Influence dosimetric study of different couches in radiotherapy treatments

Posted on: 2022-08-08

Last month, the Brazilian Journal of Radiation Sciences published an article called “Influence dosimetric study of different couches in radiotherapy treatments”, carried out by researchers from the Institute for Energy and Nuclear Research (IPEN-CNEN/SP). Check out the abstract:

“Radiotherapy is a recommended procedure, in average, for 52% of cancer cases as one of the treatment forms, therefore, it is important for the clinical practice to investigate the affecting factors in dose distribution received by the patients, and for example, devices and treatment couch.

With the introduction of treatments with modulated intensity techniques like IMRT and VMAT, the number of incidence fields used for patient treatment increased, which makes the couch’s dosimetric effect more significant in these modalities.

The attenuation data acquisition referring to the treatment couches, as well as the TPS data evaluation, show as important parameters for the clinical practice because they show what happens with the dose delivery during the treatment, ensuring a better quality and safety to the treatments.

This research presents experimental results evaluating the couch’s impact in the treatments by a study of perturbation in the distribution of surface dose, dose attenuation according to the gantry’s angle for the couches BrainLABTM, ExactTM and iBEAMTM.

Then we propose better density values for the couches BrainLABTM and ExactTM for their inclusion in EclipseTM TPS. Lastly, we compare the dose difference considering the presence or not of couch in the planning.”

Read the full article by clicking here.

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