Term
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Definition
ADI:
The distance measured is between the posterior margin of the anterior tubercle and the anterior surface of the odontoid.
Adult 1 - 3 mm
Children 1 - 5 mm |
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Definition
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Term
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Definition
Chamberlain's Line:
Hard Palate to oposithion
Average: Below line to 3 mm above |
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Term
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Definition
Cobb's angle:
End vertebral endplate lines; then intersecting perpendiculars ; measure angle |
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Term
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Definition
Eisenstein's Method for Sagittal Canal Measurement:
Tips of superior and inferior articular processes, SHOULD NOT BE less than 15 mm |
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Term
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Definition
George's Line:
The posterior vertebral body surfaces are connected with a continuous line that traverses the intervertebral disc
Anterior to posterior vertebral malpositions when line is not smooth |
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Term
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Definition
Interpedicular Distance:
Shortest distance between inner surfaces of opposing pedicles, L1-L4=minimum 21 mm
L5= minimum 23 |
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Term
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Definition
| Lateral Border of Articular Pillars |
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Term
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Definition
Lumbar Gravity Line:
A perpendicular line from the center point of the L3 body, The line should intersect with the anterior one quarter of the sacrum or the same distance anteriorly |
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Term
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Definition
LumboSacral Disc Angle:
Angle between opposing endplates of L5 and S1
NORMAL RANGE 10-15 degrees |
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Term
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Definition
McGregor's Line:
Hard palate to occiput; note relative odontoid apex
Maximum is:
Males: 8mm; Females: 10mm
Basilar impression when odontoid is more than the maximum distances listed above above. |
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Term
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Definition
Spinolamina Junction Line:
If the curve is discontinuous at any level
then anterior or posterior displacement
may be present |
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Term
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Definition
Retropharyngeal Space:
Measured from anteroinferior body margins of C2, C3, C2, 5 mm; C3, 7 mm
Retrotracheal Space:
Measured from anteroinferior body margins of C5, C6, C7
less than or=20 mm |
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Term
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Definition
Risser-Ferguson Method:
END VERTEBRAE
APICAL VERTEBRA
VERTEBRAL BODY CENTER
Construct connecting lines through mid points of vertebrae. Measure acute angle |
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Term
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Definition
Sacral Base Angle:
Endplate of S1 to horizontal line angle
NORMAL RANGE 26–57 degrees |
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Term
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Definition
Sagittal Diameter of Vertebral Canal:
Narrowing of the canal (stenosis) may be present when the measurement is <12 mm. |
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Term
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Definition
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Term
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Definition
Thoracic Kyphosis Measurement:
T1 superior end plate to T12 inferior endplate; then intersecting perpendiculars measure the angle.
27-42 F 26-41 M |
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Term
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Definition
Depth of Cervical curve:
Odontoid apex to the posterior C7 body. Measure greatest distance to line, Min/Max: 7-12mm |
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Term
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Definition
Angle of Cervical curve:
Atlas plane line and C7 end plates; then intersecting perpendiculars, Min/Max: 35-45 degrees |
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Term
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Definition
Method of Gore:
A line is drawn through the posterior surface of the C2 body and another through the posterior surface of the C7 body. The acute angle formed by these two lines is measured |
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Term
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Definition
Method of Jochumsen:
C1 anterior tubercle to anterior C7 body; measure distance to anterior C5 body
Min/Max:1-9 mm |
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Term
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Definition
Pre Sacral Space
Soft tissue density between the rectum and anterior sacral surface.
Children 1-5 mm
Adults 2-20 mm |
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Term
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Definition
| Risser’s Sign (Iliac Epiphysis) |
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Term
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Definition
Waldenstrom's Sign TEARDROP DISTANCE
most medial aspect femoral head
outer cortex of pelvic teardrop
Normal: min 6 mm max 11 mm |
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Term
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Definition
FASCIAL PLANE LINES
Gluteus Medius Fascial Plane Line
Obturator Interunus Fascial Plane Line
Iliopsoas Fascial Plane Line |
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Term
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Definition
Kohler’s line
Line tangential to the cortical margin of the pelvic inlet and the outer border of the obturator foramen
Floor of the acetabulum lies lateral to this line
If the floor crosses this line:
Protrusio acetabuli
Idiopathic, RA, Paget’s disease and osteomalacia [YR p1514] |
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Term
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Definition
SHENTON’S LINE
Smooth curvilinear line along medial femoral neck and superior obturator border. Constructed along undersurface of the femoral neck. Should be continuous. Femur dislocation or fracture if line is interrupted. |
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Term
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Definition
Iliofemoral Line
Smooth curvilinear line along ilium and onto femoral neck; should be bilaterally symmetrical. Asymmetry may denote hip joint abnormality. |
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Term
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Definition
Lines through the axis of the femoral shaft and neck.
Coxa Vara Less than 120 degrees
Normal Femoral Angle 120-130 degrees
Coxa Valga More than 130 degrees |
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Term
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Definition
SKINNER’S LINE
Normal: fovea capitus should lie
above or at the level of this line |
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Term
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Definition
KLEIN’S LINE
This line should intersect the femoral head symmetrically.
If it is asymmetrical, then slippage of the femoral capital
epiphysis should be considered
Straight line along the
outer margin of the
neck of the femur |
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Term
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Definition
AC interspace distance or Separation
Acromioclavicular Joint Space
Normal: 2-4mm
M 3.3 m F 2.9 mm |
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Term
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Definition
Glenohumeral Joint Space
Normal: 4-5 mm |
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Term
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Definition
Acromiohumeral Joint Space
Range 7 – 11 mm
May indicate post-traumatic subluxation, dislocation,
joint effusion, stroke, brachial plexus lesions |
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Term
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Definition
Boehler’s Angle
Normal 28-40 degrees |
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Term
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Definition
Heel pad measurement
Increased - acromegaly |
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