Internal radiation dose estimation using multiple D-shuttle dosimeters for positron emission tomography (PET): A validation study using NEMA body phantom

2018 ◽  
Vol 45 (10) ◽  
pp. 4693-4703 ◽  
Author(s):  
Md. Shahidul Islam ◽  
Shoichi Watanuki ◽  
Manabu Tashiro ◽  
Hiroshi Watabe
Keyword(s):  
Positron Emission Tomography ◽  
Radiation Dose ◽  
Validation Study ◽  
Emission Tomography ◽  
Dose Estimation ◽  
Internal Radiation ◽  
Positron Emission

Measurement of radiation dose to the thyroid using positron emission tomography

1987 ◽  
Vol 60 (711) ◽  
pp. 245-251 ◽  
Author(s):  
R. J. Ott ◽  
V. Batty ◽  
S. Webb ◽  
M. A. Flower ◽  
M. O. Leach ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Radiation Dose ◽  
Emission Tomography ◽  
Positron Emission

EFFECTS OF THE SCAN RANGE ON RADIATION DOSE IN THE COMPUTED TOMOGRAPHY COMPONENT OF ONCOLOGY POSITRON EMISSION TOMOGRAPHY/COMPUTED TOMOGRAPHY

2018 ◽  
Vol 185 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Yusuke Inoue ◽  
Kazunori Nagahara ◽  
Hiroko Kudo ◽  
Hiroyasu Itoh
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Radiation Dose ◽  
Effective Dose ◽  
The Body ◽  
Emission Tomography ◽  
Whole Body ◽  
Computed Tomography Images ◽  
Positron Emission ◽  
Proximal Thigh

Abstract We performed phantom experiments to investigate radiation dose in the computed tomography component of oncology positron emission tomography/computed tomography in relation to the scan range. Computed tomography images of an anthropomorphic whole-body phantom were obtained from the head top to the feet, from the head top to the proximal thigh or from the skull base to the proximal thigh. Automatic exposure control using the posteroanterior and lateral scout images offered reasonable tube current modulation corresponding to the body thickness. However, when the posteroanterior scout alone was used, unexpectedly high current was applied in the head and upper chest. When effective dose was calculated on a region-by-region basis, it did not differ greatly irrespective of the scan range. In contrary, when effective dose was estimated simply by multiplying the scanner-derived dose-length product by a single conversion factor, estimates increased definitely with the scan range, indicating severe overestimation in whole-body imaging.

Quantification of Liver Glucose Metabolism by Positron Emission Tomography: Validation Study in Pigs

2007 ◽  
Vol 132 (2) ◽  
pp. 531-542 ◽  
Author(s):  
Patricia Iozzo ◽  
Mikko J. Jarvisalo ◽  
Jan Kiss ◽  
Ronald Borra ◽  
Gratian A. Naum ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Glucose Metabolism ◽  
Validation Study ◽  
Emission Tomography ◽  
Positron Emission

scholarly journals Image Resolution Enhancement of Highly Compressively Sensed CT/PET Signals

Algorithms ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 129
Author(s):  
Krzysztof Malczewski
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Radiation Dose ◽  
Image Enhancement ◽  
Resolution Enhancement ◽  
Super Resolution ◽  
Image Resolution ◽  
Emission Tomography ◽  
Hybrid Techniques ◽  
Positron Emission

One of the most challenging aspects of medical modalities such as Computed Tomography (CT) as well hybrid techniques such as CT/PET (Computed Tomography/Positron emission tomography) and PET/MRI is finding a balance between examination time, radiation dose, and image quality. The need for a dense sampling grid is associated with two major factors: image resolution enhancement, which leads to a strengthening of human perception, and image features interpretation. All these aspects make an unsupervised image processing much easier. The presented algorithm employs super-resolution-reconstruction with high accuracy motion fields’ estimation at its core for Computed Tomography/Positron Emission Tomography (CT/PET) images enhancement. The suggested method starts with processing compressively sensed input signals. This paper shows that it is possible to achieve higher image resolution while keeping the same radiation dose. The purpose of this paper is to propose a highly effective CT/PET image reconstruction strategy, allowing for simultaneous resolution enhancing and scanning time minimisation. The algorithm aims to overcome two major obstacles—image resolution limitation and algorithm reconstruction time efficiency-by combining a highly-sparse Ridgelet analysis based sampling pattern as well as PET signal sensing with super-resolution (SR) image enhancement. Due to the diverse nature of Computed Tomography, the applied Ridgelet analysis arguing its usability turned out to be efficient in reducing acquisition times in regard to maintaining satisfying scan quality. This paper presents a super-resolution image enhancement algorithm designed for handling highly sensitively compressed hybrid CT/PET scanners raw data. The presented technique allows for improving image resolution while reducing motion artefacts and keeping scanning times at pretty low levels.

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