Dear Arjama,

Thanks a lot for your reply and for your very detailed example. The problem I was referring to is in the line where you add TIMAM to the mask.
If I run:
inputs = [TIMAM]
field_masking_filter = analysis.core.FieldMaskingFilter(inputs=inputs)

where TIMAM = modulation_envelope(e_field_1, e_field_2, dir_vector=None)

I get the error:
field_masking_filter = analysis.core.FieldMaskingFilter(inputs=[TImax])
File "C:\Program Files\Sim4Life_8.0.0.15165\Python\lib\site-packages\s4l_v1_api\analysiswrappers.py", line 231, in init
self.Inputs[id].Connect(input)
File "C:\Program Files\Sim4Life_8.0.0.15165\Python\lib\site-packages\s4l_v1_api\analysiswrappers.py", line 647, in Connect
raise Exception("Can't connect ports")
Exception: Can't connect ports

So I think my problem is the creation of TIMAM. I Imagine it is not the TI envelope, but rather the TI Envelope inside some data structure that can be connected to the masking filter?

Thanks again!

Hi,
You could do it with the optimizer/scripting.
Option (1)
For 2 electrode pairs you can create LF multiport simulation (see LF tutorial). In the post-pro you will update the Amp/Phase of the electrodes and use the simulation combiner to extract the TI MAM.
Once you run the simulation once, select the simulation and click on optimize. Switch to the Analysis tab to check if this pipeline is created, click on switch to Expert Mode. Now to include design variables which in your case is the position of the electrode switch to “Model” tab and click on the electrodes, in the controller select “Show Expression” and “Create Expression” . Then switch to Analysis tab and create a pipeline that will look like the following:

Sim4Life_szrHUU8P6P.png

Option (2)
If you are required to do this, please let me know, I can send you an example script to create a similar pipeline.

If you require further help with creating either of these, please email s4l-support@zmt.swiss.

Thanks,
Arjama

@halder Hi Arjama, thanks for your reply! I will send you an email!

It depends on what you mean by transmitting and receiving. If the port outputs of the antenna look like 50 ohms in both transmit and receive then the usual multiport simulation will work just fine. Then you just need to go into each port, say "port extract" then go to overall field, then extract that ports E field. This E field will be what is generated from exciting port n and "receiving" on all other antenna. Do this 8 times for all 8 ports and this should be what you want

Wow I can't believe I missed that. Thank you so much! The warning definitely threw me off

Note that the above is only true in the case of a harmonic signal, which is why Sim4Life does not provide the RMS by default. It is up to the user to calculate the RMS based on their knowledge of the signal.

If you are interested in B1+/B1-, the rotational components of B1 are by definition constant in time and so their RMS magnitudes are equal to their absolute magnitudes.

When you used the Mask Filter, did you check the option 'Invalidate Masked Values'? This will set the Background to NaN, which should hide it. Otherwise, the Background value will be changed to a user-defined replacement value, which would still show up during visualization.

@halder Thank you for your response. I want the total current of 1 mA flowing between my two electrodes. In this case, I should put the target value as (1 mA/area of the plane I have drawn between two electrodes)?
since my plane area is 182mm*220mm, then I should select the target value to be 0.024975 A/m2. Is this the correct approach?

Really sorry, I honestly don't understand - I don't know what you mean with modulation and I'm not sure what you mean with using matlab and what input file you are exactly referring to. Maybe some screenshots will help, otherwise maybe contact support

Hi,
There is a file size limit with the MATLAB exporter but it will be improved. In the mean time, you might

use a smaller field sensor than the overall field and try to limit the size of the field of view to the volume of interest only
or export to Cache instead of MATLAB. This is an HDF5 file. You can use multiple libraries and functions in MATLAB to import an HDF5 file. This format can handle very large data files.

Hi,

Currently, there is no tool in Sim4Life allowing you to extract the S-parameter in time domain. You might evaluate it via Python scripting (using already available time-domain data of voltage and current at ports or inverse Fourier Transform). Sim4Life team is informed to include this request in the development plan and will inform you in the future once it is implemented.

I've solved the issue. The sweep works if I set the source for the QS solver to a coil (wire current settings) instead of linking in that data from the SV solver (vector potential settings).

Hi Vasilis,

The Hyperthermia Optimizer and Template are licensed products that are not part of the Sim4Life light student version.

Best,
Habib

Hi Gia,

There is no tool that computes the scalar product for the J-fields from two sensors/simulation. However, you can try to access the fields from Python and compute the product yourself.

You can extract the J-field in the UI, and then right-click the lowers algorithm in your Analysis tree and select ToPython. This will help you with writing a script to extract certain quantities.

Best,
Habib

J(x,y,z,f0) is the volume current density:

081c7de2-7f8f-4450-8e4c-bd69ad8a8ec7-image.png

So integrating it's flux across a surface, one gets A/m^2 m^2, which simplifies as A. The unit shown in the table viewer unfortunately does not do the simplification...