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RSSNon-Contrast Lower Limb MR Angiography Using NATIVE SPACE
November 18, 2009
•Case Study: Non-Contrast Lower Limb MR Angiography Using NATIVE SPACE
By Siemens Industry
A 55-year-old male presented with right leg calf claudication with the onset of pain occurring after walking 50 meters. He had a normal femoral pulse but an absent popliteal pulse on the right and normal pulses on the left. The patient was imaged on a 1.5T Siemens MAGNETOM Avanto using the 8-channel, 16 element Peripheral Angio Matrix coil, combined with the Body and Spine Matrix coils. Standard contrast enhanced MR angiography was followed by the non-contrast NATIVE SPACE sequence at the femoro-popliteal station for comparison.
Sequence details
The SPACE acquisition is a high spatial
resolution 3D TSE sequence offering the
use of non-selective refocusing pulses
and, thus, short echo spacings. The
NATIVE SPACE technique relies on the
inherent difference in signal between
fast flowing blood during systole and
the slower flowing blood during diastole
to generate contrast. Two data sets
were acquired after determining the
trigger times from a "NATIVE scout
mode" acquired from an artery within
the imaging volume and subtracted.
ECG cardiac gating was used.
•Case Study: Non-Contrast Lower Limb MR Angiography Using NATIVE SPACE
