Radiation exposure of interventional cardiologists for different types of procedures in catheterization lab, is it more concern about extremities?

2020 ◽  
Vol 55 (3) ◽  
pp. 187-194
Author(s):  
A. Asgari ◽  
A.A. Parach ◽  
E. Daneshian ◽  
Z. Nekoofar ◽  
F. Bouzarjomehri ◽  
...  
Keyword(s):  
Absorbed Dose ◽  
Skin Dose ◽  
High Dose ◽  
Direct Role ◽  
Left Wrist ◽  
X Ray ◽  
Left Chest ◽  
Entrance Skin Dose ◽  
Different Types ◽  
High Level

Introduction: Angiography and angioplasty expose cardiologists to a high level of X-ray comparing other radiographic methods, due to the high dose of radiation and the presence of the physician beside the patient bed during the procedure. Therefore, this study was designed to measure the absorbed dose in some important organs and extremities in cardiologists during different angiography and angioplasty procedures in catheterization lab. Methods: The entrance skin dose and extremity absorbed dose of the physicians in 100 angiography and angioplasty procedures were measured by TLD chips. The points on the physicians’ body, which were measured in this study, included: thyroid, right and left chest, right and left wrists, and left leg. The correlation of entrance skin dose in these six points to the exposure parameters is also evaluated. Results: The left leg has maximum dose and maximum correlation with total DAP for all three physicians in all procedure types. There was a weak correlation between left wrist absorbed dose and number of views among three physicians. Also, the maximum annual absorbed dose of the physicians in the left leg was lower than 150 mSv. Conclusion: According to the results of this study, it can be stated that periodic leg and hand dosimetry during operation is necessary for interventional cardiologists. Results also showed that, regardless of the type of procedure, the characteristics of device output, especially DAP, have a direct role in the absorbed dose of the organs and extremities, especially those outside the shield.

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 Comparison of six phantoms for entrance skin dose evaluation in 11 standard X-ray examinations

2005 ◽  
Vol 6 (1) ◽  
pp. 101-113 ◽  
Author(s):  
Gaetano Compagnone ◽  
Laura Pagan ◽  
Carlo Bergamini
Keyword(s):  
Skin Dose ◽  
X Ray ◽  
Dose Evaluation ◽  
Entrance Skin Dose

REDUCING ABSORBED DOSE TO THYROID IN NECK CT EXAMINATIONS: THE EFFECTS OF SABA SHIELDING

2020 ◽  
Vol 191 (3) ◽  
pp. 349-360
Author(s):  
Valiallah Saba ◽  
Jalal Kargar Shuraki ◽  
Abdollah Valizadeh ◽  
Mohsen Zahedinia ◽  
Maziar Barkhordari
Keyword(s):  
Image Quality ◽  
American Association ◽  
Absorbed Dose ◽  
Skin Dose ◽  
Radiation Attenuation ◽  
Patient Study ◽  
Entrance Skin Dose ◽  
Radiosensitive Organs ◽  
Attenuation Values

Abstract Bi shielding has been used for the protection of radiosensitive organs during computed tomography (CT) for 20 years. In 2017, American Association of Physicists in Medicine recommended against Bi shielding due to its degrading effects on image quality. Saba shielding introduced recently protecting organs as Bi shielding without degrading image quality. In this study, the Saba shield was modified and primary radiation attenuation values of the shields and entrance skin dose (ESD) on the thyroid were measured with and without shielding. Furthermore, the quality of images obtained using Saba shielding was investigated quantitatively and qualitatively. Saba and Bi shielding reduced the ESD on the thyroid by about 50%. Saba shielding had about 5–7 HU less noise and about 51–65 HU less CT numbers shift in comparison with Bi shielding at a distance of 1 cm from the shields. Saba shielding had no degrading effects on image quality in the patient study.

scholarly journals Evaluation of dose parameters defining the probability of deterministic effects in the skin of patients undergoing interventional radiological examinations

2020 ◽  
Vol 13 (3) ◽  
pp. 77-86
Author(s):  
S. S. Sarycheva
Keyword(s):  
Absorbed Dose ◽  
Dose Assessment ◽  
Field Size ◽  
Skin Dose ◽  
Operation Technique ◽  
Representative Point ◽  
High Dose ◽  
Dose Area Product ◽  
Area Product ◽  
Radiological Examinations

The study is devoted to the assessment of dose parameters determine the probability of deterministic effects in the skin for patients undergoing high-dose interventional radiological examinations. Particular attention is paid to the analysis of the geometry of the absorbed dose distribution over the patient’s skin for the main types of interventional examinations. The aim of this study was to clarify the methodology for assessment of the maximum absorbed dose in the patients’ skin, taking into account new data. The data collection was carried out in nine city hospitals from Sankt-Petersburg; detailed information about more than 400 procedures was obtained. The data about operation technique for the main types of interventional examinations, physical, technical, geometric and dosimetric parameters for each procedure were registered. Based on the statistical data on distribution of geometric procedure parameters (fields size and projections) possible localizations and values of the absorbed dose in certain areas of the patients’ skin were determined. An updated methodology for skin dose assessment based on the recorded dosimetric value of dose area product considering the radiation fields size was presented. As an alternative, an estimation of the maximum skin dose based on the cumulative air kerma at the patient’s reference point – «representative» point for the patient’s skin considering the tube rotation was proposed. This method does not require the information on used field size. The conservative conversion coefficients from the measured dosimetric values to the peak skin dose and trigger values to prevent deterministic effects in the patients’ skin were calculated.

scholarly journals CARACTERIZAÇÃO ESTRUTURAL DA SÍLICA PROVENIENTE DA CINZA DO BAGAÇO DA CANA

2018 ◽  
Vol 10 (2) ◽  
pp. 07-11
Author(s):  
Luma Freitas Corrêa ◽  
Daniel Ângelo Macena ◽  
Jaqueline Nascimento da Silva ◽  
Diego Ariça Cecatto
Keyword(s):  
Silicon Dioxide ◽  
New Products ◽  
Sugar Cane Bagasse ◽  
New Materials ◽  
Finite Product ◽  
X Ray ◽  
Different Types ◽  
Sugar Cane Bagasse Ash ◽  
High Level ◽  
Acid Treatments

The silicon or silicon dioxide (SIO2) it's a natural compost that is the most used as the percursorof new materials. With a high level of crystallinity, it can be very usefull inside the elaboration of new products. As a finite product, there is a need to comply the demands in altenate ways. The current work comes up with an ash characterization that is provided from the sugar cane bagasse ash and the production of a material that presents an higher level of crystallinity. The characterization was maide thrugh the diffraction of an X-Ray after samples being submits inside different acid treatments and calcination. The diffractograms analyses demonstrate that it was possible to achieve the Alpha-Quatrz that presents an higher crystallinity with a comparison to the samples that were not receveing the treatment, proving this way, that thermal and acid treatments were effective. Beyond, the material obtains the utilization on different types of following up.

scholarly journals Fundamental Study of nanoDot OSL Dosimeters for Entrance Skin Dose Measurement in Diagnostic X-ray Examinations

2016 ◽  
Vol 41 (3) ◽  
pp. 229-236 ◽  
Author(s):  
Tohru Okazaki ◽  
Hiroaki Hayashi ◽  
Kazuki Takegami ◽  
Hiroki Okino ◽  
Natsumi Kimoto ◽  
...  
Keyword(s):  
Skin Dose ◽  
Dose Measurement ◽  
Fundamental Study ◽  
X Ray ◽  
Entrance Skin Dose
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