We have developed a variation of selective inversion recovery (SIR) angiography that allows us to obtain a collection of several angiograms within the same acquisition time previously required to obtain a single image. In basic SIR, a single readout is performed after the tagging inversion pulse. In
MR angiography by selective inversion recovery
β Scribed by Dwight G. Nishimura; Albert Macovski; John M. Pauly; Steven M. Conolly
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 502 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0740-3194
No coin nor oath required. For personal study only.
β¦ Synopsis
A modified inversion-recovery sequence is introduced which performs subtraction angiography by varying time-of-flight effects of blood flowing into an imaged slab. The selective 180" excitation inverts different regions between measurements to isolate arterial and/or venous blood. On normal human subjects, high-resolution carotid artery angiograms have been obtained.
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## Abstract We have developed an enhancement of selective inversion recovery that allows us to obtain highβresolution angiograms in reduced Scan time. By applying several read pulses following each tagging inversion pulse, we can obtain several phase encodes in each cardiac cycle, thereby reducing
In the selective inversion recovery method for projection angiography, upstream blood is tagged by an inversion excitation and then allowed to flow into the imaged region. The subtraction of this first image from a second image acquired without the tagging leaves a signal from only the selectively t
## Abstract Using a fast version of selective inversion recovery, we have obtained coronary angiograms of normal volunteers showing the proximal portions of the left coronary artery. Blood is tagged in the aortic root at end systole using a 2D inversion pulse. After a washβin time of 300β600 ms, th
We have studied a pulse sequence using compact imaging gradients for MR angiography by selective inversion recovery. By acquiring signals approaching a half-echo, we achieve significant immunity to artifacts from flow-induced dephasing. Initial clinical results on carotid arteries accurately depict