System for secure reloading of previous studies (BDS-V) relating to an image data study on a receiver node from a remote image sending node, comprising: - the receiver node for representing image data studies, which comprises a command unit with a signal sensor, wherein the signal sensor is indicated at the same time as the image data study (BDS') currently shown and is designed to capture an image request signal relating to the image data study (BDS') currently shown and wherein the command unit is designed, after capturing the respective image request signal, to generate a command (Be) and to send the same to a pseudonymisation unit, wherein the command (Be) contains control instructions, in order to load a previous study (BDS-V) from the image sending node relating to the image data study (BDS') currently shown, - the pseudonymisation unit on the image sending node, comprising: - an extractor, which is designed to extract an identification data set from the command (Be) upon receipt of the command (Be), - a loader, which is designed to access the image storage system (PACS) for loading the previous study (BDS-V) on the basis of the extracted identification data set, wherein the previous study (BDS-V) comprises an image data set, - a pseudonymisation processor, which is designed to generate a pseudonymised image data set (BDS-V') based on the image data set of the loaded previous study (BDS-V) relating to the loaded previous study (BDS-V), - a receiver node interface, which is designed to send the pseudonymised image data set (BDS-V') to the receiver node. - the receiver node for representing image data studies, which comprises a command unit with a signal sensor, wherein the signal sensor is indicated at the same time as the image data study (BDS') currently shown and is designed to capture an image request signal relating to the image data study (BDS') currently shown and wherein the command unit is designed, after capturing the respective image request signal, to generate a command (Be) and to send the same to a pseudonymisation unit, wherein the command (Be) contains control instructions, in order to load a previous study (BDS-V) from the image sending node relating to the image data study (BDS') currently shown, - the pseudonymisation unit on the image sending node, comprising: - an extractor, which is designed to extract an identification data set from the command (Be) upon receipt of the command (Be), - a loader, which is designed to access the image storage system (PACS) for loading the previous study (BDS-V) on the basis of the extracted identification data set, wherein the previous study (BDS-V) comprises an image data set, - a pseudonymisation processor, which is designed to generate a pseudonymised image data set (BDS-V') based on the image data set of the loaded previous study (BDS-V) relating to the loaded previous study (BDS-V), - a receiver node interface, which is designed to send the pseudonymised image data set (BDS-V') to the receiver node. - an extractor, which is designed to extract an identification data set from the command (Be) upon receipt of the command (Be), - a loader, which is designed to access the image storage system (PACS) for loading the previous study (BDS-V) on the basis of the extracted identification data set, wherein the previous study (BDS-V) comprises an image data set, - a pseudonymisation processor, which is designed to generate a pseudonymised image data set (BDS-V') based on the image data set of the loaded previous study (BDS-V) relating to the loaded previous study (BDS-V), - a receiver node interface, which is designed to send the pseudonymised image data set (BDS-V') to the receiver node.