Evaluation of a high resolution ring detector positron camera system

Eriksson, Lars; Widén, L.; Bergström, Mats; Bohm, C.; Floom, G.; Greitz, T.; Hovander, B.; Litton, J.

doi:10.1016/0047-0740(78)90169-9

Cited by 5 publications

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“…The wobble mode required the center of the tomograph to be moved to four specific locations around the circumference of a circle 1 in. in diameter, a design developed by Eriksson 31 at the Karolinska Hospital in Stockholm, Sweden. A complete emission data set was acquired at each wobble position, thereby sampling different lines of response throughout the field-of-view.…”

Section: Instrumentation For Tomographic Imaging Of Positron Emissionmentioning

confidence: 99%

“…119 Historically, the only PET scanners developed specifically for cardiology appeared around the mid-1980s, the POSICAM scanner from Positron Corporation 120 in 1985 that used barium fluoride crystals and the ECAT III, 32 which had a similar, three detector rings with five image planes arrangement as in the earlier NEUROECAT. 31 The subsequent block design, whole-body scanners met the needs of cardiology. Prior to the introduction of the LSO scintillator, 3-D PET scanning of the heart using BGO scintillators was challenging due to the high out-of-field photon flux that resulted in high dead time and random coincidence rates.…”

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confidence: 99%

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History and future technical innovation in positron emission tomography

2017

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Abstract. Instrumentation for positron emission tomography (PET) imaging has experienced tremendous improvements in performance over the past 60 years since it was first conceived as a medical imaging modality. Spatial resolution has improved by a factor of 10 and sensitivity by a factor of 40 from the early designs in the 1970s to the high-performance scanners of today. Multimodality configurations have emerged that combine PET with computed tomography (CT) and, more recently, with MR. Whole-body scans for clinical purposes can now be acquired in under 10 min on a state-of-the-art PET/CT. This paper will review the history of these technical developments over 40 years and summarize the important clinical research and healthcare applications that have been made possible by these technical advances. Some perspectives for the future of this technology will also be presented that promise to bring about new applications of this imaging modality in clinical research and healthcare.

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Section: Instrumentation For Tomographic Imaging Of Positron Emissionmentioning

confidence: 99%

mentioning

confidence: 99%

History and future technical innovation in positron emission tomography

2017

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“…Early positron-emission scanners were based on the detection of annihilation photons first with discrete detectors [1,2] then planar arrays of detectors [3]. Building upon this early work, contemporary PET scanners consist of rings of rectangular detector modules [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Perhaps the most important downside to this design is the necessity to utilize large amounts of scintillator and photo-sensitive devices resulting in high capital costs, especially as the price of the new generation of scintillators (LSO and LYSO), continue to increase.…”

Section: Introductionmentioning

confidence: 99%

Construction and evaluation of a large radiation detector for Positron Emission Tomography applications

Raylman,

Stolin,

Jaliparthi

et al. 2024

J. Inst.

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Large arrays of pixelated scintillator potentially have application in economical construction of PET scanners. In this investigation, we constructed and evaluated a detector with an active area of 32.26 × 13.47 cm2. It is based on a 218 × 91 array of 1.4 × 1.4 × 15 mm3 LYSO elements (pitch 1.48 mm). Scintillation light is detected with a 5 × 12 array of silicon photomultipliers (SiPM) arrays. Each array consists of an 8 × 8 array of 3 × 3 mm2 (pitch 3.35 mm) SiPMs. Performance of these devices are enhanced and stabilized by cooling them. Testing revealed that the detector was able to detect 90% of the theoretically detectable 511 keV photons. The resolvability index (a measure of the ability to identify individual detector elements from background) is 0.24 ± 0.04. Additionally, the average energy resolution for the complete detector is 18.3%. These results compare well with those reported for much smaller detector modules.

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Positome II: A High Efficiency Positron Imaging Device for Dynamic Brain Studies

Thompson¹,

Yamamoto²,

Meyer

1979

IEEE Trans. Nucl. Sci.

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The performance of a new positron imaging device designed for high resolution dynamic studies on the human brain is described. This unit is the first to exploit the high photoelectric efficiency of bismuth germanate (BGO) detectors which are almost 3 times as dense as Nal. In the first 4 months of clinical use some 300 patient studies have been performed. The detector performance and design criteria are discussed. The principles of operation of the coincidence circuit and computer programs are described. Finally some clinical studies are presented to demonstrate its imaging capabilities.

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Evaluation of a high resolution ring detector positron camera system

Cited by 5 publications

References 0 publications

History and future technical innovation in positron emission tomography

History and future technical innovation in positron emission tomography

Construction and evaluation of a large radiation detector for Positron Emission Tomography applications

Positome II: A High Efficiency Positron Imaging Device for Dynamic Brain Studies

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