Lange Q&A Radiography Examination - Procedures

Registry Review

The term valgus refers to
(A) turned outward
(B) turned inward
(C) rotated medially
(D) rotated laterally

(A) turned outward

[Valgus - turned/deformed outward.
Varus - bent or turned inward]

Demonstration of the posterior fat pad on the lateral projection of the adult elbow can be caused by
1. trauma or other pathology
2. greater than 90° flexion
3. less than 90° flexion
(A) 1 only
(B) 3 only
(C) 1 and 2 only
(D) 1 and 3 only

(D) 1 and 3 only

What is that portion of bone labeled C in the pediatric PA hand image seen in Figure 2-1?
(A) Diaphysis
(B) Epiphysis
(C) Metaphysis
(D) Apophysis

(C) Metaphysis

The proximal radius and ulna are seen free of superimposition in the following projection:
(A) scapular Y
(B) AP scapula
(C) medial oblique elbow
(D) lateral oblique elbow

(D) lateral oblique elbow

The female bony pelvis differs from the male bony pelvis in the following way(s):
1. the male greater/false pelvis is deep
2. the male acetabulum faces more laterally
3. the female coccyx is more vertical
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

Which of the following techniques would provide a posteroanterior (PA) projection of the gastroduodenal surfaces of a barium-filled high and transverse stomach?
(A) Place the patient in a 35°-40° right anterior oblique (RAO) position
(B) Place the patient in a lateral position
(C) Angle the CR 35°-45° cephalad
(D) Angle the CR 35°-45° caudad

(C) Angle the CR 35°-45° cephalad

The structures visualized when positioned as in Figure 2-2 could also be seen when performed with the patient in the following position(s):
1. lateral recumbent
2. seated
3. erect AP
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

All of the following statements regarding respiratory structures are true, except
(A) the right lung has two fissures
(B) the inferior portion of a lung is its base
(C) each lung is enclosed in pleural membrane
(D) the main stem bronchi enter the lung fissure

(D) the main stem bronchi enter the lung fissure

All of the following statements regarding an exact PA projection of the skull are true, except
(A) the OML is perpendicular to the IR
(B) the petrous pyramids fill the orbits
(C) the MSP is parallel to the IR
(D) the CR is perpendicular to the IR and exits the nasion

(C) the MSP is parallel to the IR

An accurate critique of the PA projection of the chest seen in Figure 2-3 would include the following:
1. the pulmonary apices are demonstrated
2. the air-filled trachea and carina are
demonstrated
3. ten posterior ribs are seen above the diaphragm
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

A pacemaker electrode can be introduced through a vein in the chest or upper extremity, and advanced to the
(A) left atrium
(B) right atrium
(C) left ventricle
(D) right ventricle

(D) right ventricle

Which of the following conditions is characterized by "flattening" of the hemidiaphragms?
(A) Pneumothorax
(B) Pleural effusion
(C) Emphysema
(D) Pneumonia

(C) Emphysema

Structures located in the right lower quadrant (RLQ) include the following:
1. cecum
2. vermiform appendix
3. sigmoid
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

Which of the following statements regarding Figure 2-4 is correct?
(A) The right kidney is more parallel to the IR
(B) The image was made in the LPO position
(C) The right ureter is better visualized
(D) The image was made post-void

(C) The right ureter is better visualized

During an upper GI examination of a stomach of average size and shape, a barium-filled fundus and double contrast of the pylorus and duodenal bulb are demonstrated. e position used is most likely
(A) AP erect
(B) PA
(C) RAO
(D) LPO

(D) LPO

Which of the following articulations participate(s) in formation of the ankle mortise?
1. Talotibial
2. Talocalcaneal
3. Talofibular
(A) 1 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 3 only

(B) 1 and 3 only

The upper surface of the foot may be described as the
1. plantar surface
2. anterior surface
3. dorsum
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

The outermost wall of the digestive tract is the
(A) mucosa
(B) muscularis
(C) submucosa
(D) serosa

(D) serosa

Terms used to describe movement include
1. plantar flexion
2. abduct
3. oblique
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 2 and 3

(B) 1 and 2 only

Which of the following is best demonstrated in the AP axial projection (Towne method) of the skull, with the CR directed 30° caudad to the orbitomeatal line (OML) and passing midway between the external auditory meati?
(A) Occipital bone
(B) Frontal bone
(C) Facial bones
(D) Basal foramina

(A) Occipital bone

The RPO position (Judet method) of the right acetabulum will demonstrate the
(A) anterior rim of the right acetabulum
(B) anterior iliopubic column
(C) left iliac wing
(D) posterior rim of the right acetabulum

(A) anterior rim of the right acetabulum

Which of the following conditions is demonstrated in Figure 2-5?
(A) Right upper lobe atelectasis
(B) Left upper lobe atelectasis
(C) Pneumothorax
(D) Dextrocardia

(D) Dextrocardia

Which of the following positions/projections is used to demonstrate a nearly frontal view of the sternum?
(A) AP
(B) PA
(C) RAO
(D) LAO

(C) RAO

What is the name of the condition that results in the forward slipping of one vertebra upon the vertebra below it?
(A) Spondylitis
(B) Spondylolysis
(C) Spondylolisthesis
(D) Spondylosis

(C) Spondylolisthesis

Which of the following can be used to demonstrate the intercondyloid fossa?
1. Prone, knee exed 40°, CR directed caudad 40° to the popliteal fossa
2. Supine, IR under flexed knee, CR directed cephalad to knee, perpendicular to tibia
3. Prone, patella parallel to IR, heel rotated 5°-10° lateral, CR perpendicular to knee joint
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

How should a chest examination to rule out air-fluid levels be obtained on a patient with traumatic injuries?
(A) Perform the examination in the Trendelenburg position
(B) Erect inspiration and expiration images should be obtained
(C) Include a lateral chest examination performed in dorsal decubitus position
(D) Perform the examination AP supine at 44-in SID

(C) Include a lateral chest examination performed in dorsal decubitus position

According to ACR (2017), patients with acute kidney injury or severe chronic kidney disease, or those undergoing arterial catheter study, should adhere to the following guideline(s) for iodinated contrast medium administration:
1. patients should temporarily discontinue metformin at time of (or prior to) the procedure
2. withhold metformin for 48 h after the procedure
3. metformin may be reinstituted only after renal function studies have been re-evaluated and found acceptable
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

Which of the following methods was used to obtain
the image seen in Figure 2-6?
(A) Erect PA, chin extended, OML forming 37° to IR
(B) Erect PA, OML, and CR perpendicular to IR
(C) Erect PA, chin extended, OML 15° from horizontal
(D) Erect PA, chin extended, OML 30° from horizontal

(C) Erect PA, chin extended, OML 15° from horizontal

Which of the following statements regarding the radiograph in Figure 2-6 is/are true?
1. The position is used to demonstrate the frontal and ethmoid sinuses
2. The ethmoid sinuses are seen near the medial aspect of the orbits
3. The perpendicular plate is visualized in midline of the nasal cavity
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

Which of the following serves to avoid excessive metacarpophalangeal joint overlap in the oblique projection of the hand?
(A) Oblique the hand no more than 45°
(B) Use a support sponge for the phalanges
(C) Clench the st to bring the carpals closer to the IR
(D) Use ulnar flexion

(A) Oblique the hand no more than 45°

Sternoclavicular articulations are likely to be demonstrated in all of the following, except
(A) weight-bearing
(B) RAO
(C) LAO
(D) PA

(A) weight-bearing

The relationship between the fractured ends of long bones is referred to as
(A) angulation
(B) apposition
(C) luxation
(D) sprain

(B) apposition

[apposition - alignment or misalignment]

Which of the following positions of the abdomen is obtained with the patient lying supine on the radiographic table and the CR directed horizontally to the iliac crest?
(A) AP abdomen
(B) PA abdomen
(C) Ventral decubitus position
(D) Dorsal decubitus position

(D) Dorsal decubitus position

Small amounts of air in the peritoneal cavity can be demonstrated in which of the following positions?
(A) Lateral decubitus, affected side up
(B) Lateral decubitus, affected side down
(C) AP Trendelenburg
(D) AP supine

(A) Lateral decubitus, affected side up

[Small amounts of fluid within the peritoneal or pleural space are best demonstrated in the lateral decubitus position, affected side down. Small amounts of air within the peritoneal or pleural space are best demonstrated in the lateral decubitus position, affected side up.]

Which of the following anatomic structures is seen most anteriorly in a lateral projection of the chest?
(A) Esophagus
(B) Trachea
(C) Cardiac apex
(D) Superimposed scapular borders

(C) Cardiac apex

For an AP projection of the knee on a patient whose measurement from ASIS to tabletop is 21 cm, which CR direction will best demonstrate the knee joint?
(A) 5° caudad
(B) 10° caudad
(C) 5° cephalad
(D) 0° (perpendicular)

(D) 0° (perpendicular)

In which of the following projections was the image in Figure 2-7 made?
(A) AP
(B) Medial oblique
(C) Lateral oblique
(D) Acute flexion

(B) Medial oblique

Which of the following anatomic structures is indicated by the number 3 in Figure 2-7?
(A) Medial epicondyle
(B) Trochlea
(C) Capitulum
(D) Olecranon process

(B) Trochlea

The following is/are well demonstrated in the lumbar spine seen in Figure 2-8:
1. pedicles
2. vertebral foramina
3. zygapophyseal articulations
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(A) 1 only

An intrathecal injection is associated with which of the following examinations?
(A) Intravenous urogram
(B) Retrograde pyelogram
(C) Myelogram
(D) Cystogram

(C) Myelogram

Which of the following projections can be used to supplement the traditional "open-mouth" projec- tion when the upper portion of the odontoid process cannot be well demonstrated?
(A) AP or PA through the foramen magnum
(B) AP oblique with right and le head rotation
(C) Horizontal beam lateral
(D) AP axial

(A) AP or PA through the foramen magnum

The floor of the cranium includes all of the following bones, except
(A) the temporal bones
(B) the occipital bone
(C) the ethmoid bone
(D) the sphenoid bone

(B) the occipital bone

A lateral projection of the hand in extension is often recommended to evaluate
1. a fracture
2. a foreign body
3. so tissue
(A) 1 only
(B) 2 only
(C) 2 and 3 only
(D) 1 and 3 only

(C) 2 and 3 only

In which of the following positions was Figure 2-9 made?
(A) RPO
(B) LPO
(C) AP axial
(D) Right lateral decubitus

(A) RPO

The ascending colon is labeled in Figure 2-9 as number
(A) 3
(B) 4
(C) 5
(D) 6

(A) 3

Persistent connection between the fetal aorta and pulmonary artery is referred to as
(A) an atrial septal defect
(B) a ventricular septal defect
(C) a patent ductus arteriosus
(D) coarctation of the aorta

(C) a patent ductus arteriosus

Which of the following projections/positions will best demonstrate a subacromial or subcoracoid dislocation?
(A) Tangential
(B) AP axial
(C) Transthoracic lateral
(D) PA oblique scapular Y

(D) PA oblique scapular Y

Arteries and veins enter and exit the medial aspect of each lung at the
(A) root
(B) hilus
(C) carina
(D) epiglottis

(B) hilus

Which of the following positions can be used to demonstrate the axillary ribs of the right thorax?
1. RAO
2. LAO
3. RPO
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

The interspaces between the first and second cunei- forms best demonstrated in which of the following projections?
(A) Lateral oblique foot
(B) Medial oblique foot
(C) Lateral foot
(D) Weight-bearing foot

(A) Lateral oblique foot

The sternal angle is at approximately the same level as the
(A) T2-T3 interspace fifth thoracic vertebra
(B) T9-T10 interspace
(C) T5
(D) costal margin

(C) T5

The condition in which an occluded blood vessel stops blood flow to a portion of the lungs is referred to as
(A) pneumothorax
(B) atelectasis
(C) pulmonary embolism
(D) hypoxia

(C) pulmonary embolism

To demonstrate esophageal varices, the patient must be examined in
(A) the recumbent position
(B) the erect position
(C) the anatomic position
(D) the Fowler position

(A) the recumbent position

[Esophageal varices - veins in lower part of the tube running from the throat to the stomach

Select the incorrect statement regarding Figure 2-10.
1. The degree of obliquity is too great
2. The midphalanges are foreshortened
3. The interphalangeal joints are well
demonstrated
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(A) 1 only

The tissue that occupies the central cavity of the adult long bone body/shaft is
(A) red marrow
(B) yellow marrow
(C) endosteum
(D) cancellous tissue

(B) yellow marrow

All the following structures are associated with the posterior femur, except
(A) popliteal surface
(B) intercondyloid fossa
(C) intertrochanteric line
(D) linea aspera

(C) intertrochanteric line

The following projection of the ankle best demonstrates the mortise:
(A) medial oblique 15°-20°
(B) lateral oblique 15°-20°
(C) medial oblique 45°
(D) lateral oblique 45°

(A) medial oblique 15°-20°

What condition(s) is/are demonstrated in Figure 2-11?
1. Emphysema
2. Pneumothorax
3. Pleural Effusion
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

Which of the following bony landmarks is in the same transverse plane as L2-L3?
(A) Inferior costal margin
(B) Greater trochanter
(C) Iliac crest
(D) ASIS

(A) Inferior costal margin

A radiolucent sponge can be placed under the patient's waist for a lateral projection of the lumbosacral spine to
1. make the vertebral column parallel with the IR
2. place the intervertebral disk spaces perpendicular to the IR
3. decrease the amount of SR reaching the IR
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

Which of the following may be used to evaluate the glenohumeral joint?
1. ScapularYprojection
2. Inferosuperior axial
3. Transthoracic lateral
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

Which of the following is/are distal to the tibial plateau?
1. Intercondyloid fossa
2. Tibial condyles
3. Tibial tuberosity
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

Evaluation criteria for a lateral projection of the humerus include
1. epicondyles parallel to the IR
2. lesser tubercle in profile
3. superimposed epicondyles
(A) 1 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

Which of the following are mediastinal structures?
1. Heart
2. Trachea
3. Esophagus
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

With the patient in the PA position, which of the following tube angle and direction combinations is correct for an axial projection of the clavicle?
(A) 5°-15° caudad
(B) 5°-15° cephalad
(C) 15°-30° cephalad
(D) 15°-30° caudad

(D) 15°-30° caudad

Which of the following fracture classifications describes a small, bony fragment pulled from a bony process?
(A) Avulsion fracture
(B) Torus fracture
(C) Comminuted fracture (D) Compound fracture

(A) Avulsion fracture

That portion of the humerus which articulates with the ulna to help form the elbow joint is the
(A) semilunar/trochlear notch
(B) radial head
(C) capitulum
(D) trochlea

(D) trochlea

Foot motion caused by turning the ankle outward is termed
(A) eversion
(B) inversion
(C) abduction
(D) adduction

(A) eversion

During myelography, contrast medium is introduced into the
(A) subdural space
(B) subarachnoid space
(C) epidural space
(D) epidermal space

(B) subarachnoid space

The junction of the sagittal and coronal sutures is the
(A) diploe
(B) lambda
(C) bregma
(D) pterion

(C) bregma

Which of the following statements is/are true regarding the radiograph in Figure 2-12?
1. The patient is placed in an RAO position
2. The midcoronal plane is about 60° to the IR
3. The acromion process is free of
superimposition
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

Which of the following precautions should be observed when radiographing a patient who has sustained a traumatic injury to the hip?
1. When a fracture is suspected, manipulation of the affected extremity should be performed by a physician
2. e AP axiolateral projection should be avoided
3. To evaluate the entire region, the pelvis is typically included in the initial examination
(A) 1 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 3 only

The lumbar vertebral pedicle is represented by which part of the "Scotty dog" seen in a correctly positioned oblique lumbar spine?
(A) Eye
(B) Nose
(C) Body
(D) Ear

(A) Eye

An injury to a structure located on the side opposite that of the primary injury is referred to as
(A) blowout
(B) Le Fort
(C) contracture
(D) contrecoup

(D) contrecoup

Which of the following places the anatomical points of the hand's third digit in correct order from proximal to distal?
(A) Base of metacarpal, head of middle phalanx, carpometacarpal joint, metacarpophalangeal joint, distal interphalangeal joint, proximal interphalangeal joint, ungual tuft
(B) Carpometacarpal joint, base of metacarpal, metacarpophalangeal joint, proximal interphalangeal joint, head of middle phalange, distal interphalangeal joint, ungual tuft
(C) Ungual tuft, distal interphalangeal joint, head of middle phalanx, proximal interphalangeal joint, metacarpophalangeal joint, base of metacarpal, carpometacarpal joint
(D) Carpometacarpal joint, metacarpophalangeal joint, base of metacarpal, head of middle phalanx, proximal interphalangeal joint, distal interphalangeal joint, ungual tuft

(B) Carpometacarpal joint, base of metacarpal, metacarpophalangeal joint, proximal interphalangeal joint, head of middle phalange, distal interphalangeal joint, ungual tuft

Which of the following conditions is limited specifically to the tibial tuberosity?
(A) Ewing sarcoma
(B) Osgood-Schlatter disease
(C) Gout
(D) Exostosis

(B) Osgood-Schlatter disease

AP stress studies of the ankle may be performed
1. to demonstrate fractures of the distal tibia and fibula
2. following inversion or eversion injuries
3. to demonstrate a ligament tear
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

Which of the following is/are part of the bony thorax?
1. Manubrium
2. Clavicles
3. 24 ribs
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 1, 2, and 3

(C) 1 and 3 only

Aspirated foreign bodies in older children and adults are most likely to lodge in the
(A) right main stem bronchus
(B) left main stem bronchus
(C) esophagus
(D) proximal stomach

(A) right main stem bronchus

The PA chest radiograph shown in Figure 2-13 demonstrates
1. rotation
2. scapulae removed from lung fields
3. adequate inspiration
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

The letter A in Figure 2-13 indicates
(A) a left anterior rib
(B) a right posterior rib
(C) a left posterior rib
(D) a right anterior rib

(C) a left posterior rib

With the patient seated at the end of the x-ray table, elbow resting on table and flexed 80°, and the CR directed 45° laterally from the shoulder to the elbow joint, which of the following structures will be demonstrated best?
(A) Radial head
(B) Ulnar head
(C) Coronoid process
(D) Olecranon process

(C) Coronoid process

Types of articulations lacking a joint cavity include
1. fibrous
2. cartilaginous
3. synovial
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(B) 1 and 2 only

The CR is parallel to the intervertebral foramina in the following projection(s):
1. lateral cervical spine
2. lateral thoracic spine
3. lateral lumbar spine
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

The structure located midway between the anterosuperior iliac spine (ASIS) and pubic symphysis is the
(A) dome of the acetabulum
(B) femoral neck
(C) greater trochanter
(D) iliac crest

(A) dome of the acetabulum

The structure labeled 4 in Figure 2-14 is the
(A) maxillary sinus
(B) sphenoidal sinus
(C) ethmoidal sinus
(D) frontal sinus

(A) maxillary sinus

Which of the following would best evaluate the structure labeled 3 in Figure 2-14?
(A) PA axial projection (Caldwell method)
(B) Parietoacanthial projection (Waters' method)
(C) Lateral projection
(D) Submentovertex projection

(D) Submentovertex projection

Hysterosalpingography may be performed for demonstration of
1. uterine tubal patency
2. mass lesions in the uterine cavity
3. uterine position
(A) 1 and 2 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 1, 2, and 3

(D) 1, 2, and 3

The radiograph shown in Figure 2-15 demonstrates the articulation between the
1. talus and the calcaneus
2. calcaneus and the cuboid
3. talus and the navicular
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only

The base of the fifth metacarpal seen in Fig 2-16 is indicated by number
(A) 7
(B) 8
(C) 11
(D) 12

(A) 7

The articular facets of L5-S1 are best demonstrated in a/an
(A) AP projection
(B) 30° oblique
(C) 45° oblique
(D) AP axial projection

(B) 30° oblique

The patient's chin should be elevated during chest radiography to
(A) permit the diaphragm to move to its lowest position
(B) avoid superimposition on the apices
(C) assist in maintaining an upright position
(D) keep the MSP parallel

(B) avoid superimposition on the apices

That portion of a long bone from which it lengthens/grows is the
(A) diaphysis
(B) epiphysis
(C) metaphysis
(D) apophysis

(D) apophysis

Medial displacement of a tibial fracture would be best demonstrated in the
(A) AP projection
(B) lateral projection
(C) medial oblique projection
(D) lateral oblique projection

(A) AP projection

What part of the "Scotty dog," seen in a correctly positioned oblique lumbar spine, represents the lumbar transverse process?
(A) Eye
(B) Nose
(C) Body
(D) Neck

(B) Nose

All the following statements regarding the position shown in Figure 2-17 are true, except
(A) a left pleural effusion could be demonstrated
(B) a right pneumothorax could be demonstrated
(C) a left lateral decubitus position is illustrated
(D) the CR is directed vertically to the level of T7

(D) the CR is directed vertically to the level of T7

Which of the following positions best demonstrates the proximal tibiofibular articulation?
(A) AP
(B) 90° mediolateral
(C) 45° internal rotation
(D) 45° external rotation

(C) 45° internal rotation

At what level do the carotid arteries bifurcate?
(A) Foramen magnum
(B) Trachea
(C) Pharynx
(D) C4

(D) C4

During a double-contrast BE, which of the following positions would afford the best double-contrast visualization of the lateral wall of the descending colon and the medial wall of the ascending colon?
(A) AP or PA erect
(B) Right lateral decubitus
(C) Le lateral decubitus
(D) Ventral decubitus

(B) Right lateral decubitus

Which of the following statements is/are true regarding the shoulder image seen in Figure 2-18?
1. The unaffected arm is adjacent to the IR
2. It provides a lateral view
3. It is useful in trauma situations
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3

(C) 2 and 3 only