Page 418 - Adams and Stashak's Lameness in Horses, 7th Edition

384 Chapter 3

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Figure 3.202. “Street nail” injury with penetration of the navicular ating tract with marked peripheral contrast enhancement is identified
bursa.Transverse pre‐contrast (top row left), transverse post‐arterial extending from the medial sulcus of the frog through the DDFT at the
contrast (top row right), and MPR post‐arterial contrast CT images of level of the navicular bone. (Arrow) There is marked synovial
the right hindfoot of a 21‐year‐old Warmblood gelding, with a history enhancement of the navicular bursa. (Arrow heads) This led to a
of nail penetration through the sole. Lateral is to the left. A hypoattenu­ diagnosis of septic navicular bursitis secondary to nail penetration.

Figure 3.203. Articular cartilage defect of the distal interphalan­ is evidence of focal extension of the contrast material within the region
geal joint.Multiplanar reformatted CT images of the left front foot of a of the medial articular cartilage of both the middle and distal
10‐year‐old Warmblood gelding, post‐intra‐articular injection of phalanges, suggesting the presence of cartilage defects (arrows). This
iodinated contrast material in the DIP joint. Medial is to the left. There lesion could not be recognized with the realization of the arthrogram.

agent, pertinent soft tissue information can be obtained high contrast obtained from mineralized tissue and high
with CT. The comparison of the two modalities regard­ spatial resolution available. However, CT suffered from
ing bone imaging is interesting: CT has been classically the limitation of not being able to recognize acute “bone
considered the ideal technique for bone imaging with edema”‐type lesions identified with MRI. The introduction