A Backprojection-Based Parameter Estimation Technique for Skew-Slit Collimation [0.03%]
一种基于反投影的斜缝准直参数估计技术
Jacob A Piatt,Gengsheng L Zeng
Jacob A Piatt
To estimate geometric parameters in a skew-slit single photon emission computed tomography (SPECT) scan, a simple method is presented that uses a single point source and a backprojection process. The method employs one point source placed s...
Evaluation of Rigid-Body Motion Compensation in Cardiac Perfusion SPECT Employing Polar-Map Quantification [0.03%]
评估心脏灌注SPECT采用极地图定量化 rigid-body运动补偿的效果
P Hendrik Pretorius,Karen L Johnson,Michael A King
P Hendrik Pretorius
We have recently been successful in the development and testing of rigid-body motion tracking, estimation and compensation for cardiac perfusion SPECT based on a visual tracking system (VTS). The goal of this study was to evaluate in patien...
Task Equivalence for Model and Human-Observer Comparisons in SPECT Localization Studies [0.03%]
SPECT定位研究中模型和人观察者比较的任务等效性
Anando Sen,Faraz Kalantari,Howard C Gifford
Anando Sen
While mathematical model observers are intended for efficient assessment of medical imaging systems, their findings should be relevant for human observers as the primary clinical end users. We have investigated whether pursuing equivalence ...
Nan Li,Ling-Jian Meng
Nan Li
This paper presents an analytical approach for performing adaptive angular sampling in single photon emission computed tomography (SPECT) imaging. It allows for a rapid determination of the optimum sampling strategy that minimizes image var...
Noise-Weighted FBP Algorithm for Uniformly Attenuated SPECT Projections [0.03%]
用于均匀衰减SPECT投影的噪声加权FBP算法
Gengsheng L Zeng
Gengsheng L Zeng
Noise-weighted FBP (filtered backprojection) algorithm and Bayesian FBP algorithm were developed recently for un-attenuated Radon transform, which have applications in x-ray CT (computed tomography). This paper extends the noise-weighted FB...
Capacitance-Based Dosimetry of Co-60 Radiation using Fully-Depleted Silicon-on-Insulator Devices [0.03%]
基于容量的剂量测量方法使用完全耗尽的绝缘体上硅器件进行Co-60辐射
Yulong Li,Warren M Porter,Rui Ma et al.
Yulong Li et al.
The capacitance based sensing of fully-depleted silicon-on-insulator (FDSOI) variable capacitors for Co-60 gamma radiation is investigated. Linear response of the capacitance is observed for radiation dose up to 64 Gy, while the percent cap...
Image-based Modeling of PSF Deformation with Application to Limited Angle PET Data [0.03%]
基于图像的PSF变形建模及其在限制角度PET数据中的应用
Samuel Matej,Yusheng Li,Joseph Panetta et al.
Samuel Matej et al.
The point-spread-functions (PSFs) of reconstructed images can be deformed due to detector effects such as resolution blurring and parallax error, data acquisition geometry such as insufficient sampling or limited angular coverage in dual-pa...
Investigation of the Intrinsic Spatial Resolution of an Intensified EMCCD Scintillation Camera [0.03%]
增强型EMCCD闪烁相机的固有空间分辨率研究
L J Meng,G Fu
L J Meng
In this paper, we present an experimental and Monte Carlo investigation of the intrinsic spatial resolution that can be achieved with the intensified electron-multiplying charge-coupled device (I-EMCCD) gamma camera [1]-[4]. This detector h...
Effect of Using 2mm Voxels on Observer Performance for PET Lesion Detection [0.03%]
2毫米体素使用对PET病灶检测的人工观察者性能的影响研究
A Michael Morey,Frédéric Noo,Dan J Kadrmas
A Michael Morey
Positron emission tomography (PET) images are typically reconstructed with an in-plane pixel size of approximately 4mm for cancer imaging. The objective of this work was to evaluate the effect of using smaller pixels on general oncologic le...
Stability of the Baseline Holder in Readout Circuits For Radiation Detectors [0.03%]
辐射探测器读出电路中保持基线稳定性的研究
Y Chen,Y Cui,P O&#x;Connor et al.
Y Chen et al.
Baseline holder (BLH) circuits are used widely to stabilize the analog output of application-specific integrated circuits (ASICs) for high-count-rate applications. The careful design of BLH circuits is vital to the overall stability of the ...