Molecular Imaging Insight - May 2008 - (Page 14) ADDITIONAL RESOURCES: Read more on Siemens PET•CT by l i s a f r at t Acquired on the Biograph 16-slice PET•CT system, this image shows a male patient with rising PSA-values following treatment for prostatic cancer. The CT-image (left) does not show any suspicious findings. The FDG-PET image (center) shows two metastases. The overlaid PET/CT image (right) shows the exact location of the metastases (arrows) in the abdomen. PET/CT in Evolution PET/CT technology is fairly mature. Hybrid scanners are best known tency and familiarity for both radiologists and technical staff. In addition, Karolinska Universifor their utility in accurate staging in certain types of cancers, ty Hospital wanted to pair PET with 64-slice CT including lung, liver, breast and prostate. Yet, medicine is just as the combination delivers the benefits of both PET scanning and 64-slice CT technology. That beginning to scratch the surface of PET/CT’s potential. end-goal narrowed the field to a single vendor. The final factor, says Larsson, is the increased axial field of he newest options, such as Siemens Medical Soluview on the Siemens Biograph with TrueV. “A conventional PET tions Biograph with TrueV extended field of view scanner includes three detector rings, which create an axial field option, improve on their predecessors and open the of view of approximately 16 cm,” Larsson explains. “Biograph door to new clinical applications, improved patient with TrueV adds a fourth detector ring, which increases the axial care and increased efficiency. length to 21.5 cm. It is quite an improvement.” The system delivers benefits on multiple fronts; it is more Next generation PET/CT: Under the microscope efficient, accurate and cost-effective than other PET/CT scanKarolinska University Hospital/Institute in Stockholm, Sweden, ners. For starters, the larger field of view not only translates started the PET/CT deployment process in 2002. After securing fundinto a 30 percent increase in sensitivity, but also a reduction of ing in 2004, Prof. Stig A. Larsson, PhD, head of department of nuclear bed positions from seven to five in whole-body PET/CT scans. medicine, and his colleagues began evaluating various options. Spatial resolution is similar to other scanners, but each scan “It was difficult,” admits Larsson, “as our county hospital was entails more counts to create a more accurate image with less the first in Sweden to invest in PET/CT technology.” Ultimately, noise. In fact, the wider axial field translates into a 78 percent the Swedish pioneer selected Siemens Biograph with TrueV. The increase in count rate performance. decision boiled down to a few factors, says Larsson. The hospital “Since deploying PET/CT, some surgeons do not operate until a already owned two Siemens PET scanners (ECAT Exact and ECAT PET/CT study with 18FDG [fluorodeoxyglucose] is performed,” 31), so investing in its PET/CT sibling offered a degree of consis- T 1 Molecular Imaging Insight | May 2008 MolecularImaging.net http://www.medical.siemens.com/webapp/wcs/stores/servlet/ProductDisplay~q_catalogId~e_-11~a_catTree~e_100010,1007660,1011525,1011533,1011518~a_langId~e_-11~a_productId~e_143899~a_storeId~e_10001.htm http://MolecularImaging.net
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