Page 175 - A Practical Guide to Equine Radiography

156 A PRACTICAL GUIDE TO EQUINE RADIOGRAPHY

Right 15º ventral-left dorsal oblique Open-mouth Right 10º dorsal-left
VetBooks.ir (R15V-LDO) and Left 15º ventral-right ventral oblique (R10D-LVO) and Left 10º

dorsal oblique (L15V-RDO)
dorsal-right ventral oblique (L10D-RVO)
(Figs 14.31 and 14.32) (Fig. 14.31)
1. Keep the mouth open with a gag that leaves 1. Keep the mouth open with a gag that leaves
the cheek teeth free. the cheek teeth free.
2. Place the plate on the affected side in a ver- 2. Place the plate on the affected side in a ver-
tical position and aligned with the area of tical position and orientated to the area of
interest. interest.

– R15V-LDO: outlines the left-sided maxil- – R10D-LVO: outlines the left-sided man-
lary cheek teeth erupted crown. dibular cheek teeth erupted crown.
– L15V-RDO: outlines the right-sided max- – L10D-RVO: outlines the right-sided man-
illary cheek teeth erupted crown. dibular cheek teeth erupted crown.

3. Indicate right/left (plate’s side) with a 3. Indicate right/left (plate’s side) with a marker.
marker. 4. Position the X-ray machine on the contra-
4. Position the X-ray machine on the other lateral side of the head.
side of the head. 5. Focus–film distance: 100 cm.
5. Focus–film distance: 100 cm. 6. Angle the X-ray beam, so that the X-ray
6. Angle the X-ray beam, so that the X-ray beam hits the dorsal plane (hard palate) at
beam hits the dorsal plane (hard palate) at a 10-degree downward angle.
a 15-degree upward angle. 7. Centre the X-ray beam at the level of the
7. Centre the X-ray beam 10 cm ventral to the rostral third of the facial crest.
rostral third of the facial crest. 8. Collimate around the area of interest.
8. Collimate around the area of interest. 9. Exposure guide: 77 kVp, 20 mAs.
9. Exposure guide: 77 kVp, 20 mAs.

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