The invention provides for a magnetic resonance imaging system (100) comprising: a magnet (104) for generating a main magnetic field with a homogeneous field zone (108)； an antenna (124, 900, 1000) with an imaging zone (126) that has a fixed geometric relationship with portion (119) of a subject (118)； a radio frequency system (114, 116, 124) for generating a radio frequency pulse (602)； a magnetic gradient field system (110, 112)； and a patient support (120, 122) for automatically moving the antenna and the portion of the subject from outside of the homogeneous field zone to within the homogeneous field zone along a movement axis. Machine executable instructions (180, 182, 184, 186, 188) cause a processor (136) controlling the magnetic resonance imaging system to: move the antenna and the portion from outside of the homogeneous field zone to within the homogeneous field zone along the movement axis； control (402) the radio frequency system to repeatedly generate a radio frequency pulse； control (404) the magnetic gradient field system to generate a gradient magnetic field during movement of the subject support only along the movement axis； control (406) the radio frequency system to repeatedly measure the radio frequency signal from the portion of the subject using the antenna； determine (408) a current location (128) of the antenna or of the imaging zone using the radio frequency signal； and control (410) the patient support to decelerate and halt at a predetermined location (109) within the homogeneous field zone using the current location.L'invention concerne un système d'imagerie par résonance magnétique (100) comprenant : un aimant (104) pour générer un champ magnétique principal avec une zone de champ homogène (108) ； une antenne (124, 900, 1000) avec une zone d'imagerie (126) qui a une relation géométrique fixe avec une partie (119) d'un sujet (118) ； un système de radiofréquence (114, 116, 124) pour générer une impulsion de radiofréquence (602) ； un système
