Method for generating angiographic magnetic resonance images

摘要

A method of generating a sequence having a predetermined first number of temporally successive angiographic magnetic resonance images of an examination area, the method comprising the steps of: - defining a sequence having a predetermined second number (N) of tilt angles (α), the first tilt angle (α) at the beginning of the sequence is less than the last tilt angle (α) at the end of the sequence, and wherein an arbitrary tilt angle (α) is substantially greater than or equal to the consecutive tilt angle (α), - determining first magnetic resonance data (A) by detecting a predetermined third number (NA) of first sub-segments of a k-space belonging to the first magnetic resonance data (A), each first sub-segment being detected over a respective first time interval and a sequence having the second number (N) of components (A ), each component (A) being detected according to a gradient echo method with a tilt angle (α) which is present at a position (i) corresponding to the component (A) as a consequence of the tilt angle, wherein at the beginning of the first time intervals a fluid flowing into the examination area has a first predetermined spin mark, - determining second magnetic resonance data (B) Detecting a predetermined fourth number (NB) of second sub-segments of a k-space belonging to the second magnetic resonance data (B), each second sub-segment being detected over a respective second time interval and a sequence having the second number (N) of components (B) wherein each component (B) is detected according to a gradient echo method with a tilt angle (α) present at a position (i) corresponding to component (B) in the sequence of tilt angles, at the beginning of the second time intervals one into the examination region inflowing liquid a different from the first spin mark second predetermined spin Markie determining contiguous tilt angle index ranges for each angiographic magnetic resonance image, and generating the sequence of temporally successive angiographic magnetic resonance images of the examination region by respectively generating a portion of the first magnetic resonance data (A) and a portion of the second magnetic resonance data (B) to produce one of the angiographic magnetic resonance images ), wherein the proportion of the first magnetic resonance data (A) comprises components of the first sub-segments, which were detected with tilt angles of the tilt angle index range for the respective angiographic magnetic resonance image, and wherein the proportion of the second magnetic resonance data (B) comprises components of the second sub-segments, which were detected with tilt angles of the tilt angle index range for the respective angiographic magnetic resonance image.