slow ecalib

[jiaen-liu]

I use ecalib to get the sensitivity maps with one slice of 128 channels in the command below. It takes very long. Is there a way to speed up the process? Thanks! [calib emaps] = bart('ecalib -r 10', data); % data is 1x64x48x128

[aTrotier]

Hi Channels number is suppose to be on the third dimensions (readout, phase encoding, partition encoding, channels)

You should permute the dimensions, I suppose you have 48 channels

Aurelien

Le mer. 21 juin 2023 à 18:55, jiaen-liu @.***> a écrit :

I use ecalib to get the sensitivity maps with one slice of 128 channels in the command below. It takes very long. Is there a way to speed up the process? Thanks! [calib emaps] = bart('ecalib -r 10', data); % data is 1x64x48x128

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[aTrotier]

My bad, on dim 4. You can check the dimensions expected here : https://github.com/mrirecon/bart/blob/master/src/misc/mri.h

Le mer. 21 juin 2023 à 19:04, Aurélien @.***> a écrit :

Hi Channels number is suppose to be on the third dimensions (readout, phase encoding, partition encoding, channels)

You should permute the dimensions, I suppose you have 48 channels

Aurelien

Le mer. 21 juin 2023 à 18:55, jiaen-liu @.***> a écrit :

I use ecalib to get the sensitivity maps with one slice of 128 channels in the command below. It takes very long. Is there a way to speed up the process? Thanks! [calib emaps] = bart('ecalib -r 10', data); % data is 1x64x48x128

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[jiaen-liu]

I followed the example in the bart tutorial where the first dimension is 1. I think that should be fine. It works as if there is only one slice. There are 128 channels in my case.

On Wed, Jun 21, 2023 at 12:05 PM aTrotier @.***> wrote:

Hi Channels number is suppose to be on the third dimensions (readout, phase encoding, partition encoding, channels)

You should permute the dimensions, I suppose you have 48 channels

Aurelien

Le mer. 21 juin 2023 à 18:55, jiaen-liu @.***> a écrit :

I use ecalib to get the sensitivity maps with one slice of 128 channels in the command below. It takes very long. Is there a way to speed up the process? Thanks! [calib emaps] = bart('ecalib -r 10', data); % data is 1x64x48x128

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[aTrotier]

Try reducing the number of coil With coil compression

Le sam. 24 juin 2023 à 00:21, jiaen-liu @.***> a écrit :

I followed the example in the bart tutorial where the first dimension is 1. I think that should be fine. It works as if there is only one slice. There are 128 channels in my case.

On Wed, Jun 21, 2023 at 12:05 PM aTrotier @.***> wrote:

Hi Channels number is suppose to be on the third dimensions (readout, phase encoding, partition encoding, channels)

You should permute the dimensions, I suppose you have 48 channels

Aurelien

Le mer. 21 juin 2023 à 18:55, jiaen-liu @.***> a écrit :

I use ecalib to get the sensitivity maps with one slice of 128 channels in the command below. It takes very long. Is there a way to speed up the process? Thanks! [calib emaps] = bart('ecalib -r 10', data); % data is 1x64x48x128

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[uecker]

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