EQUINE VETERINARY EDUCATION / AE / FEBRUARY 2022


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a)


b)


c)


Fig 2: Multi-planar reformatted transverse CT image (bone window) of the left front foot of a 17-year-old mare. Lateral is to the right. There is moderate deformation of the lateral aspect of the middle phalanx (arrow in a) caused by a hypoattenuating mass. There is a partial contrast enhancement surrounding the mass (arrow in b). The 3D reconstruction shows the mass blood supply (arrow in c).


a)


b)


c)


d)


Fig 3: a) and b) are multi-planar reformatted arthrographic CT images (bone window) of the left front distal interphalangeal joint (DIP) of a 6-year-old gelding. There is pooling of the contrast agent in the cartilage with direct contact with subchondral bone of the medial aspect of the DIP joint (arrow). This may indicate a full-thickness cartilage erosion. The horse underwent standing low field MRI of the foot (c and d) post-CT, to assess the presence of fluid-based pathology in the subchondral bone plate. MRI showed mild-to-moderate thinning of the cartilage on the medial aspect of DIP (arrow), and the subchondral plate was normal. The severity of the chondropathy was less obvious on MRI versus CT (medial is to the right).


machine if the horse retracts his limb during the scan (Fig 5D). To minimise the horse leaning against the gantry,


additional ropes at the level of the horse’s shoulder are fixed to side columns. They are attached to the platform frame providing the stability of the patient when the gantry


slides away from the patient (Fig 5F). Sliding of the gantry during the scan creates a gap between the ground and platform (Fig 6b). The safety wood extension (Fig 5E) prevents the horse stepping in this and provides extra support to the CT table.


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