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Parallel HRRT Deconvolution

Description

The high-resolution research tomograph (HRRT) is a dedicated human brain PET scanner. Unfortunately, clear, high-resolution images are almost never obtained from this scanner. During the acquisition time of 20 - 30 minutes for a typical brain scan, patients frequently move, thus corrupting the image. When imaging a rigid object, such as the brain, these movements may be tracked and recorded with fairly high precision. Here we assume that the motion information was recorded by Polaris VICRA from NDI. This motion information may be then used in the deconvolution process to reconstruct a better, sharper image. Parallel HRRT Deconvolution is an ImageJ plugin for motion correction of PET brain images.

References

Features

Benchmark

Testbed

  • 2 x Quad-Core Intel Xeon E5472 (3GHz, 12MB L2 Cache)
  • 32 GB RAM
  • Ubuntu 8.10 (64-bit)
  • Sun Java 1.6.0_10 (64-Bit Server VM)
  • ImageJ 1.42l

Settings

  • Blurred size: 147 x 180 x 180 (real patient data)
  • Automatic segmentation
  • Data series: AVG
  • Quaternions weight: 50
  • Sampling rate: 20
  • Scan duration: 5700
  • Time offset: 150
  • Auto segment size
  • Interpolation: Nearest Neighbor
  • Output: Same as source
  • Precision: Single
Method 1 thread 2 threads 4 threads 8 threads
MRNSD (10 iterations)
21.57
17.17
15.56
14.86
MRNSD (50 iterations)
47.55
35.59
30.96
30.06
HyBR (10 iterations)
23.86
19.96
17.61
17.13
HyBR (50 iterations)*
29.95
24.70
23.18
21.25

Average execution time (in seconds).

* HyBR stopped after 14 iterations (min of GCV curve within window of 4 iterations).

Example

Input data After 15 iterations of MRNSD

Documentation

To install the plugin, just download the binary distribution, unpack the archive into the plugin directory and restart ImageJ. The plugin will appear under Plugins » Parallel HRRT Deconvolution menu.

License

Parallel HRRT Deconvolution is released under the GNU General Public License, except for Parallel Colt.

Download

The source code distribution, besides Ant build file, contains also Eclipse project files. To build the source code you need to download Parallel Colt or use the jar files from binary distribution of Parallel HRRT Deconvolution.

version 1.6 (September 19, 2013) Changelog

binary:

doc:

source:

Donations

If you have found this software useful and would like to thank the author, you can make a donation to show your appreciation.

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