2000
DOI: 10.1148/radiology.215.2.r00ma21584
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Three-dimensional Contrast-enhanced MR Angiography with Real-time Fluoroscopic Triggering: Design Specifications and Technical Reliability in 330 Patient Studies

Abstract: Technical reliability was determined for triggering three-dimensional (3D) contrast material-enhanced magnetic resonance (MR) angiography with MR fluoroscopy. Technical requirements for high reliability were also identified. Reliability was evaluated in 330 consecutive patient studies of the neck, thorax, abdomen, and pelvis. Contrast material arrival was detected fluoroscopically in 325 of the 330 studies (98.5%), and the 3D sequence was successfully triggered in 321 of 330 studies (97.3%). Fluoroscopic trigg… Show more

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Cited by 119 publications
(52 citation statements)
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“…However, there was no consistent trend that A exp was higher for one group vs. the other. Some statistical spread of rSNR exp and A exp values, as shown in Table 2, is expected, as has been observed in intersubject tabulations of contrast bolus arrival times in CE-MRA (31).…”
Section: Discussionsupporting
confidence: 68%
“…However, there was no consistent trend that A exp was higher for one group vs. the other. Some statistical spread of rSNR exp and A exp values, as shown in Table 2, is expected, as has been observed in intersubject tabulations of contrast bolus arrival times in CE-MRA (31).…”
Section: Discussionsupporting
confidence: 68%
“…Using the proper scan delay and acquiring the low-spatial-frequency (high contrast) lines of k-space during peak arterial enhancement are critical for minimizing venous contamination and preventing scanning before sufficient contrast reaches the aorta. The arterial phase may be optimized with the use of fluoroscopic triggering (1), an automated bolus detection technique (2), a timing run (3), or a "best-guess" method. With improved gradient strength, pulse sequences, and parallel imaging methods, a "time-resolved" approach can also be used, which will obviate the need for a timing strategy (4).…”
Section: Techniquementioning
confidence: 99%
“…Several methods are used to determine the optimal delay between the start of intravenous contrast material injection and the start of image acquisition, including injection of a test bolus using a small amount of contrast material, automatic triggering, and MR fluoroscopy (Sakamoto, 2010;Hany, 1997;Foo, 1997;Riederer, 2000). More recently, all major MRI system vendors have introduced real-time bolus monitoring software packages and these are now considered the state-of-the art for CE-MRA.…”
Section: Introductionmentioning
confidence: 99%