The beam set up window allows automatic isocenter location at the center of any region defined.

Blocks and beam apertures can be automatically or manually defined to spare or treat a given region or sum of regions.

Beam parameters can be set graphically with the mouse or can be enter with the keyboard.

All degrees of freedom are allowed: gantry, collimator and couch rotation.

Beam isocenters can be modified individually or all together.

Rotating and pendular photon beams are supported.

With just one click, you can switch from DRR to Beam's Eye View or digital image reconstructions orthogonal to beam axis. DRRs are generated in kilovoltage range (simulator) or megavoltage range (portal view).

Up to three alternative treatment plans can be defined and compare simultaneously.

Axial, sagital and coronal Image reconstruction sets can be obtained to visualize patient anatomy and dose distributions. Reconstruction in planes orthogonal to beam axis is also possible.

A navigation point allows automatic correlation between different views making possible the navigation throughout patient's anatomy in image reconstruction sets of different orientation.

Dose distributions are shown in windows containing image reconstructions, axial, sagital, coronal or even oblique views orthogonal to any beam axis.

Dose distributions can be displayed as isodose lines or dosewash.

The user may compare different plans watching simultaneously the dose distributions for the same set of images in different windows for different plans, all of them correlated by the navigation point.

Comparisons can be made clearer displaying in dosewash the difference in dose distribution for two alternative treatment plans.

Points of interest can be defined to monitor the dose. Dose profiles can be plotted between any two points.

Dose Volume Histogram window shows not only the DVH itself, but also the volume, maximum, mean and minimum dose for each region of interest. DVH from different plans can be displayed in the same window to allow direct comparison.

Three dimensional windows show regions, isodose surfaces, segmented regions and beams. The user can select the way the object is displayed from a variety of options: translucent, solid, wire, mesh, etc. Adequate coverage of the target sparing of normal tissue can be easily evaluated with these tools.

Win PLT 3D employs convolution / superposition (CVSP) method as dose calculation algorithm. Convolution Superposition is a truly three dimensional method and represents the state of the art in photon beam dose distribution calculation.

The energy released by the radiation beam at each point is calculated. The absorbed energy (dose) is subsequently obtained by the integration of all dose components using scattering kernels.

Integration is accelerated by the use of fast Fourier transformations (FFT), improving calculation speed.

CVSP radically differences from other algorithms mainly based on the correction of experimental measurement, because CVSP models the radiation beam adjusting parameters such as spectrum, source size, flattening filter and distance between source and jaws, among others.

Beam commissioning is made through the auxiliary application WinCom. Experimental data can be imported from automatic phantoms and dose distribution in the phantom can be calculated using CVSP. By iteratively changing beam parameters, the user fits the experimental data.

WinCom has a user friendly graphic interface combined with appropriate tools specially designed to compare experimental and calculated photon dose distributions. A relatively small set of experimental data is enough for commissioning and verification purposes.