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Earlier Results

To illustrate the power of the edge averaging and AC warping algorithms, we present imaging results from 6 groups of patients:

  1. All 167 Patients
  2. Females
  3. Males
  4. Patients with Prominent Breasts
  5. Patients with Thin Chest Walls
  6. Patients with Thick Chest Walls

  1. All Patients

    This is the same AC data as the average warped AC above, but with the template edges overlaying the AC images. The template edges were derived from an the average of all 167 patients. The cross in the center of the slices marks the position of the average of the body geometric centers.

    We also used the average edges to make a 3D model of the lungs and body of our average patient.

    The model can be manipulated interactively using the free geomview software package developed by the Geometry Center at the University of Minnesota. The LV shape, and position for the model were taken from our 50 patient Rb-82 resting normal file. The pseudocolor intensities of the LV surface were taken from our 50 patient Tl-201 SPECT male stress normal file.

  2. Females

    This shows the average edges from the female patients overlaying the average AC images that were warped to these edges.

  3. Males

    This shows the average edges from the male patients overlaying the average AC images that were warped to these edges.

  4. Patients with Prominent Breasts

    This shows the average edges from 5 patients with prominent breasts overlaying the average, warped AC images from these patients. The patients were chosen by sorting all patients with respect to a ratio of the body radii at 60 and 120 degrees to their average body radius. The five top scores were selected and averaged together.

  5. Patients with Thin Chest Walls

    This shows the average edges from 5 patients with thin chest walls overlaying the average, warped AC images from these patients. The patients were chosen by sorting all patients with respect to the average distance between their outer lung edges and their body edges. The five lowest scores were selected and averaged together. The average chest wall thickness of these patients is about 2 cm.

  6. Patients with Thick Chest Walls

    This shows the average edges from 5 patients with thick chest walls overlaying the average, warped AC images from these patients. The patients were chosen by sorting all patients with respect to the average distance between their outer lung edges and their body edges. The five top scores were selected and averaged together. The average chest wall thickness of these patients is about 10 cm.

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Statistical Results

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Last updated 6/20/95