Siemens adds HD to PET/CT
Siemens Medical Solutions unveiled the first high definition PET/CT system at SNM 2007 this week in Washington, D.C.

"The clarity of HD/PET will provide greater specificity and accuracy and will enable physicians to more confidently delineate small lesions – including those in lymph nodes, abdomen, head and neck, and brain- to provide earlier, more targeted treatment," said Michael Reitermann, president, Molecular Imaging, Siemens Medical Solutions.

The clarity achieved by HD-PET is the result of proprietary technology that optimizes the elements of image uniformity, resolution and contrast. "The uniform resolution provided by HD-PET throughout the field-of-view is a significant step in improving PET image quality," said David Townsend, PhD, director, Molecular Imaging and Translational Research Program, University of Tennessee Graduate School of Medicine, who has worked with Siemens while testing the new HD-PET technology. "Historically with PET imaging, intrinsic image quality has been known to degrade with increasing distance from the center of the scanner. HD-PET eliminates this effect thus providing increased diagnostic confidence to more accurately resolve peripheral lesions. This, in turn, could potentially improve staging of disease and hence clinical outcome."

By using a proprietary reconstruction technique, HD-PET can provide distortion-free images throughout the entire field of view. This improved 2 mm resolution enables physicians to clearly visualize the smallest of lesions from the center to the edges. That should result in better treatment and post-surgery/post-radiation monitoring.

In terms of detection, HD-PET will improve the delineation of small abdominal lesions as well as small retroperitoneal lymph node metastases including testicular tumors, and cervical and uterine malignancies. HD-PET provides improved visualization of small lesions that would otherwise be difficult to image. HD-PET can also improve the accuracy of radiotherapy planning because it offers superior detection of the true extent of the lesion.