Chest X-rays of newborns in a medical facility: variation between the entrance skin dose measurements using the indirect and direct methods for clinical dose audit

2021 ◽  
Author(s):  
Akintayo Daniel Omojola ◽  
Michael Onoriode Akpochafor ◽  
Samuel Olaolu Adeneye ◽  
Isiaka Olusola Akala ◽  
Azuka Anthonio Agboje
Keyword(s):  
Direct Methods ◽  
Skin Dose ◽  
Medical Facility ◽  
X Rays ◽  
Clinical Dose ◽  
Entrance Skin Dose ◽  
Dose Measurements

Characterization of a cable-free system based on p-type MOSFET detectors for “in vivo ” entrance skin dose measurements in interventional radiology

2012 ◽  
Vol 39 (8) ◽  
pp. 4866-4874 ◽  
Author(s):  
Maria Daniela Falco ◽  
Marco D'Andrea ◽  
Lidia Strigari ◽  
Daniela D'Alessio ◽  
Francesco Quagliani ◽  
...  
Keyword(s):  
Interventional Radiology ◽  
Skin Dose ◽  
Free System ◽  
Entrance Skin Dose ◽  
P Type ◽  
Dose Measurements

scholarly journals Assessment of the Local Exposure Level during Adult Chest X-Rays at the Ngaoundere Regional Hospital, Cameroon

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Guiswe Gnowe ◽  
Henri Paul Ekobena Fouda ◽  
Mbo Amvene Jéremie ◽  
Takmou Pascal ◽  
Bonaventure Babinne Graobe
Keyword(s):  
Adult Patients ◽  
Reference Level ◽  
Skin Dose ◽  
Exposure Level ◽  
X Rays ◽  
Entrance Skin Dose ◽  
Chest Examination ◽  
Local Exposure ◽  
Skin Doses

Background. The purpose of this study was to estimate the doses delivered to adult patients during chest examination for comparison with those elsewhere and to establish a local diagnostic reference level for the chest. The doses delivered in the standard X-ray examinations are not sufficiently optimized and controlled. The working protocols for the same exam given differ for similar morphotypes within the same hospital structure. Materials and Methods. The entrance skin dose (mGy) of the chest was evaluated on 105 adult patients with a mass of 70 ± 10 kg in accordance with the 75th percentile of the irradiation parameters. The analysis and processing of the data was carried out by Excel 2010. The entrance skin dose of the chest obtained in mGy was 0.18 ± 0.21 for the PA incidence. Conclusion. The present study allowed us to observe large variations at the entrance skin doses of the chest. These variations have made it possible to understand that the entrance skin doses to the chest are optimized and do not exceed the proportions of those estimated by others and standards internationally. This aspect demonstrates that the diagnostic reference levels as enumerated are dependent on the doses delivered and include not only the notions of quality of the radiographic image and the quality assurance of the radiological equipments but also the level of the manipulators trained.

Characteristics of dosemeter types for skin dose measurements in practice

2005 ◽  
Vol 117 (1-3) ◽  
pp. 185-189 ◽  
Author(s):  
J. Van Dam ◽  
H. Bosmans ◽  
G. Marchal ◽  
A. Wambersie
Keyword(s):  
Skin Dose ◽  
Dose Measurements

scholarly journals Measurement of Entrance Skin Dose and Calculation of Effective Dose for Common Diagnostic X-Ray Examinations in Kashan, Iran

2015 ◽  
Vol 7 (5) ◽  
Author(s):  
Akbar Aliasgharzadeh ◽  
Ehsan Mihandoost ◽  
Mahboubeh Masoumbeigi ◽  
Morteza Salimian ◽  
Mehran Mohseni
Keyword(s):  
Effective Dose ◽  
Skin Dose ◽  
X Ray ◽  
Entrance Skin Dose

scholarly journals The use of fricke dosimetry for low energy x-rays

2006 ◽  
Vol 49 (spe) ◽  
pp. 17-23 ◽  
Author(s):  
Carlos de Austerlitz ◽  
Viviane Souza ◽  
Heldio Pereira Villar ◽  
Aloisio Cordilha
Keyword(s):  
Ionization Chamber ◽  
Parallel Plate ◽  
Low Energy ◽  
Calibration Factor ◽  
X Rays ◽  
Measuring Systems ◽  
X Ray ◽  
Dose Measurements

The performance of four X-ray qualities generated in a Pantak X-ray machine operating at 30-100 kV was determined with a parallel-plate ionization chamber and a Fricke dosimeter. X-ray qualities used were those recommended by Deutsch Internationale Normung DIN 6809 and dose measurements were carried out with Plexiglas® simulators. Results have shown that the Fricke dosimeter can be used not only for soft X-ray dosimetry, but also for the maintenance of low-energy measuring systems' calibration factor.

scholarly journals Remote control of neural function by X-ray-induced scintillation

2019 ◽  
Author(s):  
Takanori Matsubara ◽  
Takayuki Yanagida ◽  
Noriaki Kawaguchi ◽  
Takashi Nakano ◽  
Junichiro Yoshimoto ◽  
...  
Keyword(s):  
Dopamine Neurons ◽  
Neural Function ◽  
X Rays ◽  
Cellular Functions ◽  
X Ray ◽  
Functional Studies ◽  
Clinical Dose ◽  
Visible Luminescence ◽  
Midbrain Dopamine ◽  
The Brain

Scintillators emit visible luminescence when irradiated with X-rays. Given the unlimited tissue penetration of X-rays, the employment of scintillators could enable remote optogenetic control of neural functions at any depth of the brain. Here we show that a yellow-emitting inorganic scintillator, Ce-doped Gd3(Al,Ga)5O12 (Ce:GAGG), could effectively activate red-shifted excitatory and inhibitory opsins, ChRmine and GtACR1, respectively. Using injectable Ce:GAGG microparticles, we successfully activated and inhibited midbrain dopamine neurons in freely moving mice by X-ray irradiation, producing bidirectional modulation of place preference behavior. Ce:GAGG microparticles were non-cytotoxic and biocompatible, allowing for chronic implantation. Pulsed X-ray irradiation at a clinical dose level was sufficient to elicit behavioral changes without reducing the number of radiosensitive cells in the brain and bone marrow. Thus, scintillator-mediated optogenetics enables less invasive, wireless control of cellular functions at any tissue depth in living animals, expanding X-ray applications to functional studies of biology and medicine.

Sign in / Sign up

Export Citation Format

Share Document