Estudo comparativo da qualidade da imagem e do kerma, de entrada e de saída, em simulador de tórax utilizando sistemas analógico e digitalizado CR de aquisição de imagens

Luz, Renata Matos da; Hoff, Gabriela

doi:10.1590/s0100-39842010000100011

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…In addition, the ED is the factor that has been defined as the radiation dose received by the skin opposite an irradiated surface [ 25 ]. Renata and Gabriela used the exit air kerma as one of the patient dose estimation parameters in computed radiography (CR) [ 26 ].…”

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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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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“…One is very gratified and happy to see that very interesting studies on those imaging methods are being developed and published. Here are some of them: Abdominal gossypiboma (1) , four beautiful case reports (2)(3)(4)(5) , gallbladder wall thickening (6) , correlation between PSA and prostate cancer (7) , study of cerebral ventricles (8) , BI-RADS US (9) , abnormal uterine bleeding (10) , intima-media complex in atherosclerosis (11) , comparison between US and MRI in the portal flow assessment (12) , endoleaks in the endovascular management of aortic aneurysms (13) , abnormalities in the first trimester of pregnancy (14) , radiographic findings in the treatment of pulmonary paracoccidioidomycosis (15) , neurofibromatosis (16) , study of the spine after cervical traction (17) , and finally, three articles about medical physics (18)(19)(20) .…”

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confidence: 99%

Por que parte da especialidade está sendo relegada a segundo plano dentro do diagnóstico por imagem?

Carvalho

2012

Radiol Bras

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Radiologists graduated until the mid-eighties had almost only the opportunity of learning the old, centennial, and nowadays relegated to the backstage, conventional radiology, since most of our teaching hospitals with residency programs simply were not equipped with ultrasonography (US), another method that is about to be relegated to the limbo by newly graduates. Some of the "veterans" have taken the same path, managing to learn about US, which they used for many years in their daily activity. Others were attracted by computed tomography (CT) and magnetic resonance imaging (MRI), following their own personal preferences and willingness to be technologically updated. And some decided to remain technologically stagnant. Among trainees, residents, master and PhD fellows, one observes almost a certain "neglect" regarding conventional radiology and US. On the other hand, CT and MRI attract attention and interest from the younger generation. Curiously, the very basis of imaging diagnosis is the old, conventional radiology. It is from conventional radiology that one learns to interpret, think, vary and suggest other things. One tries to find out a reason for this, beyond the obvious financial reward, as the days when MRI professional made as much money as they wanted, are gone. I firmly believe that the roles are changing. With so many new professionals willing to learn MRI and CT, will those who know how to perform, interpret and report with quality "in the old imaging methods" soon enjoy appreciation in the "marketplace"? With a view on this trend, especially on the almost manifested disdain that some residents demonstrate for allegedly loosing time learning conventional radiology and US, we have carried out a survey in the Radiologia Brasileira (RB) journal, to check into what is still being published about such almost abandoned "subspecialties". Such survey covered the past ten years-a good reference to begin with. With the Brazilian word "ultra-sonografia" (ultrasonography), still written in the former orthography with a hyphen, we have found 77 articles. With the word "ultrassonografia", the current spelling without the hyphen, 63 articles have been published by RB since 2009. In order to compare, let us take an international look. Who knows, maybe "below the Equator" we are obsolete, and in

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Estudo comparativo da qualidade da imagem e do kerma, de entrada e de saída, em simulador de tórax utilizando sistemas analógico e digitalizado CR de aquisição de imagens

Cited by 2 publications

References 2 publications

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

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

Por que parte da especialidade está sendo relegada a segundo plano dentro do diagnóstico por imagem?

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