Chapter 9

EXERCISE 2: WHAT STRUCTURE IS THIS?

Exercise 2 Objective: Teach the user to recognize radiographic anatomy correctly on the normal radiographs of the routine evaluation of the cervical spine pelvis and hip.

Exercise type: 2: What Structure is This?

Instruction: User will look at the highlighted structure and identify it from a list of five possibilities.

View: Anteroposterior Pelvis

What structure is this?

A. sacral foramen

B. obturator foramen

C. sciatic notch

D. coccyx

E. anterior inferior iliac crest

Question Rationale: The sacral foramina image as paired radiolucent ovals on either side of the sacrum.

What structure is this?

A. sacral foramina

B. obturator foramen

C. sciatic notch

D. coccyx

E. anterior inferior iliac crest

Question Rationale: The anterior inferior iliac crest is a prominence on the outer lateral border of the ilium.

What structure is this?

A. sacral foramina

B. obturator foramen

C. sciatic notch

D. coccyx

E. anterior inferior iliac crest

Question Rationale: The obturator foramen is a large radiolucent area bounded by the pubic ramus superiorly and the ischium inferiorly.

What structure is this?

A. sacral foramina

B. obturator foramen

C. sciatic notch

D. coccyx

E. anterior inferior iliac crest

Question Rationale: The sciatic notch is imaged as a narrow inverted u-shape at the tip of the iliopubic and ilioischial lines of the inner pelvic brim.

What structure is this?