A novel compact gamma camera based on flat panel PMT

Pani, R.; Pellegrini, R.; Cinti, M.N.; Trotta, Carlo; Trotta, G.; Scafè, R.; Betti, M.; Cusanno, F.; Montani, L.; Iurlaro, G.; Garibaldi, F.; Guerra, A. Del

doi:10.1016/s0168-9002(03)02132-6

Cited by 28 publications

(9 citation statements)

References 4 publications

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“…Yujin studying by several research groups [1][2][3]. However, the large number readout channels of an array of H8500 tubes results in a significant increase of the complexity of the readout electronics.…”

Section: Introductionmentioning

confidence: 99%

Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

Zhang

et al. 2010

IEEE Nuclear Science Symposuim &Amp; Medical Imaging Conference

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The aim of this study was to develop a highperformance simplified readout electronic for a compact gamma camera to achieve a maximized performance in its intrinsic spatial resolution. This compact camera is based on a pixellated NaI(Tl) crystal with 1.2mmx1.2mmx5 mm pixel element and 1.4 mm pixel pitch coupled to a 2x2 Hamamatsu H8500 multi-anode position sensitive photomultiplier tube (PSPMT) array. The design of the simplified readout is based on novel two-stage charge divisions with Truncated Center-of-Gravity (TCOG) positioning method to maximize the detector performance. The performance of the compact camera with the novel simplified readout was evaluated by flood imaging of a 57 Co source. The experimental results show that the readout circuits we developed can effectively reduce the readout channels from 256 to 4 and well resolve the 1.2mm crystal elements of the NaI(Tl) crystal array while maximizing the effective field-of-view (FOV) of the detector to cover the whole active area of the detector. In addition, the optical coupling measures in the gap regions among the PSPMT array are necessary in order to improve the image distortion in the gap regions. The results indicate that our design is effective approach which can be adopted for other highresolution gamma camera based on multi-anode PSPMT array with a larger FOV.

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Section: Introductionmentioning

confidence: 99%

Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

Zhang

et al. 2010

IEEE Nuclear Science Symposuim &Amp; Medical Imaging Conference

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“…N nuclear medicine, many small field, high-resolution Ȗ-Camera systems based on PSPMTs, have been recently developed [1][2][3]. Their advantages over commercial Ȗ-Camera systems (better spatial resolution, lower cost, light weight) justify their demand for imaging either small human body organs or small animals.…”

Section: Introductionmentioning

confidence: 99%

An analytical position correction algorithm for γ-Camera planar images from resistive chain readouts

Thanasas

Georgiou

Giokaris

et al. 2009

2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)

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The charge limitation for peripheral Field Of View (FOV) events detected by the most commonly used Position Sensitive Photomultiplier Tubes (PSPMTs) results to spatial distortions and non-uniformities of the obtained planar images. These effects can be corrected with newly developed sophisticated techniques operating on the charge signals from the individual wires of the multi-anode systems. However, a similar algorithmic approach for the simple case, where the resistive chain readout technique is used and, consequently, the original charge distribution information is lost, is not applicable. In this work the development of a new method to eliminate these distortion effects in the planar images for Ȗ-Camera systems based on resistive chain techniques is presented. The proposed model, which incorporates an a priori knowledge of three parameters related to light diffusion inside the scintillation crystal in use, provides an accurate, analytically calculated estimate of the spatial correction as a function of the primary reconstructed planar position from the resistive chain signals. This algorithm can be used online on an event-by-event basis and can be applied to both, homogeneous and pixelated crystals.

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“…N recent years there have been many efforts to develop highresolution compact gamma cameras for nuclear medicine and animal research applications [1][2][3][4][5][6]. In terms of size, cost effectiveness and performance, the use of a pixellated scintillator crystal array coupled to a position sensitive photomultiplier tube (PSPMT) still remains the best choice for high-resolution compact gamma cameras.…”

Section: Introductionmentioning

confidence: 99%

Performance comparison of subtractive resistive readout with conventional resistive readout for a high-resolution compact gamma camera

Zhang

Zhao

et al. 2007

2007 IEEE Nuclear Science Symposium Conference Record

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A novel compact gamma camera based on flat panel PMT

Cited by 28 publications

References 4 publications

Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

An analytical position correction algorithm for γ-Camera planar images from resistive chain readouts

Performance comparison of subtractive resistive readout with conventional resistive readout for a high-resolution compact gamma camera

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A novel compact gamma camera based on flat panel PMT

Cited by 28 publications

References 4 publications

Development of a simplified readout for a compact gamma camera based on 2&#x00D7;2 H8500 multi-anode PSPMT array

Development of a simplified readout for a compact gamma camera based on 2&#x00D7;2 H8500 multi-anode PSPMT array

An analytical position correction algorithm for &#x03B3;-Camera planar images from resistive chain readouts

Performance comparison of subtractive resistive readout with conventional resistive readout for a high-resolution compact gamma camera

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Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

Development of a simplified readout for a compact gamma camera based on 2×2 H8500 multi-anode PSPMT array

An analytical position correction algorithm for γ-Camera planar images from resistive chain readouts