A medical apparatus (100, 200, 300) for treating cells of a subject by selectively inducing apoptosis comprising multiple transducers (102, 224) with a vibrating surface, wherein each of the multiple transducers further comprises an applicator (118, 600) for attaching the vibrating surface to an outer surface of the subject (108, 218), wherein each of the multiple transducers is operable to vibrate at a frequency between 10 Hz and 1000 Hz, wherein the medical apparatus further comprises a controller (104, 222, 230) configured to control the vibration of each of the multiple transducers, wherein the controller is operable for causing each of the multiple transducers to vibrate for greater than a predetermined period of time for treating the cells, wherein the predetermined period of time is greater than one hour, wherein the controller is operable for controlling the vibrational phase and/or amplitude of each of the multiple transducers, wherein the controller comprises a processor, wherein the medical apparatus further comprises: - a magnetic resonance imaging system configured to measure magnetic resonance data from the subject within an imaging zone, wherein the multiple transducers are operable to be placed within the imaging zone; - a memory storing machine executable instructions (260, 262, 264) and a first pulse sequence, wherein the first pulse sequence is a motion sensitive pulse sequence, wherein execution of the instructions causes the processor to: • receive (400, 500) target data descriptive of the location of a target zone within the subject; • individually vibrate (402, 508) each of the multiple transducers using the controller; • acquire (404, 510) first magnetic resonance data during the vibration of each of the multiple transducers using the first pulse sequence; • calculate (406, 512) a vibration map for each of the multiple transducers using the first magnetic resonance data, wherein the vibration map is descriptive of the phase and shear strain value of vibrations caused by each of the multiple transducers within the subject; • calculate (408, 514) transducer control data to control the multiple transducers to cause a shear strain value of at least a first predetermined value within at least part of the target zone and less than a second predetermined value outside of the target zone using the vibration map for each of the multiple transducers; and • control (410, 516) the multiple transducers with the transducer control data using the controller. - a magnetic resonance imaging system configured to measure magnetic resonance data from the subject within an imaging zone, wherein the multiple transducers are operable to be placed within the imaging zone; - a memory storing machine executable instructions (260, 262, 264) and a first pulse sequence, wherein the first pulse sequence is a motion sensitive pulse sequence, wherein execution of the instructions causes the processor to: • receive (400, 500) target data descriptive of the location of a target zone within the subject; • individually vibrate (402, 508) each of the multiple transducers using the controller; • acquire (404, 510) first magnetic resonance data during the vibration of each of the multiple transducers using the first pulse sequence; • calculate (406, 512) a vibration map for each of the multiple transducers using the first magnetic resonance data, wherein the vibration map is descriptive of the phase and shear strain value of vibrations caused by each of the multiple transducers within the subject; • calculate (408, 514) transducer control data to control the multiple transducers to cause a shear strain value of at least a first predetermined value within at least part of the target zone and less than a second predetermined value outside of the target zone using the vibration map for each of the multiple transducers; and • control (410, 516) the multiple transducers with the transducer control data using the controller. • receive (400, 500) target data descriptive of the location of a target zone within the subject; • individually vibrate (402, 508) each of the multiple transducers using the controller; • acquire (404, 510) first magnetic resonance data during the vibration of each of the multiple transducers using the first pulse sequence; • calculate (406, 512) a vibration map for each of the multiple transducers using the first magnetic resonance data, wherein the vibration map is descriptive of the phase and shear strain value of vibrations caused by each of the multiple transducers within the subject; • calculate (408, 514) transducer control data to control the multiple transducers to cause a shear strain value of at least a first predetermined value within at least part of the target zone and less than a second predetermined value outside of the target zone using the vibration map for each of the multiple transducers; and • control (410, 516) the multiple transducers with the transducer control data using the controller.