If your horse needs food radiographs, your veterinarian may discuss the benefits of a view of a normal horse foot radiograph versus navicular. Horse foot radiographs have differing levels of complexity, and alternative views are often needed to assess the structures within the hoof walls. Let’s find out everything you need to know about horse foot radiographs!
View Of A Normal Horse Foot Radiograph Versus Navicular
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If you need to take your horse for foot radiographs, it can be difficult to know what to expect. Here we will take a look at the different radiographic views used to diagnose common problems of the horse’s foot.
The view of a normal horse foot radiograph versus navicular is used to differentiate between the individual bones in the foot of a horse. The lower limb anatomy of a horse is very complex, and many different radiographic views are needed to assess all the structures accurately. This is one of the most complex areas of a horse to radiograph and requires considerable skill to carry out to a high standard.
Here are some of the most common views that will be taken when a horse has a series of foot radiographs:
Lateromedial Foot Radiographs
The lateromedial view of a horse’s foot is one of the most common types of radiographs you will see performed. This view gives us an image of the horse’s lower limb from the side and is often used to assess horses with laminitis. This is because changes to the position of the distal phalanx can be identified and assessed.
This view also gives a clear image of the joints of the lower limb, helping to diagnosis arthritis and other synovial changes. The navicular bone will be visible on a lateromedial foot radiograph, but not clearly enough to assess it fully.
Dorsopalmar / Dorsoplantar Foot Radiographs
This radiographic view of a horse’s foot is an image taken from the front of the hoof. It is often used to assess the balance of the horse’s hoof, as well as degenerative changes such as ringbone and sidebone. The navicular bone is not clearly visible on this radiographic view, is it is superimposed by the other bones within the hoof walls.
Upright Pedal Radiographs
The upright pedal bone radiographic view is used to give a clear image of the distal phalanx, although it can also be used to assess the navicular bone. Two techniques can be used to acquire this view, with slightly different results.
The first method involves placing the X-ray cassette inside a protective casing on the floor, then standing the hoof of the horse on the cassette. The X-ray machine is placed in front of the horse, with the beam directed downwards through the distal phalanx.
The second technique lifts the hoof so that it is placed flat against the cassette in a special holder. The X-ray beam is directed horizontally to obtain a clear image of the distal phalanx.
With both techniques, the angle of the beam is altered according to the area of interest. It is also necessary to pack any crevices within the foot with putty, as these will show up as artifacts on the final radiograph.
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Navicular Skyline Radiographs
This is one of the most challenging radiographic views for an equine radiography technician, as it requires precision and accuracy. The aim is to get a clear radiographic image of the navicular bone, without the superimposition of any other bones of the hoof.
To do this, the X-ray cassette is placed inside a protective holder on the ground, with the horse standing on top of this holder. The leg is positioned so that the hoof is further back than normal, opening up the angle of the pastern. The X-ray machine is placed behind the leg, angled downwards through the navicular bone.
Whilst this is a tricky radiographic view to obtain, it is invaluable in diagnosis problems with the navicular bone in horses. Degenerative changes to the navicular bone are a common cause of lameness in horses, and this radiographic technique is the best way to achieve a clear view of this small but vital bone.
Summary – View Of A Normal Horse Foot Radiograph Versus Navicular
So, as we have learned, the view of a normal horse foot radiograph versus navicular is used to differentiate between the individual bones in the foot of a horse. The lower limb anatomy of a horse is very complex, and many different radiographic views are needed to assess all the structures accurately. This is one of the most complex areas of a horse to radiograph, and requires considerable skill to carry out to a high standard.
We’d love to hear your thoughts on view of a normal horse foot radiograph versus navicular! Have you ever seen a horse having a series of foot radiographs? Perhaps you’ve got some questions about why different radiographs of the horse’s hoof are needed? Leave a comment below and we’ll get back to you!
What Does Navicular Look Like In Horses?
Navicular disease is a common problem in horses caused by degenerative changes to the navicular bone in the hoof. This will cause lameness, often of both forelegs. Radiographs will show deterioration of the navicular bone, which, along with clinical signs and a full lameness workup, will help to give a diagnosis of navicular syndrome.
What Are The Most Common Signs Of Navicular Syndrome?
As navicular syndrome often occurs in both fore feet of the horse, lameness may not be very obvious at first. The horse might appear more lame when it turns a corner, putting more weight on the inside foreleg. It may also stumble, and suffer from poor performance or evasion of ridden work.
How Do You Diagnose Navicular In Horses?
When diagnosing navicular in horses, the source of the pain is normally confirmed using nerve blocks. Radiographs will then be taken to assess the health of the navicular bone. If these are not conclusive, your veterinarian may recommend a MRI scan.
Should You Ride A Horse With Navicular Disease?
A horse with navicular disease should only be ridden if it is not lame or in pain. Ride only on soft ground, and avoid high impact activities such as jumping.