Line Analysis

Question 1

Possible misalignments obtained from a lateral cervical view

Answer 1

Occiput = PS or AS
C1 = AS or AI
C2-C7 = Posteriority or P

Question 2

Lines used for a lateral cervical view

Answer 2

1) Foramen Magnum Line (FML)
2) Atlas Plane Line (APL)
3) Odontoid Line (OL)
4) Odontoid Perpendicular Line (OPL)
5) Base Line (BL)
6) Listing Line (LL)

Question 3

Divergence of the FML and APL lines indicate:

Answer 3

Occiput misalignment (PS or AS)

Question 4

Divergence of APL and OPL indicate:

Answer 4

C1 misalignment (AS or AI)

Question 5

If adjacent DPL’s intersect on the film, then a ___ misalignment is considered

Answer 5

P (posteriority)

Question 6

Possible misalginments obtains from a cervical APOM view

Answer 6

Occiput = Wedging and rotation 
C1 = Laterality and rotation 
C2 = Rotating and wedging

Question 7

Lines drawn for a cervical APOM view

Answer 7

1) Transverse condylar line (TCL)
2) Transverse Atlas Line (TAL)
3) Axis Plane Line (AxPL)
4) Listing Line (LL)
5) Base Line (BL)

Question 8

Divergence of TCL and TAL indicates an:

Answer 8

Occiput misalignment (wedging and rotation)

Question 9

The wider right mass of atlas indicates that the right occiput can gone:

Answer 9

Posterior (Wider side of atlas = anterior; occiput is opposite to atlas, so right occiput is posterior)

Question 10

TAL and AxPL divergence indicate:

Answer 10

Atlas laterality (R or L)

Question 11

Distance of the C2 laminar junction to its own lateral border is used to indicate

Answer 11

C2 Spinous laterality (L or R)

Question 12

Divergence of the AxPL to the C3 baseline is used to indicate:

Answer 12

Wedging at the C2 level

Question 13

Lines and Landmarks for A-P Lumbopelvic view

Answer 13

1) Femur Head Line (FHL)
2) Horizontal Plane Line (HPL)
3) Superior Iliac Crests
4) Lateral Iliac Crests
5) Inferior Ischial Tuberosities
6) Medial PSIS’s
7) Lateral Borders of Sacrum
8) S2 Tubercle
9) Sacral grooves

Question 14

Ilium with a larger height (Superior Iliac Crest to FHL)

Answer 14

PI Ilium

Question 15

Ilium with a shorter height (Superior Iliac Crest to FHL)

Answer 15

AS Ilium

Question 16

The Sacral Center Line always passes through the pubic bone on the ___ side

Answer 16

EX

Question 17

The wider Ilium (from Lateral Iliac crest to Lateral sacral crest)

Answer 17

IN

Question 18

The smaller width ilium (from Lateral iliac crest to Lateral sacral crest)

Answer 18

EX

Question 19

The width between one medial PSIS and S2 sacral tubercle is >6 mm than the width between the other medial PSIS and S2 sacral tubercle.

Answer 19

P-(larger side)
Ex: right distance = 56 mm
left distance = 50 mm
ANS: P-R

Question 20

T/F Misalignment of sacrum posteirorly and to the left is listed as PL

Answer 20

FALSE.

It is listed as P-L