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April 15, 2009 (Vol. 29, No. 8)

Accelerating Preclinical Imaging Workflow

Improving Image Acquisition, Reconstruction, Visualization, and Analysis

  • Inveon-Workplace

    Click Image To Enlarge +
    Figure 3. Enhanced CT scan speeds with new version of IAW

    Siemens Preclinical Solutions recently launched Inveon•Workplace, a preclinical imaging solution with features that directly enhance workflow efficiency. Inveon• Workplace includes the latest versions of IAW and IRW with significant enhancements to image acquisition, reconstruction, visualization, and analysis functionalities.

    Enhancements to the image acquisition speed in the new version of IAW were accomplished for all three modalities—PET, SPECT, and CT—which directly translates to less time required for this step of the workflow. In the case of PET, changes were implemented in the way data is transferred from the scanner to the embedded PC, which significantly reduce the loss of data packets.

    The option of multipinhole collimators in the SPECT system increases the sensitivity of the system, which allows for the acquisition of the same number of statistical data points in a shorter amount of time. Finally, the speed of anatomical resolution CT scan speed was increased by almost a factor of two as compared to the previous version of IAW (Figure 3A, standard area detector). The scan speed for medium-resolution CT scans was also improved in the new version of IAW (Figure 3B, standard area detector).

    Enhancements to image reconstruction techniques in the new version of IAW for PET, SPECT, and CT modalities results in a higher quality of reconstructed data, and thereby less time spent in assessing the image quality or repeating studies to obtain high-quality image data. Use of component-based normalization for PET scans delivers higher quality data with higher statistics in a much shorter scan time. In addition, the CT-based attenuation correction option minimizes noise in the PET image and improves quality. CT-based attenuation correction is now available as an automated workflow.

    The quality of the SPECT image data is enhanced by virtue of helical scanning capability, which leads to fewer artifacts in the reconstructed images. The axial field of view is also increased by adding more helical turns; this allows whole-body scans in a single experiment. The overall stability of high-resolution CT image reconstructions has been significantly enhanced with new version of COBRA real-time reconstruction engine.
    A number of enhancements were implemented in the loading and handling of PET and CT data, which reduces the overall time invested in image visualization and analysis steps. The latest version of IRW operates on a 64-bit processor so the software can make optimal use of the 16 gb RAM in the workstation.

    The end result is that data volumes as large as 8 gb can be handled with ease by the new version of IRW.
    Enhancements to the data-handling feature of IRW enables loading of static and dynamic PET and CT images at least two times faster than previous versions (Figure 4A). With the new version of IRW, images acquired by Inveon imaging systems can be launched directly without the need for DICOM conversion, resulting in a reduction in image load time (Figure 4B).

    Inveon•Workplace enhances the overall preclinical workflow by maximizing efficiency. Improvements in speed, quality, and performance facilitated by IAW and IRW will speed up preclinical imaging studies.

  • Click Image To Enlarge +
    Figure 4. Enchanced speed of PET and CT data loads and direct CT data launch with new version of IRW

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