Roland Felix

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UNLABELLED Differential diagnosis of pancreatic lesions still remains a problem. Whereas CT provides high spatial resolution, PET detects malignant lesions with high sensitivity. The objective of this study was to evaluate the clinical benefit of PET/CT image fusion in the diagnostic workup of pancreatic cancer. METHODS One hundred four patients with(More)
PURPOSE To prospectively assess accuracy of magnetic resonance (MR) imaging, MR cholangiopancreatography (MRCP), and MR angiography in patients suspected of having pancreatic tumors. MATERIALS AND METHODS Sixty-six patients suspected of having pancreatic tumors underwent MR imaging (unenhanced and contrast material-enhanced MR, MRCP, and contrast-enhanced(More)
Alterations in presynaptic and postsynaptic dopaminergic system and cerebral glucose metabolism in corticobasal degeneration (CBD) were assessed to evaluate the potential usefulness of different imaging methods for CBD. (123)I-FP-CIT/(123)I-beta-CIT SPECT and (123)I-IBZM SPECT as well as (18)F-FDG PET were performed in eight CBD patients. Decreased(More)
OBJECTIVES To examine whether in computed tomography (CT) soft tissue and bone tissue can be simultaneously presented with a combined window without loss of diagnostic information compared to the separate presentations with soft tissue and bone tissue windows. MATERIALS AND METHODS Forty-seven CT examinations from different patients with pathological(More)
Blood platelets are thought to be a useful peripheral model for investigating the central serotoninergic mechanisms associated with the serotonin transporter (SERT). On the other hand, an in vivo investigation of SERT in the human brain has been made possible by the development of several promising SPECT radioligands, such as [123I]-ADAM. The aim of the(More)
A magnetic resonance (MR)-compatible three-dimensional (3-D) hyperthermia applicator was developed and evaluated in the magnetic resonance (MR) tomograph Siemens MAGNETOM Symphony 1.5 T. Radiating elements of this applicator are 12 so-called water coated antenna (WACOA) modules, which are designed as specially shaped and adjustable dipole structures in(More)
As inversion-recovery (IR) technique improves T1 contrast at high field strength, signal enhancement by T1-shortening contrast media may be affected. To clarify the different enhancement properties at 3.0 T, the authors compared T1-weighted sequences. Twelve contrast-enhancing lesions were investigated by spin-echo (SE), inversion recovery fast spin-echo(More)
1Einleitung Die quantitative Analyse der Passage und des Anreicherungsverhaltens von Kon-trastmittel (KM) nach Bolusinjektion und dynamischer Bildgebung bleibt, sowohl bei der Computertomographie (CT) wie auch üblicherweise bei der Magnetresonanzto-mographie (MR), auf eine einzige-zweidimensionale-Bildebene beschränkt [1-6]. Weitere Limitierungen ergeben(More)