Customized Foot Orthosis Development by 3d Reconstruction of the ct Images
Sathish Kumar Paul, Sudesh Sivarasu, Lazar Mathew Engineering, Vol. 4 No. 10, 2012
Nice simple CAD approach if you are just looking to match the superior surface of the orthosis to the plantar foot shape. I'm not sure what the computed tomography brings to this that couldn't be achieved with any other 3-dimensional scan of the foot, i.e., structured light or laser scan?
What if we took a weight bearing/pathological position MRI verse a non-weight bearing/no painful MRI - If this is even possible or appropriate.
Compare the tissue displacement associated with the pathology and then design an orthoses to apply the appropriate force. e.g spring ligament overload = increased orthoses angulation/pitch on the appropriate part of the planantar surface.
But that's not what they are doing, all they are doing is using the virtual positive model of the foot to stamp a form into a virtual block of material.
What if we took a weightbearing "kinetically quantified" cast and scanned that in to do the stamping...
Dear All
The study said they used feet that had normal function and no muscle problems.
I have yet to see one.
I would like to know their criteria for finding such feet.
Having used 3D imaging to see what is occuring in the foot one has to remember that only a saggital plane image is made and then is reconstructed by the machines software.
When we did the studies we used both sagittal and frontal plane to see if there were image differences and we found there were some differences but not worth the extra radiation for the patient
Alex Petsogolou and myself developed the 'angles of PAulex'
if you would like to see them goto www.musmed.com.au and you will find them there.