Page 137 - A Practical Guide to Equine Radiography

118 A PRACTICAL GUIDE TO EQUINE RADIOGRAPHY

Lateromedial (LM) (Figs 12.1–12.4) 3. Place a R/L marker on the dorsal side of the
VetBooks.ir 1. Stand the horse square with the cannon 4. Position the X-ray machine on the lateral
plate.
bone vertical to the ground in each direction
and ensure that all limbs are equally weight- side of the stifle.
bearing. The limb to be examined should be 5. Focus–film distance: 100 cm.
positioned caudal to the contralateral limb 6. Use a horizontal X-ray beam perpendicu-
and fully weight-bearing; this may facilitate larly aligned to the limb and plate.
plate positioning. 7. Centre the X-ray beam at the level of the
2. Place the plate in portrait orientation on femorotibial joint (proximal to the tibial
the medial side of the stifle as close as pos- crest), about 10 cm caudal to the cranial
sible to the limb. It is often tricky to extend edge of the leg.
the plate far enough up in the groin region; 8. Collimate tightly around the stifle to reduce
angling the plate alongside the abdomen of scatter.
the horse is recommended. 9. Exposure guide: 75 kVp, 30 mAs.

Figure 12.1 Positioning to obtain a LM view of the stifle.

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