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Diagnostic Imaging 1 > Exam 1 Roentgenometrics > Flashcards

Exam 1 Roentgenometrics Flashcards

1
Q

Martins Basilar Angle

A

Detects Platybasia
Should be 137-152 degrees
Nasion to the center of the sella turcica to the basion

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2
Q

Chamberlain’s Line

A

Hard palate to the opisthion
Odontoid should not extend more than 7mm above this line.
Detects basilar invagination (acquired) or basilar impression (congenital)

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3
Q

McGregor’s Line

A

Hard palate to the inferior occiput

Odontoid should not extend above this line 8-10mm

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4
Q

George’s Line

A

Line along the posterior vertebral bodies

Used to detect antero/retrolisthesis/spondylolisthesis

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5
Q

ADI Measurement

A

3mm in adults

5mm in children

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6
Q

Atlanto-axial “overhang” sign

A

Lateral masses of C1 appearing more lateral than the superior articular processes of C2.
This indicates a C1 fracture (Jefferson’s fracture)

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7
Q

Cervical lordosis angles

A

> 45 = hyper

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8
Q

Cervical Lordosis Depth Method

A

Tip of odontoid to posterior surface of C7
Measure the depth at C4
Average = 8-12mm

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9
Q

Harrison Posterior Tangent Method

A

Line drawn on the posterior surfaces of C2 and C7 and this angle is measured
Average is 34

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10
Q

Ruth Jackson Stress Lines

A

Line extending and intersecting from the posterior aspects of C2 and C7

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11
Q

Cervical Gravitational Line

A

From odontoid tip down vertically
Should traverse the anterior-superior aspect of C7
Indicates anterior head carriage

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12
Q

Sagittal Canal Measurement

A

Normal >16mm

Stenosis

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13
Q

Retropharyngeal Space

A
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14
Q

Retrotracheal Space

A
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15
Q

Spondylolisthesis grades

A

Grade 1 100%

Detected by George’s Line

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16
Q

Ulmann’s Line

A

If L5 crosses the perpendicular line created by the top of sacrum then spondylo

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17
Q

Tear drop distance

A

9-11mm or greater than 2mm from side to side

18
Q

Kline’s Line

A

Drawn along the outer border of the femoral neck

Indicates a slipped femoral capital epiphysis

19
Q

Shenton Line

A

Curved line from inferior pubic ramus to the medial femoral neck
Should be a normal smooth arc
Abnormal in hip dislocation, femur fx and SCFE

20
Q

Kohler’s Line

A

From medial pelvic brim to the external margin of the obturator foramen
Acetabulum should not extend beyond this line
Indicates acetabular protrusion (otto’s pelvis)

21
Q

Boehler’s Angle

A

28-40 degrees is normal

22
Q

Acromiohumeral space

A

Average is about 10mm

Any less indicates supraspinatus tendinopathy

23
Q

Epiphysis

A

Gives length to bone

24
Q

Apophysis

A

Attachment site for ligaments and tendons

25
Q

Chiari Malformation

A

Herniation of the cerebellar tonsils

Associated with wrong way scoliosis and syrinx

26
Q

Os Terminale

A

Failure of union of the secondary centre of ossification at the tip of the dens. Not associated with instability

27
Q

Os Odontodium

A 
Highly unstable (don't adjust)
Lack of fusion of the odontoid to the body of C2.
Most are a result of old odontoid fracutes
28
Q

Surgical fusion

A

arthrodesis

29
Q

Pathological fusion

A

Ankylosis

30
Q

Developmental fusion

A

Synostosis

31
Q

Klippel Feil Syndrome

A

Segmentation of multiple levels

32
Q

Sprengels Deformity

A

Congenital elevation of the Scapula

Seen in 20-25% of Klippel Feil

33
Q

Putti’s triad

A
  1. Absent or small proximal femoral epiphysis
  2. Lateral displacement of the femur
  3. increased inclination of the acetabular roof
34
Q

Normal acetabular angle range

A

12-29 degrees

35
Q

Most common carpal coalition bones?

A

Lunate and triquetrum

36
Q

Negative Ulnar Variance is associated with?

A

Avascular necrosis

37
Q

Sesamoid in the lateral head of gastrocnemius?

A

Fabella

38
Q

Os trigonum

A

Posterior talus

39
Q

Os Tibale Externum

A

Medial to navicular

40
Q

Os intermetatarseum

A

Between metatarsals

41
Q

Os peroneum

A

Next to cuboid

42
Q

Tarsal Coalition

A

Talocalcaneal synostosis

Diagnostic Imaging 1 (1 decks)

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