Projection system for image projection of anatomical features on a subject, comprising a plurality of intraoperative position markers removably disposed on a first body surface; a moveable first detector for intraoperative detection of the plurality of intraoperative position markers and having a detection line of sight; and a control unit arranged for receiving one or more preoperative images comprising one or more anatomical features of interest, each of the preoperative images comprising a plurality of preoperative position markers, wherein the control unit is further arranged for registering the detected plurality of intraoperative position markers with the plurality of preoperative position markers in each of the preoperative images; the projection system further comprising a movable projector having a projection line of sight and being configured for projecting an image representation of the one or more anatomical features of interest on a second body surface, the projection line of sight being substantially parallel to the detection line of sight, the projected image representation being based on the one or more preoperative images and the registered plurality of intraoperative position markers with the plurality of preoperative position markers, wherein the control unit is in communication with the first detector and projector and arranged for real-time image projection of the image representation on the second body surface by the projector independent from synchronized movement and varying detection and projection angles of the first detector and the projector during relative motion between the subject and the first detector and the projector, and wherein the projected image representation is a steady image projection. a plurality of intraoperative position markers removably disposed on a first body surface; a moveable first detector for intraoperative detection of the plurality of intraoperative position markers and having a detection line of sight; and a control unit arranged for receiving one or more preoperative images comprising one or more anatomical features of interest, each of the preoperative images comprising a plurality of preoperative position markers, wherein the control unit is further arranged for registering the detected plurality of intraoperative position markers with the plurality of preoperative position markers in each of the preoperative images; the projection system further comprising a movable projector having a projection line of sight and being configured for projecting an image representation of the one or more anatomical features of interest on a second body surface, the projection line of sight being substantially parallel to the detection line of sight, the projected image representation being based on the one or more preoperative images and the registered plurality of intraoperative position markers with the plurality of preoperative position markers, wherein the control unit is in communication with the first detector and projector and arranged for real-time image projection of the image representation on the second body surface by the projector independent from synchronized movement and varying detection and projection angles of the first detector and the projector during relative motion between the subject and the first detector and the projector, and wherein the projected image representation is a steady image projection.