# IEEE Transactions on Nuclear Science

## Volume 55 Issue 3  Part 1 • June 2008

This issue contains several parts.Go to:  Part 2  | Part 3

## Filter Results

Displaying Results 1 - 25 of 32
• ### [Front cover]

Publication Year: 2008, Page(s): C1
| PDF (70 KB)
• ### IEEE Transactions on Nuclear Science publication information

Publication Year: 2008, Page(s): C2
| PDF (39 KB)

Publication Year: 2008, Page(s):825 - 826
| PDF (90 KB)
• ### Design and Characterization of the I-ImaS Multi-Element X-Ray Detector System

Publication Year: 2008, Page(s):827 - 832
Cited by:  Papers (1)
| | PDF (1072 KB) | HTML

I-ImaS (Intelligent Imaging Sensors) is a European project aiming to produce new, intelligent X-ray imaging systems using novel APS sensors to create optimal diagnostic images. Initial systems have been constructed for medical imaging; specifically mammography and dental encephalography. However, the I-ImaS system concept could be applied to all areas of X-ray imaging, including homeland security ... View full abstract»

• ### Physical Performance of an Intraoperative Beta Probe Dedicated to Glioma Radioguided Surgery

Publication Year: 2008, Page(s):833 - 841
Cited by:  Papers (9)
| | PDF (1019 KB) | HTML

The precise delineation and excision of brain tumor extent allows to improve survival outcome and quality of life of surgically treated patients. In order to refine the resection of gliomas, we are developing a novel intraoperative probe specifically dedicated to the localization of residual tumor after the bulk has been excised. The probe, built around clear and plastic scintillating fibers, was ... View full abstract»

• ### Signal to Noise Ratio of APD-Based Monolithic Scintillator Detectors for High Resolution PET

Publication Year: 2008, Page(s):842 - 852
Cited by:  Papers (15)
| | PDF (377 KB) | HTML

Monolithic scintillator detectors, consisting of several cm3 of scintillating material coupled to one or more Hamamatsu S8550 avalanche photodiode (APD) arrays, are proposed as detectors for high resolution positron emission tomography (PET). In this work, the factors contributing to the variance on the signals are investigated, and their effects on the energy, time and spatial resoluti... View full abstract»

• ### PSPMT/APD Hybrid DOI Detectors for the PET Component of a Dedicated Breast PET/CT System—A Feasibility Study

Publication Year: 2008, Page(s):853 - 861
Cited by:  Papers (8)
| | PDF (1462 KB) | HTML

We explore two depth of interaction (DOI) capable detectors with a high effective packing fraction to be used for the PET portion of a next generation cylindrical pendant breast PET/CT scanner. The proposed dual-readout detectors consist of an unpolished (14 14) array of LSO crystals coupled to a position sensitive-PMT (PSPMT) at the back end for position sensing and either (A) a (2 2) matrix of a... View full abstract»

• ### High-Resolution L(Y)SO Detectors Using PMT-Quadrant-Sharing for Human and Animal PET Cameras

Publication Year: 2008, Page(s):862 - 869
Cited by:  Papers (29)
| | PDF (2823 KB) | HTML

We developed high resolution L(Y)SO detectors for human and animal PET applications using Photomulti- plier-quadrant-sharing (PQS) technology. The crystal sizes were 1.27 times 1.27 times 10 mm3 for the animal PQS-blocks and 3.25 times 3.25 times 20 mm3 for human ones. Polymer mirror film patterns (PMR) were placed between crystals as reflector. The blocks were assembled toge... View full abstract»

• ### CdTe Strip Detector Characterization for High Resolution Small Animal PET

Publication Year: 2008, Page(s):870 - 876
Cited by:  Papers (18)
| | PDF (1403 KB) | HTML

Excellent spatial resolution is a requirement for preclinical PET imaging. In order to achieve spatial resolution of significantly better than one millimeter, an appealing possibility is to employ direct detector materials, such as cadmium telluride (CdTe). Prototype thin orthogonal strip detectors have been developed for testing. They have dimensions of 20 mm by 20 mm and are 0.5 mm thick, and ha... View full abstract»

• ### Novel Silicon Photomultipliers for PET Applications

Publication Year: 2008, Page(s):877 - 881
Cited by:  Papers (22)
| | PDF (546 KB) | HTML

Silicon photomultipliers (SiPMs) with quantum efficiency maximized for a wavelength between 420 and 470 nm have been developed at ITC-irst Trento (Italy), and are being tested for their application in the construction of a ultra high resolution small animal PET tomograph. The devices have an area of 1 mm times 1 mm and 625 microcells. The breakdown voltage is around 30 V, and the gain of the order... View full abstract»

• ### An Investigation Into the Use of Geiger-Mode Solid-State Photomultipliers for Simultaneous PET and MRI Acquisition

Publication Year: 2008, Page(s):882 - 888
Cited by:  Papers (34)  |  Patents (2)
| | PDF (1182 KB) | HTML

Photon detecting Geiger-mode solid-state devices are being actively researched and developed because, unlike photo- multiplier tubes (PMT), they can be used in high-magnetic-field and radio-frequency environments, such as in magnetic resonance imaging (MRI) scanners. In addition, some Geiger-mode solid-state devices have higher photon detection efficiencies than PMTs and higher gains than avalanch... View full abstract»

• ### 20-$mu{hbox {m}}$ Resolution Imaging of Soft X-Ray Emitters

Publication Year: 2008, Page(s):889 - 897
| | PDF (2038 KB) | HTML

The performance of a soft X-ray (3 to 10 keV) coded aperture microscope designed for 18 mum resolution over a field of view (FoV) of 7.9 mm times 7.9 mm with a sensitivity of 8times10-4 at 1 cm is presented. The microscope is based on a commercially available deep-depletion CCD detector with 20 mum pixels and peak intrinsic efficiency 75%. The aperture is an arrangement of 45600 10-mum ... View full abstract»

• ### Assessment of a New High-Performance Small-Animal X-Ray Tomograph

Publication Year: 2008, Page(s):898 - 905
Cited by:  Papers (35)  |  Patents (2)
| | PDF (1624 KB) | HTML

We have developed a new X-ray cone-beam tomograph for in vivo small-animal imaging using a flat panel detector (CMOS technology with a microcolumnar CsI scintillator plate) and a microfocus X-ray source. The geometrical configuration was designed to achieve a spatial resolution of about 12 lpmm with a field of view appropriate for laboratory rodents. In order to achieve high performance with regar... View full abstract»

• ### Development of a Small Animal PET Scanner Using DOI Detectors

Publication Year: 2008, Page(s):906 - 911
Cited by:  Papers (14)
| | PDF (2154 KB) | HTML

A small animal PET scanner using 256-channel PS-PMTs has been designed, constructed, and evaluated. The scanner has twelve detector modules, each of which consists of a double-layer array of LYSO crystals and three PS-PMTs (Hama- matsu R8400-00-M256). In the LYSO crystal block, 32 times 53 crystal elements are optically coupled to 32 times 54 crystal elements with a shift of half the element pitch... View full abstract»

• ### Concept Verification of Three-Layer DOI Detectors for Small Animal PET

Publication Year: 2008, Page(s):912 - 917
Cited by:  Papers (15)  |  Patents (1)
| | PDF (931 KB) | HTML

Improved spatial resolution without sacrificing sensitivity is one of the most challenging developmental goals for small animal PET scanners. The 3-layer configuration that we propose here utilizes relative offsets of half a crystal pitch in x- and y-directions, and pulse shape discrimination to obtain depth of interaction (DOI). Three layers of crystals with a dimension 1.5 x 1.5 x 7.0 mm3 View full abstract»

• ### Evaluation of Machine Learning Algorithms for Localization of Photons in Undivided Scintillator Blocks for PET Detectors

Publication Year: 2008, Page(s):918 - 924
Cited by:  Papers (20)
| | PDF (929 KB) | HTML

Neural Networks trained with error back propagation Levenberg-Marquardt training (LM), Neural Networks trained with an algebraic method and Support Vector Machines (SVM) were evaluated to extract the position information from measured light distributions generated by the interactions of 511 keV photons in monolithic scintillator blocks. All three algorithms can achieve a similar average resolution... View full abstract»

• ### Real Time Implementation of a Wiener Filter Based Crystal Identification Algorithm

Publication Year: 2008, Page(s):925 - 929
Cited by:  Papers (23)
| | PDF (756 KB) | HTML

The recently launched LabPETtrade, a small animal Avalanche PhotoDiode (APD)-based PET scanner with quasi-individual readout and massively parallel processing, makes it possible to acquire real-time information necessary for Positron Emission Tomography (PET) image reconstruction. Since each APD is coupled to an LYSO/LGSO phoswich scintillator pair, an efficient crystal identification algorithm mu... View full abstract»

• ### Wavelets-Based Crystal Identification of Phoswich Detectors for Small-Animal PET

Publication Year: 2008, Page(s):930 - 935
Cited by:  Papers (9)
| | PDF (732 KB) | HTML

The advent of new all-digital electronic architectures in PET scanners enables the development and investigation of novel crystal identification algorithms for phoswich detectors used for parallax mitigation or higher detector pixelization. The high flexibility and real-time signal processing capability of FPGA/DSP-based digital electronics, such as the one developed for the LabPET scanner, provid... View full abstract»

• ### Last Results of a First Compton Probe Demonstrator

Publication Year: 2008, Page(s):936 - 941
Cited by:  Papers (10)
| | PDF (737 KB) | HTML

A first prostate probe prototype based on the Compton imaging technique has been developed, with a scatter detector composed of a stack of five thick silicon pad detectors, and a scintillator as absorption detector. The silicon sensors are 4 cm times 1 cm, 1 mm thick, with 1.4 mm times 1.4 mm pad dimensions. The scatter detector performance has been optimized, and an energy resolution about 1.4 ke... View full abstract»

• ### Realistic PET Monte Carlo Simulation With Pixelated Block Detectors, Light Sharing, Random Coincidences and Dead-Time Modeling

Publication Year: 2008, Page(s):942 - 952
Cited by:  Papers (11)
| | PDF (655 KB) | HTML

We have developed and validated a realistic simulation of random coincidences, pixelated block detectors, light sharing among crystal elements and dead-time in 2D and 3D positron emission tomography (PET) imaging based on the SimSET Monte Carlo simulation software. Our simulation was validated by comparison to a Monte Carlo transport code widely used for PET modeling, GATE, and to measurements mad... View full abstract»

• ### On Iterative Bayes Algorithms for Emission Tomography

Publication Year: 2008, Page(s):953 - 966
Cited by:  Papers (2)
| | PDF (1427 KB) | HTML

In this paper we formulate a new approach to medical image reconstruction from projections in emission tomography. This approach conceptually differs from the traditional methods such as filtered backprojection, maximum likelihood or maximum penalized likelihood. Similar to the Richardson-Lucy algorithm ([1], [2]), our method develops directly from the Bayes formula with the final result being an ... View full abstract»

• ### Convolution-Based Forced Detection Monte Carlo Simulation Incorporating Septal Penetration Modeling

Publication Year: 2008, Page(s):967 - 974
Cited by:  Papers (7)
| | PDF (1155 KB) | HTML

In SPECT imaging, photon transport effects such as scatter, attenuation and septal penetration can negatively affect the quality of the reconstructed image and the accuracy of quantitation estimation. As such, it is useful to model these effects as carefully as possible during the image reconstruction process. Many of these effects can be included in Monte Carlo (MC) based image reconstruction usi... View full abstract»

• ### Image Reconstruction for a Partially Collimated Whole Body PET Scanner

Publication Year: 2008, Page(s):975 - 983
Cited by:  Papers (3)
| | PDF (6228 KB) | HTML

Partially collimated PET systems have less collimation than conventional 2-D systems and have been shown to offer count rate improvements over 2-D and 3-D systems. Despite this potential, previous efforts have not established image-based improvements with partial collimation and have not customized the reconstruction method for partially collimated data. This work presents an image reconstruction ... View full abstract»

• ### Implementation of Histogram Based Soft-Tissue Segmentation for Single Spiral Transmission Scanning in Whole Body PET

Publication Year: 2008, Page(s):984 - 991
Cited by:  Papers (2)
| | PDF (1536 KB) | HTML

3D continuous emission and spiral transmission (CEST) scanning provides a high-throughput whole-body PET study by using two dedicated detectors for 3D emission and singles transmission, together with continuous bed movement. To supress the amount of transmission scatter components (TSC) in singles transmission data, the transmission detector was designed to have a short axial extent with a highly ... View full abstract»

• ### An Assessment of a Low-Cost Visual Tracking System (VTS) to Detect and Compensate for Patient Motion During SPECT

Publication Year: 2008, Page(s):992 - 998
Cited by:  Papers (10)
| | PDF (973 KB) | HTML

Patient motion is inevitable in SPECT and PET due to the lengthy period of time patients are imaged and patient motion can degrade diagnostic accuracy. The goal of our studies is to perfect a methodology for tracking and correcting patient motion when it occurs. In this paper we report on enhancements to the calibration, camera stability, accuracy of motion tracking, and temporal synchronization o... View full abstract»

## Aims & Scope

IEEE Transactions on Nuclear Science focuses on all aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.

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## Meet Our Editors

Editor-in-Chief
Paul Dressendorfer
11509 Paseo del Oso NE
Albuquerque, NM  87111  USA