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Table of Contents
MRI sequences used for DSC
SD-FLASH
SD-FLASH (simultaneous dual fast low angle shot) was used for monitoring two slices paralelly. Imaging described in [1] was performed using a Siemens Magnetom Vision 1.5T MR scanner. First slice was placed to monitor artery carotid and second to monitor ROI. The tissue within ROI was excited first and readout last, the artery slice was excited last readout first. The location of carotid slice was selected from a set of neighbouring slices. These dataset was obtained by a flow-sensitive SD-FLASH (TE=6 ms, FA=40°, next parameters was the same as in table below) [1].
Sequence parameters
| parameter | value | units | note |
|---|---|---|---|
| TE | 20.0 | ms | brain |
| TE | 11.6 | ms | carotid artery |
| slice thickness | 10 | mm | brain |
| slice thickness | 5 | mm | carotid artery |
| FOV | 188×250 | mm | - |
| Matrix size | 62×128 | px | - |
| FA | 13 | ° | - |
| Temporal resolution | 1,5 | s | - |
| Total duration | 90 | s | - |
| No.of acquired imeges | 2×60 | - | - |
Sources
[1] WIRESTAM, Ronnie, Linda ANDERSSON, Leif ØSTERGAARD. Assessment of Regional Cerebral Blood Flow by Dynamic Susceptibility Contrast MRI Using Different Deconvolution Techniques. Magnetic Resonance in Medicine [online]. 2000, vol. 43(issue 5), 691-700 [cit. 2012-02-08]. Available on: http://onlinelibrary.wiley.com/doi/10.1002/%28SICI%291522-2594%28200005%2943:5%3C691::AID-MRM11%3E3.0.CO;2-B/full
[2] Köstler H, Becker H. The value of gating and flow compensation for measurements of the arterial input function in dynamic susceptibility contrast MRI. MAGMA 1996;4(Suppl.):68.
single-shot gradientecho-planar imaging
Performed with: Siemens Magnetom Vision 1.5T
| parameter | value | units | note |
|---|---|---|---|
| TE | 66 | ms | |
| TR | 1000 | ms | |
| slice thickness | 5 | mm | carotid artery |
| FOV | 230×230 | mm | - |
| Matrix size | 128×128 | px | - |
| FA | 90 | ° | - |
[3]IBARAKI, Masanobu, Hiroshi ITO, Eku SHIMOSEGAWA, Hideto TOYOSHIMA, Keiichi ISHIGAME, Kazuhiro TAKAHASHI, Iwao KANNO a Shuichi MIURA. Cerebral vascular mean transit time in healthy humans: a comparative study with PET and dynamic susceptibility contrast-enhanced MRI. Journal of Cerebral Blood Flow [online]. 2006-05-17, roč. 27(č. 2), 404-413 [cit. 2012-02-08]. DOI: 10.1038/sj.jcbfm.9600337. Dostupné z: http://www.nature.com/doifinder/10.1038/sj.jcbfm.9600337