A mammography comfort device comprises a compressible bolster and a separate x-ray transparent compressible pad. The bolster, affixed to the sides of a bucky, retains the pad on the imaging surface. A radiopaque identifier permanently affixed to the pad imparts information about the pad onto a mammogram. The comfort device can be used with an x-ray transparent disposable cover. A kit comprising at least two disposable covers and a comfort device can be supplied. A separate stretchable retainer holds a breast on the bucky and serves as an exposure equalizer. A compression paddle adapted with a bolster and a light transparent panel facilitates proper placement of a breast for compression. When the bolster comprises sections having different identification force deflection values the panel angles to the approximate shape of a compressed breast to distribute compression force more evenly. A vented panel provides for passage of warm air for patient comfort.