PET-camera

The combination of a PET camera and small cyclotron faciUty provides ready access to the abiUty to image the in vivo distribution of an enormous variety of molecules. The importance of this technique to research is substantial. [Pg.476]

Positron emission, 21 298-299 Positron emission tomography (PET) cameras, 21 211. See also PET scanning... [Pg.750]

Surti S, Karp J (2004) Imaging characteristics of a 3-dimensional GSO whole-body PET camera. J Nucl Med 45 1040-1049... [Pg.596]

The current generation of commercial available PET-cameras, developed for applications in the nuclear medicine, consists of 20-30 detector rings with 600-800 detectors per ring. The ring diameter is 80-90 cm and the field of view (range for image reconstruction) is 55 cm in radial and 15 cm in transaxial (= horizontal) direction. [Pg.22]

These PET-cameras can also be used for transport studies in soil columns. But they were developed for the special demands of nuclear medical diagnostics. The algorithm for the image reconstruction and the error corrections are specialized for these applications. [Pg.22]

Dimension and arrangement of the detectors are not optimal for investigations of soil columns. Therefore, a special PET-camera for geoscientific studies is in development (Richter et al., 2000A). [Pg.22]

A spatial resolution of 3 mm can be realized when the measurement is done with a sufficient small step width. The measuring time is significant longer compared to the comercial PET-cameras (several hours). The flow rate for soil column experiments is often low in relation to the natural condition, so that measming times of several hours are acceptable. [Pg.22]

At the moment small PET-cameras (microPET) will be developed at several research centers. They use small detector crystals which are arranged in rings with diameters of 20-25 cm (Chatziioannou et al., 1999 ). In future such devices could also be used for transport studies in geological layers. [Pg.22]

Positron Emisssion Tomography 3-8 mm low tracer concentration, which not influences the geochemical regime measurement of spatial velocity by steady state flow possible flow detection also in single small pores (0 < 0.5 mm) special radioactive tracer necessary, commercial PET-cameras only for medical applications available... [Pg.23]

The flow distribution in a model soil column (length 1 m, diameter 10 cm) with defined disturbing inserts (Fig. 2.1) was studied to demonstrate the feasibility of PET-studies. The measurements were carried out with a commercial PET-camera (Siemens ECAT EXACT HR (3D)). Kaliumfluoride, marked with the positron emitting isotope F-18 (half life time 110 min), was applied as hydrodynamic tracer. Fluorides of two-valent cations are only slightly soluble. The radio tracer would be absorbed in the col-... [Pg.24]

PET imaging is performed with positron emitting radiopharmaceuticals. After collision of the emitted positrons with electrons, pairs of gamma-rays are formed that are detected by the PET camera. The most important PET tracer is F-Fludeoxyglucose ( F-FDG) with a physical half-life of 110 min. F-FDG is nowadays synthesised by nucleophilic substitution of the precursor mannose triflate using fully automated synthesis procedures and cyclotron-produced F-fluoride ions. After purification the resulting... [Pg.312]

Table 2.2 Summary of Characteristics of a Several Complete Small Animal PET Cameras... [Pg.49]

The ideal characteristics of a SPECT or PET camera are given in Table 2.3. Key factors include spatial resolution, sensitivity, image contrast, counting rate ability, and scatter fraction. Issues related to spatial resolution and instmment sensitivity have already been discussed, but resolution and sensitivity by themselves do not suffice to fully characterize these imaging systems or to fully compare the different models. In clinical SPECT and PET imaging, the National... [Pg.50]

Figure 2.4 Commercially available small animal PET cameras (a) microPET-P4 from Concorde microSystems, (b) MOSAIC from Phillips Medical System, (c) Qnad-HIDAC from Oxford Positron Systems, (d) ARGUS by SUINSA, and (e) YAP-PET from the University of Eerrarra, sold by COMECER. (Courtesy of Robert Nutt, Concorde MicroSystems, Dr. Joel Karp, University of Pennsylvania, Dr. Alan Jeavons, Oxford Positron System, SUINSA, and COMECER.)...

Surti S, Karp JS, Perkins AE, Freifelder R, Muehllehner G. Design evaluation of A-PET a high sensitivity animal PET camera. IEEE Med Imaging Conf 2002. [Pg.57]

Jeavons AP, Chandler RA, Dettmar CAR. A 3D HIDAC-PET camera with sub-miUimeter resolution for imaging small animals. IEEE Trans Nucl Sci 1999 46 468-473. [Pg.57]

Germanium-68 Accelerator Generates gallium-68, a standard for testing PET cameras... [Pg.242]

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