Diagnostic ultrasound ( PDFDrive )

CHAPTER 55 The Pediatric Hip and Other Musculoskeletal Ultrasound Applications 1925
C
D
E
F
FIG. 55.1, cont’d (C) Normal hip sonogram shows sonolucent femoral head (H) resting against the bony acetabulum. Note ibrocartilaginous
tip of labrum (solid arrow) and junction of bony ilium and triradiate cartilage (open arrow). (D) Normal hip sonogram with alpha (a) and beta (b)
angles used in measurement. (E) Dislocated hip sonogram shows displacement of femoral head (H) laterally with deformity of labrum (curved
arrow). (F) Dislocated hip sonogram with abnormal alpha and beta angles. H, Femoral head; i, iliac line; L, lateral; m, femoral metaphysis; S,
superior.
Coronal/Flexion View
In the coronal/lexion view the transducer is maintained in a
coronal plane with respect to the acetabulum (Fig. 55.2A) while
the hip is moved to a 90-degree angle of lexion. During the
assessment in this view, the transducer is moved in an anteroposterior
direction with respect to the body to visualize the entire
hip. Anterior to the femoral head, the curvilinear margin of the
bony femoral shat is identiied. In the midportion of the acetabulum,
the normally positioned femoral head is surrounded by
echoes from the bony acetabular components (see Fig. 55.2B).
Superiorly, the lateral margin of the iliac bone is seen, and the
transducer position must be adjusted so the iliac bone becomes
a straight horizontal line on the monitor. his landmark (iliac