A method and system for determining a pose of a subject. The subject is placed onto a surface of a platform having a first radio-frequency transceiver and a second radio-frequency transceiver. A first radio-frequency transponder is placed onto an upper extremity of the subject. A second radio-frequency transponder is placed onto a lower extremity of the subject. A first signal is transmitted from the first transceiver to the first transponder, resulting in the first transponder sending a second signal. A third signal is transmitted from the second transceiver to the second transponder, resulting in the second transponder sending a fourth signal. The second signal is received by the first transceiver. The fourth signal is received by the second transceiver. A pose of the subject is determined based on receiving the second signal and the fourth signal.