CBV-fMRI with VASO is highly dependent on a good inversion contrast. It gives it its CBV sensitivity and is also responsible for most of the VASO specific pitfalls (e.g. inflow, CSF etc. ). And thus, it should be optimized as much as possible.
In this blog post, I want to describe the most important features of a reliable inversion pulse for the application of VASO at 7T with a head transmit coil.
Continue reading “TR-FOCI pulse optimisations for SS-SI VASO”
ISIS-conv is a very useful dicom to nii converter from Enrico Reimer. ISIS-conv gets along with a lot of challenging data sets that no other converter (that I know of) can handle so conveniently:
- SMS-data, where individual slices have a non-constant inter-slice distances.
- VASO data with non-constant TRs
- Multi-echo, multi-coil, and Magnitude/Phase data.
There is a Mac-installation package of ISIS-conv. Unfortunately, however, with every IOS update, it has become more complicated to install it.
Since, I spend too much time figuring out how to install it after every update, I am collecting the necessary steps in this Blog post for future reference:
Continue reading “Installing ISIS-conv on MAC”
In this blog post, I want to describe the application and working principle of a few spatial smoothing algorithms that are implemented in LAYNII.
- Confined smoothing along similar anatomical structures with
- Smoothing along the layers with
- Smoothing within columns with
- Smoothing across specific spatial dimensions only with
- Smoothing long the time domain with
Continue reading “Anatomically informed spatial smoothing”
The following is a list of my favorite layer-fMRI abstracts at SFN in San Diego.
Continue reading “Layer-fMRI abstracts at SFN 2018 in San Diego”
In this Blog post, I seek to describe a quick example of how to analyze high-resolution data across layers and columns with LAYNII.
Continue reading “Quick example of cortical unfolding in LAYNII”
In the last years, I and multiple other VASO users have encountered many occasions of voxels that show negative CBV change (positive VASO signal change) while the BOLD suggests that the activation should be positive. In this blog post, I want to list potential sources of this surprising effect.
Continue reading “Negative Voxels in VASO”
In this blog-post I want to describe a setup, how you can include an additional ICE functor in your reconstruction pipeline that sends raw Twix files from the Reconstruction computer to any given custom server. Continue reading “How send raw k-space data to any given server with Twix or with a modified ICE-chain”