Cardiac MRI has been recognized as the gold standard for quantification of the left ventricular volumes, mass and functions. However, these were shown by studies conducted within a single center. Manual contours vary between centers due to different training protocols. This study aims to bring a consensus ground truth data for myocardial contours derived from multiple centers worldwide.
Seven independent expert readers, representing seven experienced CMR core labs, have analyzed fifteen CMR studies according to their own standard operating protocols, using their preferred tools and following the SCMR guidelines for post-processing of cardiac MRI. The data set consists of mixed normal and patients with heart failure, myocardial infarction and hypertrophy. Images were acquired by different MR modalities and from different sites.
|Pathology||5 healthy volunteers|
|6 myocardial infarction|
|2 heart failure|
|Images||short-axes cine, long-axes cine MRI|
|Vendor||GE (8), SIEMENS (5), PHILIPS (2)|
You can also assess your contours !
... whether you are training a new reader or developing your segmentation algorithm ...
Complete and submit the form below. Your request will be reviewed by the data contributors.
Start contouring only at ED and ES frames according to the SCMR guideline using any tools you like.
Submit your contours to us for assessment.
We will send you back the report of your contours validated against the consensus.
We prefer a generic text format that contains floating-point numbers of contour points in the image coordinate. However, we are able to read contours from major cardiac MRI analysis tools, such as QMass (Medis, the Netherlands), CMR42 (Circle Cardiovascular Imaging Inc., Canada) and OSIRIX (Pixmeo SARL, Switzerland).
If you develop a software or using other software for contouring and would like us to recognise your contour format, then please contact us.
PatientID: SCP0001001 Frame: 1 Image: IM-0001-0201.dcm Contour: endo Points: 21 138.750000 128.250000 138.750000 128.500000 138.750000 128.750000 . . Contour: epi Points: 18 115.500000 108.000000 115.750000 107.750000 . .
We will send technical and clinical validation of your contours against the consensus. Technical validation includes contour-based distance measurements, the Dice indices, plots of disagreement areas, and volume differences. Clinical validation includes Bland-Altman plots on end-diastolic volumes, end-systolic volumes, mass, ejection fractions, and reader biases compared with the seven readers.
Note that we do not share the consensus contour points to you in order to keep the objectivity of this assessment.