| A | B |
|---|
 | Angle Of Cervical Curve |
 | Atlantodental Interspace; Adults 1-3 mm, Kids 1-5 mm |
 | Chamberlain's Line; <3 mm, indicates basilar impression |
 | Cobb's Angle |
 | Femoral Angles (Vara, Normal: 120-130, Valga) |
 | Ferguson Method |
 | George's Line; continous without interruption |
 | Interpediculate Distance; >21 mm, Assess spinal canal & rule out stenosis |
 | Klein's Line; line should intersect the femoral head symmetrically |
 | Lumba Gravity Line; line should intersect with the anterior one quarter of the sacrum or the same distance anteriorly |
 | Lumbosacral Disc Angle; normal - 10–15 degrees |
 | McGregor's Line; indicates basilar impression |
 | Posterior Cervical Line; posterior or anterior displacement |
 | Sacral Base Angle; 26-57 degrees |
 | Sagittal Canal |
 | Sagittal Diameter of Vertebral Canal; rule out/confirm narrowing of the canal |
 | Shenton's Line |
 | Skinner's Line; Normal: fovea capitus should lie above or at the level of this line |
 | Retrotracheal Interspace; from C5, C6 and C7, normal - 20 mm |
| Retropharyngeal Space; C2, C3, normal: C2 - 5mm, C3 - 7mm |
 | Acromioclavicular Joint Space; F: 2.1-3.7 mm, M: 2.5-4.1 mm |
 | Acromiohumeral Joint Space; 7-11 mm |
 | Boehler's Angle; 28-40 degrees |
 | Boehler's Angle; 28-40 degrees |
 | Glenohumeral Joint Space; 4-5 mm |
 | Teardrop Distance; 6-11 mm and no greater than 2 mm b/t sides |
