Time-resolved phase-contrast MR imaging with speed encoding

US9804242B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jana Hutter · Effeltrich, DE
• Peter Schmitt · Erlangen, DE

Key dates

• Filing date: Mar 21, 2014
• Grant date: Oct 31, 2017
• Expiry date: Sep 1, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5611
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method and apparatus for time-resolved phase-contrast magnetic resonance (MR) imaging with speed encoding, MR signals are detected with multiple receivers in each of numerous time segments in order to acquire raw data in each of the time segments, in each case for numerous MR images with different speed encodings. Stationary image points and/or non-stationary image points are identified, dependent on the detected MR signals. A mask is defined, dependent on the identified stationary image points and/or the non-stationary image points, wherein the mask is locally variable. The numerous MR images for the numerous time segments are reconstructed from the acquired raw data, wherein the reconstruction occurs in an iterative process and with a temporal regularization, which is dependent on the mask.