Top: Minor-axis self-subtraction residual maps for systems with SPHERE-detected emission. The black bar in the top right corner of each panel indicates 1″, denoted as either angular differential imaging (ADI) or dual polarisation imaging (DPI), depending on whether the total intensity maps or the Stokes Q_ϕ component from Milli et al. (2026) are used. Bottom: Radial profiles through the self-subtracted residual maps, estimated inside the wedges shown in the top panel for each corresponding image. The colour-coding of the wedges matches the colour-coding of the radial profiles (black and blue). The profiles present estimated ±1σ uncertainties.