README.md

---
extra_gated_prompt: Please read and agree to the [Data Usage Agreement (DUA)](https://github.com/MLI-lab/PMoC3D/blob/main/DUA.md)
  before requesting access.
extra_gated_fields:
  Name: text
  Email Address: text
  Country: country
  Institution: text
  Your job/role(e.g. Professor, Researcher, PhD Student, etc.):
    type: text
  I want to use this dataset for:
    type: select
    options:
    - Research
    - Education
    - label: Other
      value: other
  I agree to use this dataset for non-commercial use ONLY: checkbox
  I have read and agree to the Data Usage Agreement (DUA): checkbox
configs:
- config_name: default
  data_files:
  - split: raw_S1_0_kspace
    path: data/raw_S1_0_kspace-*
dataset_info:
  features:
  - name: scan_id
    dtype: string
  - name: kspace
    dtype:
      array4_d:
        shape:
        - 13
        - 222
        - 236
        - 2
        dtype: float32
  - name: mask
    dtype:
      array5_d:
        shape:
        - 1
        - 222
        - 236
        - 1
        - 1
        dtype: float32
  - name: ky_points
    dtype:
      array2_d:
        shape:
        - 1
        - 10608
        dtype: float32
  - name: kz_points
    dtype:
      array2_d:
        shape:
        - 1
        - 10608
        dtype: float32
  - name: smaps
    dtype:
      array5_d:
        shape:
        - 13
        - 222
        - 236
        - 512
        - 2
        dtype: float32
  - name: recon_method
    dtype: string
  - name: recon_volume
    dtype:
      array3_d:
        shape:
        - 222
        - 236
        - 256
        dtype: float32
  splits:
  - name: raw_S1_0_kspace
    num_bytes: 4190609792
    num_examples: 512
  download_size: 1065237327
  dataset_size: 4190609792
---
# PMoC3D: **P**aired **Mo**tion-**C**orrupted **3D** Brain MRI data
<table>
  <tr>
    <td style="padding: 0;">
      <a href="https://github.com/MLI-lab/PMoC3D">
        <img src="https://img.shields.io/badge/Code-PMoC3D-000000?style=for-the-badge&logo=github&logoColor=white" alt="GitHub" height="30" width="100">
      </a>
    </td>
  </tr>
</table>


PMoC3D, a real-world dataset consisting of **P**aired **Mo**tion-**C**orrupted **3D** brain MRI data. 
PMoC3D consists of the unprocessed undersampled measurement data of 27 motion-corrupted volumes from 8 subjects alongside corresponding motion-free reference scans. 

---

## Raw Measurements

All raw data are located under **sourcedata/**, organized by subject and scan:

- **sub-0X/**  
  - **sub-0{subject}_run-00_kspace/** — the *motion-free* reference acquisition  
    - **kspace**: Raw complex-valued k-space data (dimensions: *nCoils × nKy × nKz × nReadout*)  
    - **mask**: Binary acceleration mask applied in the two phase-encode dimensions  
    - **ky_points**, **kz_points**: Shot-by-shot sampling indices  
  - **sub-0{subject}_run-01_kspace/**, **sub-0{subject}_run-02_kspace/**, **sub-0{subject}_run-03_kspace/** — scans acquired with intentional motion  
  - **(optional) sub-0{subject}_run-04_kspace/** — scans containing involuntary motion (only for subjects 3, 5, and 8)  
  - **sub-0{subject}_smaps/**  
    - **sens_maps**: Coil sensitivity maps (dimensions: *nCoils × nx × ny × nz*)

---

## Reconstruction Results

Reconstructions for each algorithm are stored under **reconstructions/**:

- **L1_noMoCo/** — classical L1–wavelet reconstruction *without* motion correction  
- **AltOpt/** — results from the alternating-optimization method  
- **MotionTTT/** — results from the test-time-training U-Net approach  
- **stacked_unet/** — results from the end-to-end deep stacking U-Net  
- **Reference/** — L1 reconstruction of the motion-free reference scans  

Each method’s directory contains one `.pt` file per scan (`S{subject}_{scan}.pt`), representing the final 3D reconstruction volume.