An imaging system comprising: an x-ray assembly aimed at an imaging region of a patient, the x-ray assembly configured to be energizable to emit ionizing radiation from one or multiple predetermined different spatial positions toward the imaging region; control hardware (110, 110') to energize the x-ray assembly at predetermined times each at one or more of the spatial positions; and a digital x-ray detector (420; 950) in digital communication with the imaging system, wherein the detector (420; 950) is configured to capture a radiographic image of the imaging region of the patient in response to energizing the x-ray assembly, wherein a first mode of operation comprises energizing the x-ray assembly at multiple predetermined times from only one spatial position toward the imaging region of the patient, a second mode of operation comprises energizing the x-ray assembly at multiple predetermined times each from a different predetermined one of the spatial positions, wherein the control hardware (110, 110') comprises stored control program instructions operable to switch the imaging system between the first and second modes in response to an event occurring in the imaging region of the patient during one medical image examination; wherein the event occurring in the imaging region of the patient is automatically detectable by the imaging system in the radiographic image of the imaging region, and wherein the event occurring in the imaging region of the patient is automatically detected by the imaging system operating in the first mode; wherein the control program switches an operating mode of the imaging system from the first mode to the second mode in response to the imaging system automatically detecting the event occurring in the imaging region of the patient; wherein the event occurring in the imaging region of the patient occurs in a body cavity or fluid vessel of the patient, and/or wherein the event occurring in the imaging region of the patient comprises a radio opaque object or a radiographically detectible fluid moving through the body cavity or fluid vessel of the patient. an x-ray assembly aimed at an imaging region of a patient, the x-ray assembly configured to be energizable to emit ionizing radiation from one or multiple predetermined different spatial positions toward the imaging region; control hardware (110, 110') to energize the x-ray assembly at predetermined times each at one or more of the spatial positions; and a digital x-ray detector (420; 950) in digital communication with the imaging system, wherein the detector (420; 950) is configured to capture a radiographic image of the imaging region of the patient in response to energizing the x-ray assembly, wherein a first mode of operation comprises energizing the x-ray assembly at multiple predetermined times from only one spatial position toward the imaging region of the patient, a second mode of operation comprises energizing the x-ray assembly at multiple predetermined times each from a different predetermined one of the spatial positions, wherein the control hardware (110, 110') comprises stored control program instructions operable to switch the imaging system between the first and second modes in response to an event occurring in the imaging region of the patient during one medical image examination; wherein the event occurring in the imaging region of the patient is automatically detectable by the imaging system in the radiographic image of the imaging region, and wherein the event occurring in the imaging region of the patient is automatically detected by the imaging system operating in the first mode; wherein the control program switches an operating mode of the imaging system from the first mode to the second mode in response to the imaging system automatically detecting the event occurring in the imaging region of the patient; wherein the event occurring in the imaging region of the patient occurs in a body cavity or fluid vessel of the patient, and/or wherein the event occurring in the imaging region of the patient comprises a radio opaque object or a radiographically detectible fluid moving through the body cavity or fluid vessel of the patient.