Reducing oblique flow effects in interleaved EPI with a centric reordering technique

AbstractSegmented interleaved echo planar imaging offers a fast and efficient approach to magnetic resonance angiography. Unfortunately, this technique is particularly sensitive to oblique flow in the imaging plane. In this work, a mathematical analysis of oblique flow effects for several types of k‐space coverage is presented. The conventional linear acquisition scheme, an alternating centric and a nonalternating centric encoding scheme are compared with respect to their flow properties. It is shown both by simulations and imaging experiments that artifacts from oblique in‐plane flow are effectively reduced by both centric reordered phase‐encoding schemes. The nonalternating centric acquisition scheme is preferred to the alternating centric scheme due to the smoother phase error transition in k‐space in the presence of obliquely‐angled flow. Magn Reson Med 45:623–629, 2001. © 2001 Wiley‐Liss, Inc.

Reducing oblique flow effects in interleaved EPI with a centric reordering technique Journal Articles