TPLO mesurements, CORA mesurements

[jcu...@gmail.com]

Hi,

Can you somebody help me with TPLO and other veterinary orthopedic mesurements in Horos?

Thank you

best 

Jan

[martin owen]

Hello Jan

Yes, I would be happy to help

I routinely use Horos for TPLO planning

what would you like to know?

The attached image is purely to illustrate that I do use Horos. it is not intended as an explanation. Please let me know how i can help and I will try

best wishes

martin owen

[martin owen]

Dear Jan

here s a couple of screen shots showing how you select the tools for 

a. doing the angle

b. drawing a circle. nb to make a circle, you need to press down Shift key at same time as using your mouse to make the oval. if you remove the Shift key, you create an oval. If you press Shift again and click your mouse, you reconvert the oval back to a circle.

i can do a screen recording (i have never done this before, but i ve looked and i see it is possible) of doing a tplo plan on Horos, if you like -let me know

best wishes

martin

Martin Owen BSc BVSc PhD DSAS(O) Dip. ECVS MRCVS
RCVS Recognised Specialist and European Specialist in Small Animal Surgery (Orthopaedics)
RCVS Diplomate in Small Animal Surgery (Orthopaedics), European Diplomate in Small Animal Surgery

Director
East of England Veterinary Specialists Ltd, 43 Cambridge Rd, Wimpole, Royston, Cambridgeshire SG8 5QD
t 01223 795023       e mar...@eoevets.com    www.eoevets.com

On 23 May 2018, at 05:53, J wrote:

Hi Martin

That is great. I am not able to draw the circle and lines....

Can you explain it for me?

Thank you very much

Best and many thanks

Jan

st 23. 5. 2018 v 0:19 odesílatel martin owen <m4rti...@gmail.com> napsal:

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[hugo...@gmail.com]

Hi Martin.

Thanks for your reply to this question. Your first image looks very good and detailed. Do you print it out for future reference, export it as a new dicom file with all tne measurements and annotations, or do you just delete it after you're done?

I was also wondering how you use Horos for CORA calculations (in CT studies, not 2D radiographs) to evaluate limb deformities for surgical correction. Do you have a specific workflow already in place for that? I do it occasionally but not often but it still takes a long time for me to get all the measurements.

Thank you

Hugo

[martin owen]

Dear Hugo

yes, i do normally export to dicom file, calling it ‘TPLO planner’

normally i leave all the annotations on the original but i remove them if i need to

Re CORA

i also do this occasionally

what i have done is to prepare a 3D volume render and then export to dicom a single image when the limb is aligned the way i want

here is an example, though it is not actually ideally positioned [its the first i ve found right now and i want to go to bed!!]

once the single dicom file is created and viewed in Horos, you can use all the annotation tools you would on a radiograph, like here

then i do all the measurements on this virtual image

[then at surgery, i use the measurements as a guide but these days, i always think that intra operative assessment of ‘ is it straight? is it derogated?’ is more important than ‘have i followed the plan?’

my impression is that rotation/torsion influences the assessment of the angles in a way that cannot be predicted and it often appears necessary to do larger angular corrections than calculated when a torsion is additionally corrected

hope this is of some interest

best wishes

martin owen

To view this discussion on the web visit https://groups.google.com/d/msgid/horos-project/37e72671-b8e9-42b2-afe3-a6abc0cee5d6%40googlegroups.com.