A comparison of in-air and in-water calibration of a dosimetry system used for radiation dose assessment in cancer therapy

Arshed, Waheed; Mahmood, Khalid; Qazi, Ikramullah; Ullah, Asad; Akhter, Perveen; Ahmad, S; Jamil, Zeeshan

doi:10.2298/ntrp1001051a

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The converter is situated approximately 1.5 m from the source’s center. The dose rate at the converter, measured to be approximately 49.84 R/min, has been calibrated using a PTW UNIDOS [ 20 ], with dosimetry accuracy within 2.5%. The system was exposed for a duration of 30 min to accumulate a substantial quantity of photons, ensuring the detection of a sufficient number of Compton scattered electrons for calibration purposes.…”

Section: Methodsmentioning

confidence: 99%

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Zhang,

Sheng,

Song

et al. 2024

Sensors

View full text Add to dashboard Cite

The domain of gamma-ray imaging necessitates technological advancements to surmount the challenge of energy-selective imaging. Conventional systems are constrained in their dynamic focus on specific energy ranges, a capability imperative for differentiating gamma-ray emissions from diverse sources. This investigation introduces an innovative imaging system predicated on the detection of recoil electrons, addressing the demand for adjustable energy selectivity. Our methodology encompasses the design of a gamma-ray imaging system that leverages recoil electron detection to execute energy-selective imaging. The system’s efficacy was investigated experimentally, with emphasis on the adaptability of the energy selection window. The experimental outcomes underscore the system’s adeptness at modulating the energy selection window, adeptly discriminating gamma rays across a stipulated energy spectrum. The results corroborate the system’s adaptability, with an adjustable energy resolution that coincides with theoretical projections and satisfies the established criteria. This study affirms the viability and merits of utilizing recoil electrons for tunable energy-selective gamma-ray imaging. The system’s conceptualization and empirical validation represent a notable progress in gamma-ray imaging technology, with prospective applications extending from medical imaging to astrophysics. This research sets a solid foundation for subsequent inquiries and advancements in this domain.

show abstract

Section: Methodsmentioning

confidence: 99%

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Zhang,

Sheng,

Song

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…Dosimetric ma te ri als of differ ent types have been stud ied over the de cades to as sess their dosimetric per for mance for var i ous ra di a tion beams. Among the var i ous dosimetric sys tems, there are di a mond de tec tors [3], ion iza tion cham bers [4][5][6], scin tilla tors [7], semi con duc tor de tec tors [8], ra dio-chro mic film [9], ESR do sim e ters [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], thermoluminescent do sim e ters (TLD) [25][26][27][28], and scin til la tion do sim e ters [29]. Of ten these dosimetric sys tems are aided by Monte Carlo sim u la tions that also pro vide many de tails on the par ti cle types and en ergy spec tra [17,30,31].…”

Section: Introductionmentioning

confidence: 99%

Preliminary magnetic resonance relaxometric analysis of Fricke gel dosimeters produced with polyvinyl alcohol and glutaraldehyde

Gallo

Collura

Iacoviello³

et al. 2017

NUCL TECH RAD PROT

View full text Add to dashboard Cite

This work de scribes the pre lim i nary anal y sis of Fricke gels do sim e ters char ac ter ized by a new for mu la tion mak ing use of a ma trix of poly vi nyl al co hol cross-linked by add ing glutaraldehyde and an a lyzed by means of nu clear mag netic res o nance relaxometry. In pre vi ous op ti cal stud ies, these gels have shown prom is ing dosimetric fea tures in terms of pho ton sen si tiv ity and low diffu sion of fer ric ions pro duced af ter ir ra di a tion. In this work, we used a por ta ble nu clear mag netic res o nance relaxometer to mea sure the re laxation times (which are im por tant for dosimetric ap pli ca tions) of these gel ma te ri als. For this pur pose, we per formed a study for op ti miz ing the ac qui si tion pa ram e ters with a nu clear magnetic res o nance relaxometer. Gel sam ples were ex posed to clin i cal 6 MV pho tons in the dose range be tween 0 and 20 Gy. Nu clear mag netic res o nance relaxometry mea sure ments were performed and the sen si tiv ity to pho ton beams was mea sured for var i ous val ues of the Fe 2+ ion con cen tra tion. The anal y ses pointed out that the MR sig nal in creases as the Fe 2+ con tent increases and the in crease is about 75 % when the con cen tra tion of Fe 2+ ions is in creased from 0.5 mM to 2.5 mM. Fur ther more, the sen si tiv ity im prove ment achieved with in creas ing the Fe 2+ con cen tra tion is about 60 %. This pa per shows that the por ta ble nu clear mag netic res onance relaxometer used for anal y sis of po rous ma te ri als can be used for char ac ter iza tion of these dosimetric gels and this study can be con sid ered as the first step for the char ac ter iza tion of these do sim e ters which in fu ture could be used for 3-D dose map ping in clin i cal ap pli ca tions.

show abstract

Analyzing the transient effects of 60Co gamma rays in a CIS by Monte Carlo method

et al. 2019

View full text Add to dashboard Cite

A comparison of in-air and in-water calibration of a dosimetry system used for radiation dose assessment in cancer therapy

Cited by 4 publications

References 0 publications

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Preliminary magnetic resonance relaxometric analysis of Fricke gel dosimeters produced with polyvinyl alcohol and glutaraldehyde

Analyzing the transient effects of 60Co gamma rays in a CIS by Monte Carlo method

Contact Info

Product

Resources

About