Radiation therapy dosimetry system

Rivera-Montalvo, T.

doi:10.1016/j.apradiso.2013.07.011

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…However, larger quantities of radioisotopes having short half-lives could be administered in order to attain a prolonged stable signal. This ultimately leads to excessive radiation attenuation by tissues [3,4] and high diagnostic patient doses [68]. Lack of sensitivity stability over a prolonged duration could limit the application of the CLI imaging technique to procedures like total body tomography; imaging of the whole body is done—not only a specific region of interest [69].…”

Section: Charge Couple Devices (Ccd)/charge Metal Oxide Semiconducmentioning

confidence: 99%

“…Today, radiation is used for carrying out radiotherapeutic or imaging procedures like Computed Tomography (CT)—in the field of medicine [2]. However, during its applications, there has to be precaution since excessive radiation attenuation by human tissue may result into high absorbed dose values [3,4]. This could be a root cause of secondary malignancies [4].…”

Section: Introductionmentioning

confidence: 99%

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A Review: Photonic Devices Used for Dosimetry in Medical Radiation

Damulira

Yusoff

Omar

et al. 2019

Sensors

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Numerous instruments such as ionization chambers, hand-held and pocket dosimeters of various types, film badges, thermoluminescent dosimeters (TLDs) and optically stimulated luminescence dosimeters (OSLDs) are used to measure and monitor radiation in medical applications. Of recent, photonic devices have also been adopted. This article evaluates recent research and advancements in the applications of photonic devices in medical radiation detection primarily focusing on four types; photodiodes – including light-emitting diodes (LEDs), phototransistors—including metal oxide semiconductor field effect transistors (MOSFETs), photovoltaic sensors/solar cells, and charge coupled devices/charge metal oxide semiconductors (CCD/CMOS) cameras. A comprehensive analysis of the operating principles and recent technologies of these devices is performed. Further, critical evaluation and comparison of their benefits and limitations as dosimeters is done based on the available studies. Common factors barring photonic devices from being used as radiation detectors are also discussed; with suggestions on possible solutions to overcome these barriers. Finally, the potentials of these devices and the challenges of realizing their applications as quintessential dosimeters are highlighted for future research and improvements.

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Section: Charge Couple Devices (Ccd)/charge Metal Oxide Semiconducmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review: Photonic Devices Used for Dosimetry in Medical Radiation

Damulira

Yusoff

Omar

et al. 2019

Sensors

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“…Pemanfaatan sinar gamma dalam radioterapi memerlukan pengukuran dosis yang tepat untuk mencegah dan meminimalkan efek samping pada pengguna maupun pekerja terapi. Dosimetri radiasi berperan penting dalam kualiti kontrol proses radiasi (Rivera-Montalvo, 2014). Dosimeter berbasis larutan kimia ferrous sulfate yang disebut juga dengan dosimeter Fricke merupakan dosimeter standar yang telah digunakan dalam dosimetri radiasi.…”

Section: Pendahuluanunclassified

“…Rentang dosis yang dapat diukur TLD bergantung pada sensitivitas dan respon nanomaterialnya, tidak dapat mengukur dosis rendah dan dosis tinggi (Salah, 2011). Berbagai nanomaterial TLD didoping dengan cerium untuk meningkatkan karakteristiknya (Ravikumar, dkk;2014;Zahedifar, dkk., 2013). Oksida cerium (CeO2) telah dikaji untuk sensor radiasi sinar gamma dalam bentuk thick film p-n jucntion (Arshak dan Korostynska, 2004…”

Section: Pendahuluanunclassified

RESPON LARUTAN NANOPARTIKEL CeO2 TERHADAP RADIASI SINAR GAMMA DOSIS RENDAH

Nurhasanah

Lutfia²,

Arifin³

2019

JITeK

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Penelitian ini bertujuan untuk mengkaji respon larutan nanopartikel CeO2 terhadap radiasi sinar gamma dosis rendah. Nanopartikel CeO2 disintesis menggunakan metode presipitasi. Struktur dan sifat optis nanopartikel CeO2 dianalisis menggunakan difraktometeri sinar-X dan spektrofotometer UV Vis. Larutan nanopartikel CeO2 dengan konsentrasi berbeda diradiasi dengan sinar gamma dari sumber Co-60 teletherapy. Pola difraksi menunjukkan pembentukan nanopartikel CeO2 dengan ukuran kristalit 9,9 nm.Analisis absorbansi larutan nanopartikel CeO2 menunjukkan perubahan absorbansi linier terhadap peningkatan dosis. Konsentrasi larutan tidak memberikan pengaruh signifikan terhadap respon larutan nanopartikel CeO2 terhadap radiasi sinar gamma. Larutan nanopartikel CeO2 dapat digunakan untuk mengukur radiasi sinar gamma dengan rentang dosis 0 – 3 Gy.

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“…One can find the dose rate in real cases, just simply, by multiplying Equation (2) with the known flux (#/cm 2 -sec), γ-ray energy, E (MeV) and linear mass absorption coefficient µ ρ (cm 2 /g) of the dose receiving material. Equation (2) shows that the maxima in the dose rate can occur only when the solid angle subtended by the rectangular surface of the package with point isotropic source has the maxima. The solid angle subtended by any area at a distance r from a point isotropic source can be given by [9] …”

Section: Theoretical Modelmentioning

confidence: 99%

Theoretical Determination and Experimental Verification of Transport Index of Rectangular Shaped Radioactive Containers

Jamil

Asim²,

Irfat³

et al. 2014

WJNST

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Ionizing radiations are widely used to sustain and enhance our quality of life in the areas such as medical diagnosis, therapy, scientific research and industry etc. Ionizing radiations are available from radioactive sources which are made of radioactive materials. The radioactive materials are produced in either nuclear power or research reactors or nuclear accelerators or extracted from the naturally found radioactive ores. These radioactive sources and radioactive materials need to be transported from their places of production to the places of applications and finally to waste repositories. The radioactive materials are transported in well designed packages having various shapes and sizes. In the field of radioactive transport, it is a mandatory to find the Transport Index (TI) to be mentioned on each package for transportation. This research is focused on the determination of the maximum γ-ray radiation dose at one meter from the surface of cubic and rectangular shaped package or containers. A computer code "Solid Angle for Transport Index" (SAFTI) has been developed using MATLAB to determine the location of maximum value of the radiation dose rate from the surface of a rectangular or square container. This maximum dose rate is used to determine the transport index. Some of the results of the code have been compared with the experimental results. The results of this research are useful not only to determine TI for individual packages but also to find the TI of the vehicles carrying the transport packages.

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Radiation therapy dosimetry system

Cited by 10 publications

References 20 publications

A Review: Photonic Devices Used for Dosimetry in Medical Radiation

A Review: Photonic Devices Used for Dosimetry in Medical Radiation

RESPON LARUTAN NANOPARTIKEL CeO2 TERHADAP RADIASI SINAR GAMMA DOSIS RENDAH

Theoretical Determination and Experimental Verification of Transport Index of Rectangular Shaped Radioactive Containers

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