Seated vs. supine: optimum measurement pose for brain-dedicated PET

2017 ◽  
Author(s):  
Yuma Iwao ◽  
Hideaki Tashima ◽  
Eiji Yoshida ◽  
Fumihiko Nishikido ◽  
Hidekatsu Wakizaka ◽  
...  
Keyword(s):  
Optimum Measurement ◽  
Dedicated Pet

Seated versus supine: consideration of the optimum measurement posture for brain-dedicated PET

2019 ◽  
Vol 64 (12) ◽  
pp. 125003 ◽  
Author(s):  
Yuma Iwao ◽  
Hideaki Tashima ◽  
Eiji Yoshida ◽  
Fumihiko Nishikido ◽  
Takahiro Ida ◽  
...  
Keyword(s):  
Optimum Measurement ◽  
Dedicated Pet

F-18-FDG Positron Imaging in Oncological Patients: Gamma Camera Coincidence Detection versus Dedicated PET

1999 ◽  
Vol 38 (04) ◽  
pp. 108-114 ◽  
Author(s):  
H.-J. Kaiser ◽  
U. Cremerius ◽  
O. Sabri ◽  
M. Schreckenberger ◽  
P. Reinartz ◽  
...  
Keyword(s):  
Attenuation Correction ◽  
Spatial Resolution ◽  
Gamma Camera ◽  
Lesion Detection ◽  
Coincidence Detection ◽  
System Sensitivity ◽  
Oncological Patients ◽  
Phantom Studies ◽  
Pet System ◽  
Dedicated Pet

Summary Aim of the present study was to investigate the feasibility of 2-[fluorine-18]-fluoro-2-deoxy-D-glucose (FDG) imaging in oncological patients with a dual head gamma camera modified for coincidence detection (MCD). Methods: Phantom studies were done to determine lesion detection at various lesion-to-background ratios, system sensitivity and spatial resolution. Thirty-two patients with suspected or known malignant disease were first studied with a dedicated full-ring PET system (DPET) applying measured attenuation correction and subsequently with an MCD system without attenuation correction. MCD images were first interpreted without knowledge of the DPET findings. In a second reading, MCD and DPET were evaluated simultaneously. Results: The phantom studies revealed a comparable spatial resolution for DPET and MCD (5.9 × 6.3 × 4.2 mm vs. 5.9 × 6.5 × 6.0 mm). System sensitivity of MCD was less compared to DPET (91 cps/Bq/ml/cmF0V vs. 231 cps/ Bq/ml/cmFOv). At a lesion-to-background ratio of 4:1, DPET depicted a minimal phantom lesion of 1.0 cm in diameter, MCD a minimal lesion of 1.6 cm. With DPET, a total of 91 lesions in 27 patients were classified as malignant. MCD without knowledge of DPET results revealed increased FDG uptake in all patients with positive DPET findings. MCD detected 72 out of 91 DPET lesions (79.1 %). With knowledge of the DPET findings, 11 additional lesions were detected (+12%). MCD missed lesions in six patients with relevance for staging in two patients. All lesions with a diameter above 18 mm were detected. Conclusion: MCD FDG imaging yielded results comparable to dedicated PET in most patients. However, a considerable number of small lesions clearly detectable with DPET were not detected by MCD alone. Therefore, MCD cannot yet replace dedicated PET in all oncological FDG studies. Further technical refinement of this new method is needed to improve image quality (e.g. attenuation correction).

scholarly journals Quantum Binary Decision for Driven Harmonic Oscillator

1997 ◽  
Vol 11 (29) ◽  
pp. 3419-3432
Author(s):  
Matteo G. A. Paris
Keyword(s):  
Harmonic Oscillator ◽  
Detection Probability ◽  
Random Phase ◽  
Initial State ◽  
Binary Decision ◽  
Pearson Criterion ◽  
Phase Perturbation ◽  
General Bound ◽  
Quantum Detection ◽  
Optimum Measurement

We address the problem of determining whether or not a harmonic oscillator has been perturbed by an external force. Quantum detection and estimation theory has been used in devising optimum measurement scheme according to the Neyman–Pearson criterion. Detection probability has been evaluated for different initial state preparations of oscillator. The corresponding lower bounds on minimum detectable perturbation intensity has been evaluated and a general bound for random phase perturbation has been also induced.

Development of Electric Power Measurement for Energy Harvesting Using Unimorph-Type Piezoceramics

2011 ◽  
Vol 485 ◽  
pp. 173-176 ◽  
Author(s):  
Yoshikazu Shimura ◽  
Petr Pulpan ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Satoshi Wada
Keyword(s):  
Energy Harvesting ◽  
Electric Power ◽  
Figure Of Merit ◽  
Power Measurement ◽  
Piezoelectric Energy Harvesting ◽  
Material Constants ◽  
Piezoelectric Energy ◽  
Type Device ◽  
Pulse Type ◽  
Optimum Measurement

In this study, a new electric power generation measurement system was developed for piezoelectric energy harvesting using unimorph-type piezoceramics. Relationships between electric power and material constants such as d33, d31, g31, k31, e33T/e0, s11E, Qe and Qm were investigated using various lead zirconium titanate (Pb(Zr,Ti)O3, PZT) ceramics with different material constants. Using the equipment, pulse-type stress was applied to unimorph-type piezoceramics. Then, optimum measurement conditions were determined. Under these conditions, the electric power for piezoelectric energy harvesting was measured as a function of the material constants. Finally, it was clarified that for piezoelectric energy harvesting using a unimorph-type device, the figure of merit was combination of the 3 kinds of material constants such as large d31, small e33T/e0, and large s11E.

Abstract P5-01-14: Visualisation of histologic proven breast cancer on the MAMMI-PET: A dedicated PET for hanging breast imaging

2015 ◽  
Author(s):  
Suzana C Teixeira ◽  
José Ferrer Rebolleda ◽  
Bas B Koolen ◽  
Raúl Sánches Jurado ◽  
Marcel P Stokkel ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Imaging ◽  
Dedicated Pet

scholarly journals TOF studies for dedicated PET with open geometries

2019 ◽  
Vol 14 (02) ◽  
pp. C02006-C02006
Author(s):  
L. Moliner ◽  
V. Ilisie ◽  
A. Gonzalez ◽  
S. Oliver ◽  
A. Gonzalez ◽  
...  
Keyword(s):  
Dedicated Pet
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