System and method for accelerated mr imaging

A method of producing an MR M-mode image of an object with an MRI apparatus comprising:

• executing an under-sampled echo-planar excitation trajectory to excite multiple columns of the object;
• acquiring MR signals simultaneously on multiple channels from an RF receiver array comprising multiple coils, each coil coupled to a respective channel;
• and
• reconstructing an image from the acquired MR signals by separating contributions from the multiple columns by use of parallel imaging reconstruction.

An MRI apparatus comprising a pulse generator configured to generate multiple pencil excitation regions in an imaging subject by use of an under-sampled echo-planar excitation trajectory;

• and
• an image processor configured to:
• simultaneously acquire MR signals on multiple channels, the MR signals acquired from the multiple pencil excitation regions excited via the under-sampled echo-planar excitation trajectory;
• and
• separate contributions from the multiple pencil excitation regions on the simultaneously acquired MR signals by use of parallel imaging reconstruction.