A phase contrast (PC) rephase/dephase sequence of magnetic resonance angiography (MRA): a new technique for imaging distal run-off in the pre-operative evaluation of peripheral vascular disease

Clinical Radiology
L JonesK P Murphy

Abstract

To prospectively compare a 3-D phase contrast (PC) magnetic resonance angiography (MRA) sequence (rephase/dephase) with digital subtraction angiography (DSA) in pre-operative evaluation for femoropopliteal grafting in peripheral vascular disease. Assessment of distal run-off vessels and suggested siting of distal graft anastomosis to the above or below knee segment of the popliteal artery was made. Twenty-two lower extremities booked for infra-inguinal vascular reconstruction were imaged pre-operatively using MRA and DSA. A PC rephase/dephase sequence which includes gradient motion refocusing (Siemens 1.0 T Magnetom Impact TR 50 ms, TE 14/14 ms and 15 degree flip angle) and 3-D MIP algorithm reconstruction was used to obtain the MR images. Standard techniques were used to obtain the DSA images, and the mean and median time between imaging modalities was one month. Blinded review by a consultant vascular radiologist scored nine vessel segments for each limb and assessed which popliteal arterial segment would be most suitable for distal anastomosis. The score from DSA and MRA agreed for 155/198 vessel segments (kappa 0.57) and the suggested siting for distal anastomosis agreed for 19/22 limbs (kappa 0.72). Eighteen limbs had surg...Continue Reading

References

Jan 1, 1992·Radiology·J R Waugh, N Sacharias
Nov 1, 1995·Clinical Radiology·V G McDermottM D Schnall
Oct 1, 1993·RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin·R VosshenrichE Grabbe

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Citations

Jan 9, 2009·Cardiovascular and Interventional Radiology·Raghuram LakshminarayanDuncan F Ettles
Sep 21, 2017·General Thoracic and Cardiovascular Surgery·Keiichi ItataniHitoshi Yaku

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