Mammography Techniques and Review

Fernandes, Fabiano C.; Brasil, L. M.; Guadagnin, Renato da Veiga

doi:10.5772/58670

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…The data shows that, in a similar trend to the cross-section ratio calculated by the NIST XCOM software, the PTR of the Ce:LGSO scintillator was slightly greater than the Ce:GSO scintillator. Usually, the PTR would be proportional to the product of Z eff 5 and ρ [29]. The cause is the slightly greater density (7.07 g cm −3 versus 6.70 g cm −3 ) and an effective atomic number (59 versus 57) of the Ce:LGSO scintillator.…”

Section: Peak-to-total Ratiomentioning

confidence: 99%

A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators

Phunpueok,

Jaiyen,

Autila

et al. 2024

Mater. Res. Express

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In the present day, inorganic scintillators have been developed to detect high-energy photons such as X-rays and γ-rays. They have been applied in many works such as astronomy, materials inspection, high energy physics, industrial application, and natural resources exploration. Especially in the medical field, they are used as radiation detectors in diagnostic equipment such as PET scans, X-ray CT scans, SPECT scans, etc. This research studied the scintillation characteristics of Ce:GSO and Ce:LGSO single crystals. We found that at 662 keV gamma-ray energy, Ce:LGSO crystal has about 2.3 times more light yield than Ce:GSO crystal, but the energy resolution of both crystals is not different. For the degree of non-proportionality of both crystals, Ce:LGSO scintillator shows 0.08, which is better than the 0.19 obtained from Ce:GSO scintillator. This work also discusses the two scintillators' peak-to-total ratio, loss parameter, and intrinsic light yield.

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Section: Peak-to-total Ratiomentioning

confidence: 99%

A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators

Phunpueok,

Jaiyen,

Autila

et al. 2024

Mater. Res. Express

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“…As per definition, we have calculated the sensitivity for J-PEM scanner, which occurs to be equal 20.0 cps/kBq and 31.4 cps/kBq for 200 keV and 100 keV energy threshold, respectively. Typically the distance between the detectors can range from 5 to 10 cm, depending on the breast compression used [19]. Here we use the distance of 8 cm which is close to average used.…”

Section: Determination Of Annihilation Pointmentioning

confidence: 99%

Development of J-PEM for Breast Cancer Detection

Shivani

Łuczyńska

Heinze³

et al. 2020

Acta Phys. Pol. A

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A detection system of the conventional PET tomograph is set-up to record data from e + e − annihilation into two photons, each with energy of 511 keV, and to give information about the spatial density distribution of a radiopharmaceutical in the patients body. Dedicated positron emission mammography (PEM) systems provide a potentially high sensitivity, high-resolution, low attenuation, and lower cost alternative to whole body PET. We have designed, built, and performed initial evaluation of a large field-of-view Jagiellonian Positron Emission Mammography (J-PEM) system. This 3D system is based on novel idea of applying plastic scintillators to detect annihilation photons and improving spatial resolution by utilization of wavelength shifters (WLS). In addition, this device is being developed in view of classification of malignancy based on the possibility of positronium mean lifetime imaging. Here we present the first results from the simulations as motivation for our investigation.

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Comparison of Scintillation Light Yield of CWO and BGO Single Crystals for Gamma Ray Detection

Phunpueok

Thongpool

Jaiyen

et al. 2020

AMM

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Nowadays, radioactive materials are being applied in medical imaging. Because humans cannot observe radiation, radiation detection materials are very important to humans. A scintillator is a material that can change gamma photons to visible photons. Good scintillators should have the following properties: high scintillation light yield, good energy resolution, and high density. In this work, the scintillation light yield property of CWO crystals was studied due to its interesting properties, such as high stopping power and low hygroscopicity. CWO crystals were compared with BGO crystals. From the results, it was found that the BGO crystals showed higher scintillation light yield value at 662 keV energy from 137Cs radioactive source than the CWO crystals, resulting in better energy resolution value. The intrinsic light yield and loss parameters for both crystals are also presented in this work.

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Mammography Techniques and Review

Cited by 3 publications

References 5 publications

A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators

A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators

Development of J-PEM for Breast Cancer Detection

Comparison of Scintillation Light Yield of CWO and BGO Single Crystals for Gamma Ray Detection

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Mammography Techniques and Review

Cited by 3 publications

References 5 publications

A comparative study on the scintillation characteristics of Gd2SiO5:Ce and Lu1.2Gd0.8SiO5:Ce scintillators

A comparative study on the scintillation characteristics of Gd2SiO5:Ce and Lu1.2Gd0.8SiO5:Ce scintillators

Development of J-PEM for Breast Cancer Detection

Comparison of Scintillation Light Yield of CWO and BGO Single Crystals for Gamma Ray Detection

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A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators

A comparative study on the scintillation characteristics of Gd₂SiO₅:Ce and Lu_1.2Gd_0.8SiO₅:Ce scintillators