Weasis is a Java-based application with a highly modular architecture, designed to help those working in medical fields view and analyze images and patient information contained in DICOM files.

The app is fully portable, making it possible to place it on any removable storage device, along with the DICOM files, so that you can view them on any machine without having to install Weasis.

Weasis can display multiple images at once, in a customizable layout, so that you can view, compare and analyze elements from multiple angles at the same time.

You can define which actions the mouse buttons and wheel should perform, from scrolling through images, controlling zoom level and rotation, to performing measurements or opening the context menu.

You can also specify which LUT should be used, window/level and rotation values, as well as apply various filters.

Weasis can display various annotations, such as the image scale, orientation, window/level values, zoom and rotation. You can choose which of these should be enabled, depending on the data you need to have at hand.

It can also perform multiple types of measurements. The Weasis app can calculate the distance between two selected points, the area or a user-defined shape, as well as angle values.

The Weasis application’s interface may take some getting used to, as its Java-based design becomes quite evident when you use the tool for the first time. It was created as a multi-platform utility, so its layout and menu placement will probably not be very familiar to Mac users.

Overall, Weasis is a feature-packed cross-platform application designed to help medical professionals view and analyze DICOM files. Weasis' modular structure ensures it can be further improved using plugins.