Image quality management in dynamic contrast MRI

摘要

The present invention provides a magnetic resonance imaging system 100 that includes a memory 134 for storing machine executable instructions 140 and pulse sequence commands 142. The pulse sequence command is configured to control the magnetic resonance imaging system according to a DCE magnetic resonance imaging protocol. The magnetic resonance imaging system further includes a user interface 200 and a processor 130 for controlling the magnetic resonance imaging system. Execution of the machine-executable instructions causes the processor to acquire the calibration magnetic resonance data 144 more than once for the changing flip angle by controlling the magnetic resonance imaging system using the pulse sequence command ( 500) reconstruct the calibration magnetic resonance data of each acquisition into a calibration image 146 to create a set of variable flip angle images 148 (502) and calculate a T1 mapping 150 using said set of variable flip angle images. (504), at least in part using the T1 mapping, calculate a contrast agent calibration 152 for a given magnetic resonance imaging contrast agent (506), and using a calibration accuracy model, using the contrast agent calibration and / or Or calculating an estimated calibration error 154 representing the estimated error in the T1 mapping (508), where The calibration accuracy model is configured to calculate the estimated calibration error using the set of variable flip angle images and, if the estimated calibration error is outside a predetermined calibration error range, the calibration warning message 202 is generated. Display on the user interface (510).