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Fig. 2 —Seventeen frames show normal imaging findings for healthy 63-year-old man obtained using normal vibration response imaging device (VRIxp, Deep Breeze). Imaging progresses and regresses vertically and in synchronized manner from top to bottom in both inspiration (Ins) and expiration (Exp). Projections of right and left sides of image are same as standard posteroanterior chest radiograph—that is, left lung is shown on right side of image. Right and left sides of images develop simultaneously from early frames (frame 1, 2, or 3) to maximum energy frame. Shape of maximum-energy-frame image is smooth (e.g., frame 5) and rounded and has uninterrupted contour. Area and gray-scale intensity of right and left sides of maximum-energy-frame image are similar. Normal maximum-energy-frame image does not have missing areas.