Page 334 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

Musculoskeletal system: 1.8 Soft-tissue injuries 309

VetBooks.ir 1.597 1.598

1.600

1.599

Figs. 1.597–1.600 Although fibre alignment is
only visible on longitudinal views, transverse and
longitudinal scans should be used to interpret the
image. (1.597, 1.598) Follow-up scans 4 months after
injury. The lesion has filled in with hyperechogenic
tissue (poor on transverse scan) and fibre alignment
is poor on the longitudinal image. (1.599, 1.600)
Eight months post injury in another animal. The
lesion is iso- to slightly hyperechogenic to the normal
tissue, the margins are indistinct and there is good
restoration of fibre pattern on the longitudinal image.

Magnetic resonance imaging
Many studies in man and experimental animals have extent in chronic or older cases. Unfortunately,
shown a better correlation between histological tis- the cost of the technique, limited availability and
sue quality and MRI than with ultrasound. A recent impracticality in many situations make MRI less
study confirmed this in horses. It also revealed a convenient than ultrasound to diagnose and follow-
tendency for ultrasound to underestimate lesion up tendon lesions.