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Weight Bearing CT Imaging for Cuboid Subluxations

Dr. Michael Chin, DPM, presented how weight bearing CT imaging has changed how he evaluates cuboid subluxations at the American Academy of Podiatric Sports Medicine meeting held near the West Point Military Academy campus in early September, 2015. Dr. Chin began using the pedCAT in his office in February of this year. Not much research is out there on how to use plain radiographs to measure cuboid subluxations, Dr. Chin said in his lecture, titled, “Cuboid Syndrome…The Other Side of Heel Pain.” Dr. Chin has tested using a bilateral oblique projection to understand the cuboid/ metatarsal relationship, and has been able to observe a slide between the head of the fourth metatarsal and the head of the cuboid. An MRI could be ordered to see the condition of the peroneal tendon, but the study would be limited because the scan would not be weight bearing, he said.. A traditional CT scan would provide great visualization of the bone, but would provide no information on anatomic alignment. The pedCAT weight bearing CT imaging system is excellent for evaluating stress fractures, sesamoids, periosteal changes, or anything medullar, Dr. Chin said. Another benefit is he can measure the exact degree of subluxation between the cuboid and the fourth metatarsal head. Dr. Chin displayed pedCAT images depicting pre and post-reduction views of a cuboid subluxation. pedCAT scan of a pre-surgical patient with cuboid subluxation. Dr. Chin was able to reduce the subluxation to 2.18 mm. Dr. Chin practices at The Running Institute in Chicago.
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pedCAT: Fracture & Fusion Assessments

X-rays of the foot and ankle may not always provide conclusive assessments for post-operative fusions such as of the tarso-metatarsal joint or hind foot joints. Similarly, the physician is often left guessing if a fracture has properly healed. “The pedCAT takes all the variability out, all the guesswork out of it,” Dr. Martin O’Malley, MD, an Associate Attending Orthopedic Surgeon at the Hospital for Special Surgery in New York, New York, said. Dr. O’Malley said pedCAT scans allow him to clearly determine if a fusion has healed more than 50 percent, and he decides when to ambulate his patient accordingly. “I let people walk on it earlier than before, and I keep them off longer than before,” Dr. O’Malley said. The pedCAT provides a three-dimensional view of fractures that changes the way O’Malley sees this common diagnosis. “These posterior pieces are often bigger than we thought were based on plain X-ray and they often travel all the way around the medial side as well, which we never thought they did,” Dr. O’Malley said. “You know, we thought it was an infrequent fracture, but now we see it routinely. Now most of my ankle fracture work, I’d say more than half the time, is through a posterior approach. For the first 15 to 18 years of my practice I would do medial/ lateral incisions. Now I’m going to the back of the ankle. And a lot of it is driven by the pedCAT.” pedCAT Stress Fracture Cross Section Click on the blog post title to see an example of a navicular stress fracture in a collegiate runner that had not healed at all after six weeks of casting. Were it not for the conclusive pedCAT scan, this patient would have been allowed to ambulate. Watch Dr. O’Malley talk more about the pedCAT here . To offer your patients state-of-the-art fracture & fusion assessment, consider a pedCAT for your practice.
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Welcome to the CurveBeam Blog!

Welcome to the CurveBeam Blog! It’s an exciting time at CurveBeam. Almost two years ago  we received FDA-approval for our first product, the pedCAT. The in-office 3D weight bearing imaging system for the foot and ankle has been integrated into orthopedic…

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