Patient Preparation

As with all CE MRA techniques, an intravenous line should be placed in the arm before the patient enters the magnet. Breath holding is especially important for aortic imaging and significantly improves image quality; however,it may not be possible in every case. Supplemental oxygen andhyper-ventilation can also help improve breath-holding. Breath-holding needs to be incorporated between thestart of contrast agent injection and the start of contrast-enhancedimaging. It isacceptable to use a body coil because it provides a large field of view with homogenous signal, however, a torso or body phased-array coil is recommended for use with parallel imaging sequences. Typically, an antero-posterior phased-array surface coil (torso array coil) is used for signal reception. The coil is placed around the patient to cover the vasculature from the proximal abdominal aorta to the level of the inguinal ligaments, including the renal and pelvic c

Fig. 3a-c. The true FISP image (a) acquired before contrast agent injection already demonstrates aneurysm formation and thrombosis (asterisk) in the infrarenal abdominal aorta. On the corresponding whole volume MIP image (b) of a 3D CE MRA dataset (Gd-BOPTA, 0.1 mmol/kg) extensive dilatation of the infrarenal aorta (arrows) and accessory renal arteries on both sides can be observed. The accessory renal arteries are even better displayed on a targeted MIP reformation (c) on which the accessory renal arteries are clearly identified (arrows = renal arteries, arrowheads = accessory renal arteries)

Fig. 3a-c. The true FISP image (a) acquired before contrast agent injection already demonstrates aneurysm formation and thrombosis (asterisk) in the infrarenal abdominal aorta. On the corresponding whole volume MIP image (b) of a 3D CE MRA dataset (Gd-BOPTA, 0.1 mmol/kg) extensive dilatation of the infrarenal aorta (arrows) and accessory renal arteries on both sides can be observed. The accessory renal arteries are even better displayed on a targeted MIP reformation (c) on which the accessory renal arteries are clearly identified (arrows = renal arteries, arrowheads = accessory renal arteries)

arteries. The arms of the patient should be placed either above the head or folded across the chest to avoid folding artefacts.

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