in the AP projection. Which of
the following is true regarding the AP view compared to the PA view?
A) The AP view provides better visualization of the lung apices
B) The AP view magnifies the cardiac silhouette
C) The AP view is the preferred view for evaluating cardiac size
D) The AP view eliminates the scapulae from the lung fields
Answer: B) The AP view magnifies the cardiac silhouette
Rationale: The AP view, often obtained with portable equipment, places the
X-ray source closer to the patient and the film farther from the heart, resulting
in magnification of the cardiac silhouette. This can falsely suggest
cardiomegaly. The PA view is preferred for accurate cardiac size assessment.
,5. A 45-year-old presents with a suspected left lower lobe pneumonia. In
addition to the PA view, which additional view would be most helpful in
confirming the diagnosis?
A) Right lateral decubitus
B) Left lateral decubitus
C) Lateral view
D) Apical lordotic view
Answer: C) Lateral view
Rationale: A lateral view is essential for localizing abnormalities to specific
lung lobes. Left lower lobe pneumonia may be obscured by the heart on the
PA view but is typically visible as a retrocardiac opacity on the lateral view.
Lateral views help differentiate between lobar and segmental involvement.
6. Which of the following structures is NOT normally visible on a
standard PA chest X-ray?
A) Aortic knob
B) Right atrium
C) Left ventricular apex
D) Coronary arteries
Answer: D) Coronary arteries
Rationale: Coronary arteries are not visible on a standard chest X-ray unless
they are calcified. The aortic knob, right atrium (forming the right heart
border), and left ventricular apex are normally visible cardiac silhouette
structures.
7. On a normal chest X-ray, which of the following best describes the
normal position of the trachea?
A) Deviated to the right
B) Midline, slightly to the right at the level of the aortic arch
C) Midline, slightly to the left at the level of the aortic arch
D) Deviated to the left
, Answer: B) Midline, slightly to the right at the level of the aortic arch
Rationale: The trachea is normally midline but may be slightly deviated to the
right at the level of the aortic arch due to the left-sided aortic arch. Significant
tracheal deviation suggests a mass, tension pneumothorax, or other
mediastinal pathology.
8. A chest X-ray is obtained on a patient with suspected pneumothorax.
The patient is unable to sit upright. Which view is most appropriate?
A) PA view
B) AP view
C) Lateral decubitus view with the affected side up
D) Lateral view
Answer: C) Lateral decubitus view with the affected side up
Rationale: In a patient unable to sit upright, a lateral decubitus view with the
suspected side up (e.g., left side up for left pneumothorax) is the most
sensitive for detecting a small pneumothorax. Air rises to the highest point,
making it visible along the lateral chest wall.
9. When assessing a chest X-ray for adequate penetration, which
structure should be visible through the heart shadow?
A) The aortic arch
B) The thoracic spine
C) The pulmonary artery
D) The left main bronchus
Answer: B) The thoracic spine
Rationale: Adequate penetration is assessed by visualizing the thoracic spine
through the heart shadow. If the spine is too visible, the film is over-
penetrated; if not visible at all, it is under-penetrated. Proper penetration is
essential for evaluating subtle lung and mediastinal abnormalities.
