Radiology Lines Review
Jeff Binder R.T. (R)
1.) yellow circle
2.)purple line
3.) red line
4. Blue lines
1.) ADI – Should be 1-5mm for children, 1-3mm for adults
2.)McGregors line – odontoid less than 8mm above this line
3.) Spinolaminar line – should be smooth curve
4.) Pre vertebral space – Top 5mm, middle 7mm, bottom 20mm
1.) Red angle
2.) yellow measurement
1.) Boehler’s angle – 28-40*, above or below this range is possible calcaneal
fx
2.) Heel pad measurement – Distance between skin and calcaneus. 25<mm =
acromegaly
Name the parts of the long bone
1.) Metaphysis
2.) Physis (growth plate)
3.) Epiphysis
4.) Diaphysis (shaft)
5.) Periosteum
6.) Apophysis (attachment site for ligament or tendon)
Blue line: Iliofemoral line. Should be smooth. Fx or Slipped femoral capital
epiphysis will disrupt the line
Yellow line: Shenton’s line. Should be smooth curve. Fx/SCE will disrupt
Purple angle: Femor Neck angle. 120*-130* is normal range. Above=Coxa Valga
Below=Coxa Vara
Red measurement: acetabular depth. 7-18mm average. Increased by
osteomalacia, Paget’s, or RA. Decreased in congenital hip dysplasia
Brown line: Skinner’s line, Fovea capitus must be below the horizontal line. Fx or
SCE will elevate the line.
Blue angle: Center edge angle; 20*-40*; increased by osteomalacia, Paget’s,
or RA. Decreased by join effusion
Orange line: Kline’s line; altered by FX or SCE
Red line: Kohler’s line; If femur head crosses the line then it is called
Protrusio Acetabuli. Osteomalacia, Paget’s, and RA cause it
Orange measurements: Superior (3-6mm), axial (3-7mm), and medial (413mm) (teardrop) distances
*never average these measurements
If medial joint space (teardrop) exceeds 11mm or 2mm between
right and left then Waldenstrom’s sign. Common in Legg-Calve-Perthes
Blue lines: Ac joint space. Average superior and Inferior. ~3mm
Red Line: Acromiohumeral joint space. 7-11mm
Rotator cuff tear decreases
Dislocation or joint effusion increases
Yellow lines: Glenohumeral joint space. Average all 3. 4-5mm
Posterior dislocation increases measurement
CPPD or OA decrease measurement
RAO Position
Structure, level, side
Right c4/5 IVF
The first IVF is C2/3 so count down from there. This is an ROA so the right side of
the neck is touching the film therefore RIGHT IVF’s will be visualized.
http://www.imaios.com/en/e-Anatomy/Spine/Spine-standard-radiography