PET imaging using gamma cameras

D’Asseler, Yves; Vandenberghe, Stefaan; Winter, F De; Walle, Rik Van de; Bouwens, Luc; Lemahieu, Ignace; Dierckx, R. A.

doi:10.1016/s0895-6111(00)00058-6

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…The performance measurements were acquired with the detectors in a U‐shape configuration as suggested by the manufacturer (Matthews, 2000; D'Asseler et al ., 2001a). The radius of rotation was 25 cm.…”

Section: Methodsmentioning

confidence: 99%

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PET imaging using a triple‐head gamma camera

Kuikka

Sohlberg

Husso-Saastamoinen

2002

Clin Physio Funct Imaging

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Interest in clinical fluorodeoxyglucose (FDG) imaging with multiple-head gamma cameras is growing. To improve sensitivity, triple-head coincidence imaging has been proposed. We report our initial experiences with a triple-head coincidence gamma camera with 19 mm sodium iodide crystal thickness. Several positron emission tomography-image quality parameters were evaluated using a Carlson and line source phantom. The system sensitivity with two-dimensional axial shields was 830 cps kBq-1 ml-1 and maximum noise equivalent count rate 1900 cps for an 18F-activity of 50 MBq. The imaging resolution was in central axial 7.0 mm and in central transaxial 7.6 mm, respectively. The average scatter fraction in scattered media was 29%. Clinical brain, heart and whole body images studies with [18F]FDG were acquired and they show good correlation with the phantom image quality. As a conclusion, triple-head coincidence gamma camera provides relatively high-count rate imaging with good contrast and resolution.

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Section: Methodsmentioning

confidence: 99%

“…Manufactures have developed an increased number of low‐cost coincidence gamma cameras for functional PET imaging. Dual‐head gamma cameras are usually selected for clinical use (Jarritt & Acton, 1996; Lewellen et al ., 1999; Bocher et al ., 2000; Kunze et al ., 2000; D'Asseler et al ., 2001b).…”

Section: Introductionmentioning

confidence: 99%

PET imaging using a triple‐head gamma camera

Kuikka

Sohlberg

Husso-Saastamoinen

2002

Clin Physio Funct Imaging

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“…Multi-head gamma cameras can be outfitted with coincidence-detection electronics, providing the capability to perform both coincidence-detection positron emission tomography (PET) and collimated single-photon emission computed tomography (SPECT) (D'Asseler et al 2001, Jarritt and Acton 1996, Lewellen et al 1997, Patton and Turkington 1999. Such hybrid PET/SPECT cameras offer a flexible and low cost alternative to dedicated PET scanners, but the necessary hardware compromises limit the quality of the hybrid PET images.…”

Section: Introductionmentioning

confidence: 99%

Survey of parallel slat collimator designs for hybrid PET imaging

Rust

Kadrmas

2003

Phys. Med. Biol.

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Hybrid PET gamma cameras with coincidence detection electronics are commonly equipped with parallel slat collimators in order to reduce detection of singles and scattered photons, and create a pseudo-2D imaging geometry. The objective of this work was to survey a broad range of parallel slat collimator designs using a series of Monte Carlo simulated PET acquisitions. Collimator properties including septal height, septal thickness and pitch were independently examined over a wide range of values. Simulations were performed for hybrid PET imaging of a long cylindrical phantom uniformly filled with water and radioactivity. The performance for each collimator design was evaluated in terms of the trues-to-singles ratio, scatter fraction, and noise equivalent count rate for a wide range of camera trigger rates. Results indicate that increasing septal height offers the biggest performance gain. Septal thickness should be at least 0.5 mm, and should be optimized in conjunction with pitch to obtain the best performance. This survey provides the groundwork necessary for optimizing slat collimators, and provides a starting point for investigating new slat collimator designs.

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“…To circumvent these issues several efforts have been made to bring monolithic crystals to PET. Commercially, the main approach has been to convert dual-head [8], [9] or triple-head [10], [11] SPECT designs into dual-modality PET/SPECT imagers by adding coincidence electronics and thicker NaI(Tl) crystals. These systems have been able to produce acceptable images, but their performance has generally been considered inferior to that of dedicated PET systems.…”

Section: Introductionmentioning

confidence: 99%

A new pet system for small-animal imaging

Wilson

Furenlid

Barrett

et al.

IEEE Symposium Conference Record Nuclear Science 2004.

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We outline the design of a new small-animal PET system. This system employs modular scintillation cameras composed of nine PMTs coupled by a light guide to a monolithic NaI(Tl) scintillation crystal. The basic principles of the PET system are presented along with an overview of the electronics and position-estimation scheme. The potential advantages of this design are discussed and preliminary reconstructed images are presented.

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PET imaging using gamma cameras

Cited by 10 publications

References 23 publications

PET imaging using a triple‐head gamma camera

PET imaging using a triple‐head gamma camera

Survey of parallel slat collimator designs for hybrid PET imaging

A new pet system for small-animal imaging

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