Method for performing an angiographic measurement and creating an angiogram

A magnetic-resonance system for performing an angiographic measurement and creating an angiogram of a body region of a patient in a magnetic-resonance system, the body region being relatively larger than a maximum field of view of the magnetic-resonance system and the magnetic-resonance system including a control unit for controlling performance of the angiographic measurement and creation of the angiogram, the magnetic-resonance system comprising:

• a planning unit embodied to:
• acquire an anatomical size of the patient and an upper limit and a lower limit of the body region;
• divide the angiographic measurement into partial angiographic measurements and thereby dividing the body region into a plurality of partial measuring ranges to be measured in succession, each partial measuring range of the plurality of partial measuring ranges being respectively assigned to a different respective partial measuring range of the body region and each respective partial measuring range being relatively no larger than a maximum field of view and being assigned to a respective partial angiographic measurement, and each of the partial angiographic measurements being assigned measuring time points, including at least a measurement start time and a measurement end time, so that an overall measurement duration of the angiographic measurement is defined by a respective measurement start time of a first respective partial angiographic measurement of the partial angiographic measurements and a respective measurement end time of a last respective partial angiographic measurement of the partial angiographic measurements, and
• automatically define sequence parameters of the partial angiographic measurements based on changed measurement time points such that the partial angiographic measurement is performable between an associated measurement start time and measurement end time,
• provide the sequence parameters of a control unit,
• display the respective measurement start time, the respective measurement duration and a respective measurement end time of the respective partial angiographic measurements on a graphical user interface, and
• change the measuring time points, wherein, when a respective measuring time point of a respective partial angiographic measurement is changed, adaptation of at least one further measuring time point of another partial angiographic measurement is performed automatically,
• the control unit embodied to control the magnetic-resonance system and a measuring unit based on the sequence parameters provided;
• and
• the measuring unit to perform the partial angiographic measurements and create the angiogram using the partial angiographic measurements performed, wherein contrast medium dynamics are acquired on at least one station of the body region via a test bolus measurement with an injected test bolus before dividing of the angiographic measurement in partial angiographic measurements, and wherein at least one of
• the contrast medium dynamics and the respective measurement start times the respective measurement duration and the respective measurement end times of the respective partial angiographic measurements are depicted superimposed on the graphical user interface, and
• the contrast medium dynamics on the dividing of the angiographic measurement into partial angiographic measurements are used in that a partial angiographic measurement with a first contrast medium velocity derived from the contrast medium dynamics is assigned a shorter measurement duration than a partial angiographic measurement with a second, relatively slower, contrast medium velocity derived from the contrast medium dynamics.

A magnetic-resonance system, comprising:

• a memory storing program computer-readable instructions;
• and
• one or more processors configured to execute the program computer-readable instructions such that the one or more processors are configured to,
• acquire an anatomical size of a patient and an upper limit and a lower limit of a body region of the patient;
• divide an angiographic measurement into partial angiographic measurements, the one or more processors being configured to divide the body region into a plurality of partial measuring ranges to be measured in succession, each partial measuring range of the plurality of partial measuring ranges being assigned to different body regions, no larger than a maximum field of view, and assigned to a respective partial angiographic measurement of the partial angiographic measurements, each of the partial angiographic measurements being assigned respective measuring time points, including at least a respective measurement start time and a respective measurement end time, so that an overall measurement duration of the angiographic measurement is defined by the respective measurement start time of a first partial angiographic measurement of the partial angiographic measurements and the respective measurement end time of a last partial angiographic measurement of the partial angiographic measurements;
• display the respective measurement start time, the respective measurement duration and the respective measurement end time of the respective partial angiographic measurements on a graphical user interface;
• change measuring time points, wherein a change in a respective measuring time point of a respective partial angiographic measurement causes an automatic adaptation of at least one further measuring time point of another partial angiographic measurement;
• automatically define sequence parameters of the partial angiographic measurements based on the changed measurement time points such that the partial angiographic measurement is performable between an associated measurement start time and measurement end time;
• provision the sequence parameters of the one or more processors of the magnetic-resonance system;
• perform the partial angiographic measurements;
• and
• create an angiogram using the partial angiographic measurements performed, wherein contrast medium dynamics are acquired on at least one station of the body region via a test bolus measurement with an injected test bolus before dividing of the angiographic measurement in partial angiographic measurements, and wherein at least one of
• the contrast medium dynamics and the respective measurement start times, the respective measurement duration and the respective measurement end times of the respective partial angiographic measurements are depicted superimposed on the graphical user interface, and
• the contrast medium dynamics on the dividing of the angiographic measurement into partial angiographic measurements are used in that a partial angiographic measurement with a first contrast medium velocity derived from the contrast medium dynamics is assigned a shorter measurement duration than a partial angiographic measurement with a second, relatively slower, contrast medium velocity derived from the contrast medium dynamics.