scholarly journals Comparison of effective radiation doses from X-ray, CT, and PET/CT in pediatric patients with neuroblastoma using a dose monitoring program

2016 ◽  
Vol 22 (4) ◽  
pp. 390-394 ◽  
Author(s):  
Yeun Yoon Kim ◽  
Hyun Joo Shin ◽  
Myung Joon Kim ◽  
Mi Jung Lee
Keyword(s):  
Pediatric Patients ◽  
Monitoring Program ◽  
Radiation Doses ◽  
X Ray ◽  
Dose Monitoring ◽  
Pet Ct ◽  
Effective Radiation

Estimating Radiation Dose to Major Organs in Dental X-Ray Examinations: A Phantom Study

2020 ◽  
Author(s):  
Yong Li ◽  
Bingsheng Huang ◽  
Jun Cao ◽  
Tianqi Fang ◽  
Guoqing Liu ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Reference Level ◽  
Radiation Doses ◽  
Diagnostic Reference Level ◽  
Effective Radiation Dose ◽  
Organ Doses ◽  
X Ray ◽  
Absorbed Doses ◽  
Males And Females ◽  
Effective Radiation

Abstract The radiation doses absorbed by major organs of males and females were studied from three types of dental X-ray devices. The absorbed doses from cone-beam computed tomography (CBCT), panoramic and intraoral X-ray machines were in the range of 0.23–1314.85 μGy, and were observed to be high in organs and tissues located in or adjacent to the irradiated area, there were discrepancies in organ doses between male and female. Thyroid, salivary gland, eye lens and brain were the organs that received higher absorbed doses. The organ absorbed doses were considerably lower than the diagnostic reference level for dental radiography in China. The calculated effective radiation doses for males and females were 56.63, 8.15, 2.56 μSv and 55.18, 8.99, 2.39 μSv, respectively, when using CBCT, the panoramic X-ray machine and intraoral X-ray machine. The effective radiation dose caused by CBCT was much higher than those of panoramic and intraoral X-ray machines.

scholarly journals Cumulative radiation doses from recurrent PET/CT examinations

2021 ◽  
pp. 20210388
Author(s):  
Makoto Hosono ◽  
Mamoru Takenaka ◽  
Hajime Monzen ◽  
Mikoto Tamura ◽  
Masatoshi Kudo ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Imaging Modality ◽  
Tracking System ◽  
Radiation Doses ◽  
Effective Radiation Dose ◽  
Positron Emission ◽  
Pet Ct ◽  
Tissue Contrast ◽  
Key Issues ◽  
Effective Radiation

Positron emission tomography (PET)/computed tomography (CT) is an essential imaging modality for the management of various diseases. Increasing numbers of PET/CT examinations are carried out across the world and deliver benefits to patients; however, there are concerns about the cumulative radiation doses from these examinations in patients. Compared to the radiation exposure delivered by CT, there have been few reports on the frequency of patients with a cumulative effective radiation dose of ≥100 mSv from repeated PET/CT examinations. The emerging dose tracking system facilitates surveys on patient cumulative doses by PET/CT because it can easily wrap up exposure doses of PET radiopharmaceuticals and CT. Regardless of the use of a dose tracking system, implementation of justification for PET/CT examinations and utilisation of dose reduction measures are key issues in coping with the cumulative dose in patients. Despite all the advantages of PET/MRI such as eliminating radiation exposure from CT and providing good tissue contrast in MRI, it is expensive and cannot be introduced at every facility; thus, it is still necessary to utilise PET/CT with radiation reduction measures in most clinical situations.

scholarly journals Personal Dosimetry Using Monte-Carlo Simulations For Occupational Dose Monitoring In Interventional Radiology: The Results Of A Proof Of Concept In A Clinical Setting

2021 ◽  
Author(s):  
A Almén ◽  
M Andersson ◽  
U O’Connor ◽  
M Abdelrahman ◽  
A Camp ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Interventional Radiology ◽  
Motion Tracking ◽  
Tracking System ◽  
Radiation Doses ◽  
Clinical Environment ◽  
Dose Equivalent ◽  
X Ray ◽  
Dose Monitoring ◽  
Occupational Dose

Abstract Exposure levels to staff in interventional radiology (IR) may be significant and appropriate assessment of radiation doses is needed. Issues regarding measurements using physical dosemeters in the clinical environment still exist. The objective of this work was to explore the prerequisites for assessing staff radiation dose, based on simulations only. Personal dose equivalent, Hp(10), was assessed using simulations based on Monte Carlo methods. The position of the operator was defined using a 3D motion tracking system. X-ray system exposure parameters were extracted from the x-ray equipment. The methodology was investigated and the simulations compared to measurements during IR procedures. The results indicate that the differences between simulated and measured staff radiation doses, in terms of the personal dose equivalent quantity Hp(10), are in the order of 30–70 %. The results are promising but some issues remain to be solved, e.g. an automated tracking of movable parts such as the ceiling-mounted protection shield.

scholarly journals Alteration of medical radiation exposure annual collective effective dose of the population of Tatarstan from 1998 to 2010

2012 ◽  
Vol 93 (5) ◽  
pp. 811-816
Author(s):  
S A Ryzhkin ◽  
S I Ivanov ◽  
M A Patyashina ◽  
R K Ismagilov
Keyword(s):  
Effective Dose ◽  
Exposure Dose ◽  
Radiation Doses ◽  
Prevention Measures ◽  
X Ray ◽  
Medical Radiation ◽  
X Ray Computed ◽  
Medical Radiation Exposure ◽  
Effective Radiation ◽  
Radiological Examinations

Aim. To find out the contemporary principles of collective effective dose of medical radiation formation gained due to medical X-ray and radiological examinations. Methods. Data analysis of radiation and hygiene passports of Republic of Tatarstan territory for the period from 1998 to 2010 was fulfilled. Change of healthcare radiation sources number over time was defined. Number of performed medical X-ray and radiological examinations, average patient’s individual and total effective radiation doses were compared. Results. The number of medical X-ray and radiological examinations increased annually. The rate of different X-ray and radiological examinations as well as gained total effective radiation doses has changed significantly during the analyzed period of time. Use of digital technologies in radiology allowed to decrease average patient’s individual doses to 0.16 mSv for chest photofluorography and to 0.15 mSv for standard X-ray. In recent years, X-ray computed tomography is the largest contribution (40.6%) to the collective effective medical exposure dose of the population. Conclusion. Ionizing radiation use in medical practice remains one of the leading sources of the combined population radiation, primarily due to modern X-ray and radiological examinations; it requires attention and development of special arrangement, technical, prevention measures to decrease unfavorable influence of radiation to population.

EFFECTIVE RADIATION DOSE OF 18F-FDG PET/CT: HOW MUCH DOES DIAGNOSTIC CT CONTRIBUTE?

2019 ◽  
Vol 187 (2) ◽  
pp. 183-190 ◽  
Author(s):  
Yuhao Li ◽  
Lisha Jiang ◽  
Haitao Wang ◽  
Huawei Cai ◽  
Yongzhao Xiang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Total Dose ◽  
Radiation Doses ◽  
Effective Radiation Dose ◽  
Positron Emission ◽  
Pet Ct ◽  
Effective Doses ◽  
Fdg Pet Ct ◽  
Effective Radiation

Abstract The aim was to estimate the effective doses associated with different types of scanning protocols and how much the diagnostic computed tomography (DCT) scan contributed to the total dose of the dual-modality positron emission tomography/computed tomography (PET/CT) examinations. The results showed that an average radiation dose of 8.19 ± 0.83 mSv and 13.44 ± 5.14 mSv for the PET and CT components, respectively, resulting in a total dose of 21.64 ± 5.20 mSv. Approximately 92.7% (980 of 1057) of the patients underwent additional DCT protocols. The DCT protocols contributed 42% of the overall effective radiation doses, which was larger than the percentage contributed by the PET component (38%) and LCT protocols (20%). Reducing the diagnostic area of the DCT scans that patients undergo and decreasing the use of chest-abdomen-pelvis (CAP), abdomen-pelvis (AP) and chest DCT protocols, especially the CAP protocol, will be helpful in decreasing the effective radiation doses of PET/CT scan.

Effective Radiation Doses Received by Medical Personnel During X-Ray Surgery

2005 ◽  
Vol 39 (3) ◽  
pp. 106-109
Author(s):  
L. A. Lebedev ◽  
A. B. Blinov ◽  
D. P. Lobov ◽  
S. G. Mikheenko
Keyword(s):  
Medical Personnel ◽  
Radiation Doses ◽  
X Ray ◽  
Effective Radiation

Radiation Minimisation and Outcome Maximisation in Cardiac Computed Tomograpy

2010 ◽  
Vol 6 (1) ◽  
pp. 15
Author(s):  
James P Earls ◽  
Jonathon A Leipsic ◽  
◽  
Keyword(s):  
Radiation Dose ◽  
Dose Reduction ◽  
New Technologies ◽  
Cardiac Computed Tomography ◽  
Substantial Reduction ◽  
Radiation Doses ◽  
Tube Current ◽  
Prospective Triggering ◽  
Effective Radiation ◽  
Selection Of

Recent reports have raised general awareness that cardiac computed tomography (CT) has the potential for relatively high effective radiation doses. While the actual amount of risk this poses to the patient is controversial, the increasing concern has led to a great deal of research on new CT techniques capable of imaging the heart at substantially lower radiation doses than was available only a few years ago. Methods of dose reduction include optimised selection of user-defined parameters, such as tube current and voltage, as well as use of new technologies, such as prospective triggering and iterative reconstruction. These techniques have each been shown to lead to substantial reduction in radiation dose without loss of diagnostic accuracy. This article will review the most frequently used and widely available methods for radiation dose reduction in cardiac CT and give practical advice on their use and limitations.

Pediatric Minor Head Trauma: Factors Affecting the Anxiety of Parents

2021 ◽  
pp. 000992282110096
Author(s):  
Hasan Aldinc ◽  
Cem Gun ◽  
Serpil Yaylaci ◽  
Erol Barbur
Keyword(s):  
Computed Tomography ◽  
Head Trauma ◽  
Pediatric Patients ◽  
Positive Impact ◽  
Cranial Computed Tomography ◽  
Sufficient Information ◽  
Minor Head Trauma ◽  
Computed Tomography Imaging ◽  
Factors Affecting ◽  
X Ray

Managing the anxiety of the parents of pediatric patients with head trauma is challenging. This study aimed to examine the factors that affect anxiety levels of parents whose children were admitted to the emergency department with minor head trauma. In this prospective study, the parents of 663 consecutive pediatric patients were invited to answer a questionnaire. Parents of 600 children participated in the study. The parents who believed they were provided sufficient information and who were satisfied with the service received had significantly more improvement in anxiety-related questions. Cranial X-ray assessment had a significantly positive impact on the anxiety of the parents, whereas cranial computed tomography and neurosurgery consultation did not. In assessing pediatric minor head trauma, cranial computed tomography imaging and neurosurgery consultation should not be expected to relieve the anxiety of the parents. However, adequately informing them and providing satisfaction are the factors that could lead to improvement.

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