3D Imaging, Ankle Surgery, Foot Surgery
Conditions
Brief summary
The automated TALAS measurement tool, working with the Cone Beam 3D scanner under load, provides a reproducible measurement of the Foot Ankle Offset (FAO). It is possible to determine an average value and the standard deviation of FAO in the relevant population. And to differentiate significantly the populations with a neutral alignment, varus or valgus.
Detailed description
The analysis of the alignment of the foot is fundamental in the management of pathologies of the foot and ankle. The advent of 3D imaging under load (Scanner Cone Beam), less radiant and more precise, requires the development and evaluation of new measurement tools. The automated TALAS measurement tool, working with the Cone Beam 3D scanner under load, provides a reproducible measurement of the Foot Ankle Offset (FAO). It is possible to determine an average value and the standard deviation of FAO in the relevant population. And to differentiate significantly the populations with a neutral alignment, varus or valgus.
Interventions
DIAGNOSTIC_TEST3D Imaging FAO measurement and Clinical evaluation of the hindfoot alignment
The Cone Beam under load is used for the diagnosis and monitoring of the foot and ankle. It has a CE marking for this purpose. The images obtained by the Cone Beam under load (Ped Cat) will be analysed using the TALAS mathematical algorithm tool to measure the FAO. The internal software of the Cone Beam under load will also be used to obtain a "radiographic" image corresponding to a 2D projection on which the tibio-calcaneal angle can be measured.
Sponsors
GCS Ramsay Santé pour l'Enseignement et la Recherche
Dr François Lintz
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patient selected for a preoperative assessment in foot or ankle surgery, or patient seen in follow-up consultation for which a Cone Beam under load is prescribed * Patient having been informed of this study and having given their consent * Patient over 18 years old * Unprotected adult
Exclusion criteria
* Patient with a contraindication to the Cone Beam under load * Patient refusing to participate in this study * Non-plantigrade foot under load (impossibility of simultaneously resting M1, M5 and Calcaneus on the ground) * Patient who has already participated in the 3D HAM study (patients who would have participated in the study during the preoperative consultation for which another Cone Beam would be prescribed during the follow-up consultation. These patients would not be able to participate again in this study).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| FAO value measured | 1 day | \- FAO value measured using the TALAS tool on data collected by the Cone Beam under load (PedCat). For the descriptive study of the distribution within the different populations (varus/normal/valgus), the first measurement carried out will be represented. |
| FAO Reliability | 1 day | \- reliability of FAO measurement by the TALAS tools (Intraclass correlation coefficient) |
| FAO sensitivity-specificiy | 1 day | \- Couples (Sensitivity - Specificity) of the FAO ROC curve allowing the morphological classification of the patients (Varus, Valgus or Normal) |
Countries
France
Outcome results
None listed