Patient dosimetry in diagnostic radiology

Ciraj-Bjelac, F Olivera; Marković, Srpko; Kosutic, Dusko

doi:10.2298/ntrp0301036c

Cited by 12 publications

(3 citation statements)

References 3 publications

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“…Diagnostic radiology by the use of ionizing radiation plays a main contribution in the collective dose of human population (1,2). Knowing the radiation dose received by the patients during radiologic examination is essential in preventing the excess health risk of exposure (3).…”

Section: Introductionmentioning

confidence: 99%

Cumulative Radiation Dose and Cancer Risk Estimation in Common Diagnostic Radiology Procedures

et al. 2018

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Background: Diagnostic radiology by the use of ionizing radiation plays a main contribution in the collective dose of human population. Knowing the radiation dose received by patients during a radiological examination is essential to prevent the excess health risk of exposure. Objectives: The aim of this study was to estimate the collective dose and calculate the cancer risk probability due to common radiological procedures in four radiology imaging centers of Iran. Patients and Methods: Four hundred seventy patients who underwent different radiological examinations including the skull, chest, abdomen, pelvis, lumbar, cervical and thoracic regions in four radiology centers of Hamadan, Iran were studied. The patients' entrance surface dose (ESD) was measured, and eventually, the effective dose (ED) was calculated. These parameters were compared with the reported values and international standard levels. Finally, the risk of cancer was determined by two different methods proposed in international commission on radiological protection (ICRP) 103.

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Section: Introductionmentioning

confidence: 99%

Cumulative Radiation Dose and Cancer Risk Estimation in Common Diagnostic Radiology Procedures

et al. 2018

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“…In many instances, high radiation dosages are often used to obtain higher-quality images; however, this increases patients' exposure to radiation. The potential loss of diagnostic data owing to a low radiation dosage must be evaluated against the increased risk of cancer associated with a higher radiation dose [ 6 - 9 ]. A rule of "as low as reasonably achievable" (ALARA) should be observed during radiological examinations to minimize these risks [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Entrance Skin Dose (ESD) and Bucky Table Induced Backscattered Dose (BTI-BSD) in Abdominal Radiography With nanoDot Optically Stimulated Luminescence Dosimeter (OSLD)

Sayed¹,

Roslan²,

Syed³

2023

Cureus

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In radiography, inconsistencies in patients' measured entrance skin dose (ESD) exist. There is no published research on the bucky table induced backscattered radiation dose (BTI-BSD). Thus, we aimed to ascertain ESD, calculate the BTI-BSD in abdominal radiography with a nanoDot OSLD, and compare the ESD results with the published data.A Kyoto Kagaku PBU-50 phantom (Kyoto, Japan) in an antero-posterior supine position was exposed, selecting a protocol used for abdominal radiography. The central ray of x-ray beam was pointed at the surface of abdomen at the navel, where a nanoDot dosimeter was placed to measure ESD. For the BTI-BSD, exit dose (ED) was determined by placing a second dosimeter on the exact opposite side (backside) of the phantom from the dosimeter used to determine (ESD) with and without bucky table at identical exposure parameters. The BTI-BSD was calculated as the difference between ED with and without bucky table. The ESD, ED, and BTI-BSD were measured in milligray (mGy).ESD mean values with and without bucky table were 1.97 mGy and 1.84 mGy, whereas ED values were 0.062 mGy and 0.052 mGy, respectively. Results show 2-26% lower ESD values with nanoDot OSLD. The BTI-BSD mean value was found to be approximately 0.01 mGy.A local dose reference level (LDRL) can be established using ESD data to safeguard patients from unnecessary radiation. In addition, to minimize the risk of BTI-BSD in patients in radiography, the search for the use or fabrication of a new, lower atomic number material for the bucky table is suggested.

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“…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

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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.

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Patient dosimetry in diagnostic radiology

Cited by 12 publications

References 3 publications

Cumulative Radiation Dose and Cancer Risk Estimation in Common Diagnostic Radiology Procedures

Cumulative Radiation Dose and Cancer Risk Estimation in Common Diagnostic Radiology Procedures

Entrance Skin Dose (ESD) and Bucky Table Induced Backscattered Dose (BTI-BSD) in Abdominal Radiography With nanoDot Optically Stimulated Luminescence Dosimeter (OSLD)

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

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