GM-PETRA
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If you have not visited this page since Dec 26, 2025, you will need to reset your password. Your username is the email address that you used to sign the MTA license agreement.
Please be aware that while Siemens C2P agreements are for the specific scanner+institution, the MTA agreement to download sequences on this site are for an individual. If your institution needs to change or add additional authorized people to download sequences, each person will need to sign the MTA agreement and then CMRR will create an account on this site.
The CMRR GM-PETRA Package contains the pulse sequence and online ICE image reconstruction binaries of the Pointwise Encoding Time reduction with Radial Acquisition technique with Gradient Modulation (GM-PETRA). This package is now available for use at other institutions on compatible Siemens scanners by C2P agreement with CMRR and Siemens.
The GM-PETRA package contains the following sequences:
- Gradient-Modulated PETRA
The above sequence includes the following options, which can be enabled and disabled on a per-protocol basis by the user:
- Gradient modulation after hard pulse excitation in PETRA.
- Oversampling of Single Point Imaging (SPI) acquisition around the k-space center.
- Off-center FOV (version 2.0.0 or later)
The current GM-PETRA package supports only the Siemens software version VE11C. The other software versions will be supported in future.
License
Obtaining a license
The available supported software versions are listed below. If you are interested in obtaining these sequences, please follow this process to obtain a CMRR license:
- Obtain authorization from your Siemens Regional Collaboration Manager for the specific software you would like to license.
- Contact your Siemens Regional Collaboration Manager for authorization. Please ask them to use the following text in the agreement: "developed by Dr. Naoharu Kobayashi and colleagues (“DEVELOPER”), employees of the University of Minnesota." If you are experiencing any delays working with your Siemens Regional Collaboration Manager please contact Colin Giambrone (colin.giambrone@siemens-healthineers.com).
- Send the completed authorization form to Naoharu Kobayashi
- Select the license from the OTC website and complete the license agreement.
- CMRR will send you your account information and instructions for downloading the software.
Please note that the entire licensing process may take up to two weeks to process.
Once you have executed a C2P agreement and have been given an access password, the sequence binaries can be downloaded here by selecting the desired release number.
Note: The C2P agreement in step 1 applies to the institution (scanner), whereas the MTA agreement in step 2 applies to an individual. If someone else at your institution has historically been the download contact for sequences and you would also like download access, please sign the MTA agreement and CMRR will create a download account for you.
Citation
The GM-PETRA package was developed by Naoharu Kobayashi described in the paper1 and provided by the University of Minnesota under a C2P agreement.
In addition, please cite the references associated with the sequence above.
Kobayashi N, et al. Gradient-Modulated PETRA MRI. Tomography. 2015; 1:85-90. doi: 10.18383/j.tom.2015.00157
Contact
If you have noticed a bug or have a request for a new feature in a future release, please contact Naoharu Kobayashi. Be sure to include the sequence variant and the model of scanner you are using in the problem description.
Download
References
- Kobayashi N, et al. Gradient-Modulated PETRA MRI. Tomography. 2015; 1:85-90. doi: 10.18383/j.tom.2015.00157
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