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Inversion and saturation prepulses were used to suppress stationary tissue and enhance intravascular signal. Presaturation slabs were applied where certain vascular structures had to be suppressed. Sequence parameters were optimized by evaluating signal intensity and contrast characteristics for various flip angles and inversion and saturation delay times. The heart and intrathoracic vasculature were encompassed with 40\u201350 overlapping sections. Both 2D angiograms and maximum\u2010intensity\u2010projection images were evaluated. Combining data sets acquired in the sagittal and transverse orientations provided the most satisfactory information about the pulmonary arteries. The highest signal\u2010to\u2010noise ratios were obtained with a flip angle of 65\u00b0 and short prepulse delay times. Two\u2010dimensional MR angiography can provide useful diagnostic information but requires a thorough understanding of in\u2010plane and hemodynamically induced signal intensity changes.<\/jats:p>","DOI":"10.1002\/jmri.1880040109","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T03:05:41Z","timestamp":1173150341000},"page":"29-36","source":"Crossref","is-referenced-by-count":7,"title":["MR angiography of congenital heart disease: Value of segmented two\u2010dimensional inflow technique and maximum\u2010intensity\u2010projection display"],"prefix":"10.1002","volume":"4","author":[{"given":"Klaus C.","family":"Seelos","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexander 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