Gold standard for the evaluation of the lower extremity arteries: DSA Excellent alternative imaging tool: MRA with Gadolinium-based contrast agents Recognition of Nephrogenic Systemic Fibrosis (NSF) a few years ago: patients with renal failure should be evaluated more strictly as Gadolinium plays a triggering role for the development of NSF  Non-contrast-enhanced imaging techniques became focus of research,
mostly based on T2-weighted (w) TSE or ECG-gated SSFP examinations [2,3]...
Methods and Materials
Study population: 8 healthy volunteers MR scanner and coil system: Magnetom 7 T (Siemens,
Germany) Custom-built 16-channel transmit/receive coil  (Fig.
1) Manual positionable AngioSURF table for multistation imaging (Fig.2) TIAMO (Time-interleaved acquisition of modes)  Sequence parameters: T1w 2D FLASH T1w TurboFLASH Repetition time TR [ms] 14 700 Echo time TE [ms] 5.26 3.84 Flip angle FA [°] 80 80 Bandwidth [Hz/pixel] 1300 930 Slice orientation transversal transversal Slices...
T1w FLASH imaging at 7 Tesla provided a hyperintense artery signal in the iliac,
and lower leg artery segments without application of contrast agent. The large arterial vasculature of the pelvis and lower extremity as well as small pedal and intramuscular arteries could be delineated nicely (Fig.
3). Qualitative analysis showed a superiority for the TurboFLASH sequence for all analyzed artery segments despite the iliacal one with good to excellent image quality (Fig.
Our study shows the feasibility of non-contrast-enhanced MRA of the lower extremity at a ultra-high field strength of 7 Tesla. This is the first presentation of data over such a large portion of the body in one examination at 7 T. The results of this study show the superiority of T1w TurboFLASH imaging regarding image quality and the presence of artifacts.
PCG-gating was essential for a continuous homogenous artery signal. Non-enhanced MRA of the lower extremity at 7 T can be considered to be...
 Grobner et al.
Gadolinium and nephrogenic systemic fibrosis.
2007;72:260-264.  Lanzman et al.
Non-enhanced 3D MR angiography of the lower extremity using ECG-gated TSE imaging with non-selective refocusing pulses-initial experience.
2010;182:861-867.  Hodnett et al.
Evaluation of peripheral arterial disease with non-enhanced quiescent-interval single-shot MR angiography.
2011;260:282-293.  Mönninghoff et al.
Evaluation of intracranial aneurysms with 7...