In a method, a device and a computer program product for provision of image data such as thin slice image data and thick slice image data of a server to a client, the image data having been acquired by an imaging modality and being cached in a cache acting as a server; the image data are provided to the client by involving the client in data exchange with the server, and an information system that is likewise involved in data exchange with the server is always automatically informed about a current state of the cache, in particular about thin slice image data available in the cache. The client directly or indirectly accesses the image data of the cache for automatic provision of the image data.