Friedrich-Alexander-Universität
Friedrich-Alexander-Universität
Stanford Radiology
Conrad » Data » Heart 

Heart

Left Heart Ventricle Data sets and Calibration

    • We provide simulated dynamic and static projection images of a human heart with a contrasted left ventricle, aorta and myocardium.

       

      All binary data is stored in row-major order little-endian format. This means, e.g. a projection(u,v) is stored by z images, where each image consists of v rows and each row consists of u columns.

World Coordinate System and Projection Matrices

    • In order to perform a 3-D reconstruction using the created projection data set we need to define the world-coordinate system of our object space and the basic relationship between a point in world coordinates and a projection image.

      World Coordinate System

      The origin of our 3-D world-coordinate system is set to the C-arm iso-center, i.e. the center of rotation. The space unit is set to millimeter.

      Projection Matrices

      The geometry of the image acquisition needs to be defined. The data sets are based on a real-world C-arm calibration. The problem with real-world systems is, that the C-arm is wobbling and does not move exactly on a circular trajectory. Therefore for each projection image a projection matrix in homogenous coordinates is calibrated. The projection matrix of the i-th projection image, in the following denoted defines the perspective projection of a voxel in world coordinates and a pixel of the i-th projection image. It is given by:

      The projection matrix encodes a lot of system variables, e.g. the pixel size, rotation, etc.

      Here the 3x4 projection matrices which encode the perspective projection of a voxel in the world-coordinate system onto the i-th projection image can be downloaded:

Motion Phases

    • To each projection image a motion phase is assigned for the cardiac motion. The data is stored in text format with the i-th line corresponding to the relative heart phase of the i-th projection image.

      • Cardiac motion phases N = 381, 131 bpm: Initiates file downloaddownload
      • Cardiac motion phases N = 133,   60 bpm: Initiates file downloaddownload

Projection Data

    • We offer different kinds of projection data sets for download.

       

      Monochromatic projection data set which consists of N=381 images with a size of 1240x960 pixels each, an isotropic pixel resolution of 0.308 mm, and with a normal sinus rhythm

      • Dynamic projection data with cardiac motion

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload

      • Static projection data of different heart phases

        1. Raw projection images: Initiates file downloaddownload 30% heart phase, Initiates file downloaddownload 80% heart phase
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload 30% heart phase, Initiates file downloaddownload 80% heart phase

       

      Monochromatic  projection data set which consists of N=133 images with a size of 1240x960 pixels each, an isotropic pixel resolution of 0.308 mm, and with a normal sinus rhythm, lateral phase shift and lateral defect

      • Dynamic projection data with normal cardiac motion

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm:  Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral phase shift of 0.2

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral phase shift of 0.3

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral wall defect

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Static projection data 

        1. Raw projection images: Initiates file downloaddownload 75% heart phase
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload 75% heart phase
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic catheter projection data 

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

       

      Polychromatic projection data set which consists of N=133 images with a size of 1240x960 pixels each and with a normal sinus rhythm, lateral phase shift and lateral defect

      • Dynamic projection data with normal cardiac motion

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral phase shift of 0.2

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral phase shift of 0.3

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic projection data with lateral wall defect

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

      • Static projection data 

        1. Raw projection images: Initiates file downloaddownload 75% heart phase
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload 75% heart phase
        3. Surface meshes: Initiates file downloaddownload

      • Dynamic catheter projection data 

        1. Raw projection images: Initiates file downloaddownload
        2. Postprocessed projection images for usage with the FDK-Reconstruction algorithm: Initiates file downloaddownload
        3. Surface meshes: Initiates file downloaddownload

Contact

Data with motion defects