This "readme - Jaeger et al 2022 Phys Med Biol.txt" file was generated on 2024-04-03 by 
Michael Jaeger, Institute of Applied Physics, University of Bern 

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GENERAL INFORMATION
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1. Title of dataset: "Raw data used in Jaeger et al. 2022 Phys Med Biol 67" 

2. Short description: 
Echo ultrasound raw data used in the paper: 
"Pulse-echo speed-of-sound imaging using convex probes" Jaeger et al. 2022, Phys Med Biol 67, 215016-1--17, doi: 10.1088/1361-6560/ac96c6 

3. Contributor information: 
Michael Jaeger, first author and data creator: code development, phantom building, data acquisition, data analysis, manuscript writing, and data curation 
Patrick Stähli: scientific discussions and manuscript editing 
Naiara Korta Martiartu: scientific discussions and manuscript editing 
Parisa Salemi Yolgunlu: scientific discussions 
Thomas Frappart, Christophe Fraschini (Supersonic Imaginge): support in using the Mach30 system. 
Martin Frenz: scientific discussions and grant holder 
 
For questions, contact: 
Michael Jaeger, group leader 
Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland 
michael.jaeger@unibe.ch 

4. Date of data collection: 
2021-06-14 to 2021-08-10 

5. Geographic location of data collection:  
Bern, Switzerland 

6. Keywords:  
ultrasound tomography, multiparametric ultrasound, sound velocity imaging, liver imaging, liver steatosis, diagnostic ultrasound

7. Information about funding sources that supported the collection of the data:  
Funding agency: Swiss National Science Foundation 
Grant number: 205320_178038 

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SHARING/ACCESS INFORMATION 
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1. Licenses/restrictions placed on the data: 
Attribution NonCommercial-NoDerivs CC BY-NC-SA

2. Links to publications that cite or use the data: 
DOI 10.1088/1361-6560/ac96c6 
https://iopscience.iop.org/article/10.1088/1361-6560/ac96c6/pdf

3. Was data derived from another source? No 

4. Recommended citation for this dataset: 
Michael Jaeger, Patrick Stähli, Naiara Korta Martiartu, Parisa Salemi Yolgunlu, Thomas Frappart, Christophe Fraschini, Martin Frenz "Raw data used in Jaeger et al. 2022 Phys Med Biol 67" 2024, BORIS, https://doi.org/10.48620/395 

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DATA & FILE OVERVIEW  
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1. File list: 

Calibration data: 
calibration_1.raw.mat 
calibration_2.raw.mat 
calibration_3.raw.mat 
calibration_4.raw.mat 
calibration_5.raw.mat 
calibration_6.raw.mat 
calibration_7.raw.mat 
calibration_8.raw.mat 

Phantom data: 
phantom_horizontal.raw.mat
phantom_tilted.raw.mat 

Liver data: 
liver.raw.mat

2. Relationship between files: 
none 

3. Are there multiple versions of the dataset? no 

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METHODOLOGICAL INFORMATION  
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1. Description of methods used for collection/generation of data: 
The data were acquired using a SUPERSONIC® Mach® 30 clinical ultrasound system with a C6-1X convex probe, both provided by Hologic®—Supersonic Imagine®, Aix en Provence, France. 

The data were acquired using a L7-4 linear vascular probe (ATL Philips, WA, USA), 
connected to a Vantage 64 LE (Verasonics Inc., WA, USA) research ultrasound system. 

For details, see: 
"Pulse-echo speed-of-sound imaging using convex probes" Jaeger et al. 2022, Phys Med Biol 67, 215016-1--17, doi: 10.1088/1361-6560/ac96c6 

2. Methods for processing the data 
For ease of use, the raw data was converted to a self-explaining format. 
Each .mat file contains two variables: 
"metadata" a structure with fields describing important parameters for the interpreation of the data 
"rawdata" a matrix containing the signal values, where dimensions correspond to (time, element index, acquisition angle) 

3. Instrument- or software-specific information needed to interpret the data: 
Information needed for interpretation are found in the "metadata" variable 

4. Standards and calibration information: 
No standards or calibration were used for producing the data. When processing the data, however, note that calibration data is available (see above) for calibrating the desired results. 

5. Quality-assurance procedures: 
None 

6. People involved with sample collection, processing, analysis, curation: 
Michael Jaeger 

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DATA-SPECIFIC INFORMATION  
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Calibration and phantom data were acquired from phantoms made of gelatine, agar, and cellulose. For further detail read the article. The reference SoS values were: 

Phantom: (from top to bottom) 1490 m/s, 1570  m/s, 1490 m/s, 1555 m/s 

Calibration phantom: 1540 m/s