OptoGait - The two-dimensional system

Optogait - Logo - Microgate

Starting from version 1.7 of the OptoGait software it is possible to use a particular bar configuration for obtaining a two-dimensional measurement area. To the classic bars (which we will call X), more bars (Y) can be added to form a rectangle, where new information can be gathered for the gait tests:

  • Step widthdistance between the middle support point of each foot
  • Walking Basedistance between the innermost foot support points (for superposed steps this value can be negative)
  • Walking Pointsmiddle points between the two support feet; their connection defines the gait progress (Line of Progression); conventionally it is expressed in positive values if there is a deviation towards left and negative with a rightward deviation
  • Walking Point Gapprogressive variation of the current walking point with respect to the previous one
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate


  • The regular OptoGait bars have a maximum transmission/reception distance of 6 meters; with this hardware you can use at the most 5 meters of 'X' bars and approx. 50 cm of room with the 'Y' bars.
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

La barra normale Y TX di chiusura solitamente è una barra SENZA torretta d’interfaccia. Con una modifica al firmware della barra TX con torretta (già incluso in tutti gli esemplari con Serialnumber maggiore uguale a 00250) è possibile però utilizzare anche quest’ultimo tipo di hardware. In questo modo ad es. con un Sistema Modulare da 5 Metri (Kit £OGA051) si sfrutta tutto l’hardware a disposizione costruendo un sistema lineare di camminata di 4 metri. In presenza di Serialnumber minori di 00250 è possibile spedire la barra a Microgate o al proprio distributore per un aggiornamento gratuito (spese di spedizione di andata e ritorno escluse). E’ comunque anche disponibile l’opzione di acquisto di una o più barre aggiuntive TX singole.

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

2D Boosted Bar

The maximum length of the 2D course can be increased up to 13 meters purchasing one or more special Y TX bars called '2D-Boosted.' This kind of bar is equipped with stronger transmission LEDs compared to the others and has a front aluminum cover instead of the transparent lenses, in order to direct the narrow infrared LED beam. To help the Y bar alignment at great distances (especially with not perfectly smooth ground), the 2D-Boosted bar is equipped with mechanical trimming devices for applying micrometric elevation and inclination changes.


Optogait - Il sistema bidimensionale - Medical Rehab | Microgate
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

Il collegamento tra le barre poste su lati perpendicolari avviene tramite un cavo di lunghezza variabile (normalmente 1,5/2 mt.); ciò consente di distanziare l’area vera e propria di misura (che è sempre quella formata dalle barre tradizionali, rettangolo ombreggiato nella figura sottostante) dalle barre Y; tale spazio permette al paziente di uscire dall’area di test senza dover “scavalcare” le barre oppure –più frequentemente- di girarsi di 180° per compiere una seconda camminata di ritorno. Il software, infatti, permette di effettuare un numero indefinito di percorsi avanti/indietro, consentendo così di registrare un numero sufficiente di passi anche con sistemi lineari di pochi metri.

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate


Patient Module

The first result of the 2D configuration on the software is the addition of a new 'Foot Width' field in the Patients' Personal Data. Similarly, this parameter is already present for the foot length and can be measured automatically (and simultaneously) by the system using the <Acquire Foot> function on the patient's card. During acquisition it is advisable to keep the foot as perpendicular as possible to the X and Y bars..

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

Test Module

A new test type called '2D Gait Test' has been added (more test and protocol types will be added, such as Tapping, Drift, etc., which will make use of the 2D hardware).

With this new type it is NOT necessary to specify the number of (X and Y) bars connected, as this is detected automatically by the software (the only limitation is that the number of X bars must be >= Y bars).

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

As highlighted, the measurement area is always the area covered by the X bars and not by the whole rectangle; this is very important with respect to the 'Start' parameter; if the athlete starts inside the rectangle, but in any case before the beginning of the X bars, this must be defined as 'OUTSIDE the Area'

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

The 'Starting Foot' field contains only the Automatic option and therefore it is no longer necessary to define beforehand if the gait begins with the right or left foot, as the Y bars detect it automatically.

For certain situations it is in any case still possible to change the starting foot during the test phase (Results > View) using previous methods (right click on the grid and 'Change Starting Foot' context menu) or via a new function with two buttons in the Gait Report section. Just press the icon of the required foot to set it as starting foot (the one currently used is colored, whereas the other is grayed out). 

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

The 'Template' field, which previously contained various gait types besides the normal one (shuffling gait, short steps, short steps tip-tip, etc.) has been considerably simplified; thanks to the greatly improved algorithms for the automatic recognition of various patterns, it has been possible to reduce the various types to only two, i.e. 'Normal' and 'Overlapping walk.'

Similarly to the foot change, a rapid method has been added for changing the template directly from the Gait Report using the relevant button.

Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

In the Secondary Parameters of the 2D Gait Test there are 4 new parameters, which can already be applied during test definition or during the trial analysis (<Parameters> button).

  • Minimum Gap between Feet (width): parameter required by the filter algorithms for specific cases
  • Minimum Foot width: similar to the minimum foot length; smaller measures are skipped, because they are considered spurious
  • GaitR In and Out Filter: The two parameters expressed in number of sensors (LEDs) indicate the minimum number of sensors interrupted by the gait and triggering the start of the foot contact time (GaitR IN) and the end of the same time (GaitR OUT). See here for a more detailed description
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate

Results Module

In the Results display section, the new features of the 2D hardware are:

  • Step Width in the Gait Report
  • Step Width, Walking Base, Walking Point, Walking Point Gap columns added to the Gait Data
  • In addition to the Gait report, as described above, buttons are available for rapidly changing the 'starting foot' and the 'gait type' template
  • The simulation of the footprints and of the interrupted LEDs also shows the status of the Y bars and the line of progression data from the walking points 
  • A zoom (+ / -) toggle button is featured for increasing the footprint area; the area is furthermore divided by a grid and the indication of the sensor number
  • A new search parameter has been added (First Entry and Next Entry) for rapidly finding the first entry in the measurement area or the following entries in case of roundtrip tests.
Optogait - Il sistema bidimensionale - Medical Rehab | Microgate