System and methods for determining placement of a transducer array relative to a subject's head, which may be used in treating cancer in the subject, are provided. These techniques may include constructing, based on one or more images, a representation of the subject's head that includes information for a plurality of structures including one or more tumors positioned within the subject's brain. The representation of the subject's head may be used to calculate electric field propagation for one or more arrangements of a transducer array on a surface of the subject's head. These techniques may further include determining one or more rate of energy absorption distributions and/or one or more electric field distributions using the calculated electric field propagation for multiple arrangements of the transducer array. A rate of energy absorption distribution may indicate a rate of energy absorbed at the one or more tumors. An electric field distribution may indicate an amount of electric field at individual regions of the subject's brain that include the one or more tumors and span across the entirety of the subject's brain. Using the one or more rate of energy absorption distributions and/or the one or more electric field distributions, an indication of how to place the transducer array on the subject's head such that at least a portion of the one or more tumors are exposed to electric fields emitted by the transducer array may be generated.La présente invention concerne un système et des procédés permettant de déterminer le placement d'un réseau de transducteurs par rapport à la tête d'un sujet, qui peuvent être utilisés dans le traitement du cancer chez le sujet. Ces techniques peuvent consister à construire, sur la base d'au moins une image, une représentation de la tête du sujet qui comprend des informations pour une pluralité de structures comprenant au moins une tumeur positionnée à l'intérieur du cerveau du sujet. La représentation de la tête du sujet peut être
