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RadSci222 > TEST 5 > Flashcards

TEST 5 Flashcards

Foot

1
Q

Joining of 3 joints into 1

A

coalition

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2
Q

How do you separate the 1st and 2nd cuneiform

A

a lateral oblique where the foot is rotated 30 degrees

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3
Q

What CR angulation is used for an axial plantodorsal projection to view the sustentaculum tali

A

40 degrees posterior

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4
Q

which term describes the normal gain of the lower limbs that we must overcome win producing an anatomically correct AP projection of the lower limb

A

anteversion

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5
Q

what line do you use when positioning an AP mortise projection

A

inner molaler line

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6
Q

Where is the CR centered for a dorsoplantar projection of the foot?

A

3rd MT joint

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7
Q

A patient comes to radiology with a possible Lis Franc injury. Define a Lis Franc injury.

A

A Lis Franc is an injury to the Lis Franc ligament between the base of the first and second metatarsal. It can range from a simple tear to a fracture of one of the metatarsals

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8
Q

What positioning routine should be performed for a possible Lis Franc injury?

A

A weight-bearing bilateral foot series would be ideal. Also, a lateral projection, weight-bearing can be performed.

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9
Q

What are the typical radiograph signs of a positive Lis Franc injury?

A

Radiographic sign for a positive Lis Franc injury is a separation between the base of the 1st and 2nd metatarsals.

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10
Q

Patient comes to radiology with a possible Jones’ fracture. Define a Jones’ fracture?

A

A Jones’ fracture is a fracture to the base/tuberosity of the 5th metatarsal.

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11
Q

What anatomy does a jones fracture involve?

A

Base or tuberosity of the 5th metatarsal.

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12
Q

Which specific projection will be demonstrate a jones fracture?

A

The medial oblique foot along with an offset or fan lateral projections of the foot will best demonstrate a Jones’ fracture.

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13
Q

Which of the following positions would best demonstrate the longitudinal arch of the foot?

A

Lateral weight-bearing

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14
Q

Situation: A patients enters ER with a severe ankle sprain. Initial radiographs do not indicate a fracture of the bony aspects of the ankle. What special projections can be taken to rule out possible ligament damage to one or more aspects of the ankle joint?

A

Inversion and eversion AP stress projections of the ankle

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15
Q

What specific projections would be performed for a 4th toe? Indicate any required angulation for these projections

A

An AP with 10-15 degree posterior angle, lateral oblique and mediolateral projections.

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16
Q

How many bones are found in the foot?

A

26

17
Q

List three aspects of the metatarsal

A

Head, shaft and base

18
Q

What specific aspect of the foot is most often fractured?

A

Tuberosity or base of 5th metatarsal

19
Q

What is the largest tarsal bone?

A

Calcaneus

20
Q

List the two arches of the foot

A

Longitudinal and transverse

21
Q

What is the joint classification and movement type for the ankle?

A

Diarthrodial; saddle

22
Q

What distinctive foramina is located in the mid-portion of the subtalar joint?

A

Sinus tarsi

23
Q

what are the three joint space of the ankle

A

talomallolar, tibiotalar, talofibular

24
Q

what is the most common error with a mortise projection

A

over-obliquity

25
Q

syndesomosis is a term for

A

high ankle fracture

26
Q

what additional projections should be done for a trimalleolar fractures

A

lower leg projection AP and lateral

27
Q

why should an AP and lateral projection of the lower leg be performed for a trimalleolar fracture of the ankle

A

because there could be a fracture of the femoral neck

28
Q

what two projections are best for assessing a jones fracture

A

Medial oblique, off set or fan lateral

29
Q

in the dorsiplantar axial projection what way are the toes flexed

A

dorsiflexed

30
Q

what bone goes to the anterior tubercle

A

tibia

31
Q

what bones is the trochlea process related to

A

calcanues

RadSci222 (5 decks)

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