The ECAT ART Scanner for Positron Emission Tomography. 1. Improvements in Performance Characteristics.

PET Facility, Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA
Clinical Positron Imaging 02/1999; 2(1):5-15. DOI: 10.1016/S1095-0397(98)00057-0
Source: PubMed


The widespread use of positron emission tomography (PET) has been to some extent limited by the cost and complexity of PET instrumentation. Recognition of the wider applicability of clinical PET imaging is reflected in the ECAT ART design, a low cost PET scanner targeted for clinical applications, particularly in oncology. The ART comprises two asymmetrically opposed arrays of BGO block detectors. Each array consists of 88 (transaxial) by 24 (axial) crystals, and the arrays rotate continuously at 30 rpm to acquire a full 3D projection data set. Sensitivity and count rate limitations are key performance parameters for any imaging device. This paper reports on improved performance characteristics of the ART, achieved by operating the scanner with a decreased block integration time, reduced coincidence time window, and collimated singles transmission sources. Compared to the standard ART configuration, these modifications result in both improved count rate performance and higher quality transmission scans.

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    ABSTRACT: The ECAT ART is a low-cost positron emission tomography (PET) scanner design for which increasing interest in the use of PET, and specifically (18)FDG PET for oncological studies, has stimulated a demand. Although targeted primarily for the clinical market, the performance of the ART scanner can also meet the demands of a research environment where, in addition to [(18)F], more challenging, shorter-lived isotopes such as [(11)C], [(13)N] and [(15)O] are used. The ART has been used successfully to perform quantitative (18)FDG studies, blood flow measurements with [(15)O]water, and brain mapping studies with [(15)O]water (activation). In the clinical arena, it has been used for a wide range of applications, including epilepsy, whole-body imaging in oncology, and for cardiac viability studies. This paper explores the capability of the ECAT ART scanner to meet the demands of PET studies in both a research and clinical arena.
    Clinical Positron Imaging 02/1999; 2(1):17-30. DOI:10.1016/S1095-0397(98)00056-9
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