Dose-area product measurements and determination of conversion coefficients for the estimation of effective dose in dental lateral cephalometric radiology

2007 ◽  
Vol 124 (2) ◽  
pp. 181-186 ◽  
Author(s):  
H. K. Looe ◽  
F. Eenboom ◽  
N. Chofor ◽  
A. Pfaffenberger ◽  
M. Sering ◽  
...  
Keyword(s):  
Effective Dose ◽  
Dose Area Product ◽  
Conversion Coefficients ◽  
Area Product

scholarly journals A review of dental cone-beam CT dose conversion coefficients

2020 ◽  
pp. 20200225
Author(s):  
Eugene Mah ◽  
E Russell Ritenour ◽  
Hai Yao
Keyword(s):  
Effective Dose ◽  
Cone Beam Ct ◽  
Field Of View ◽  
Cone Beam ◽  
Tube Voltage ◽  
Conversion Factors ◽  
Dose Area Product ◽  
Ct Dose ◽  
Conversion Coefficients ◽  
Area Product

Objective: The purpose of this study was to review the literature to examine the usage and magnitude of effective dose conversion factors (DCE) for dental cone beam CT (CBCT) scanners. Methods: A PubMed literature search for publications relating to radiation dosimetry in dental radiography was performed. Papers were included if they reported DCE, or reported ICRP 103 effective dose and dose-area product. 71 papers relating to dental CBCT dosimetry were found, of which eight reported effective dose conversion factors or provided enough information to calculate dose conversion factors. Scanner model, effective dose, dose-area product, tube voltage, field of view size and DCE were extracted from the papers for analysis. Results: DCE values ranged from 0.035 to 0.31 µSv/mGy-cm2 with a mean of 0.129 µSv/mGy-cm2 (SD = 0.056). When categorized into small (<100 cm2), medium (100–225 cm2) and large (>225 cm2) fields of view (FOV), linear fits to the effective dose and dose-area product yielded slopes of 0.129, 0.111 and 0.074 µSv/mGy-cm2 for small, medium and large FOVs respectively. Conclusion: The range of reported DCE values and spread with respect to field of view category suggests that DCE values that depend on FOV would provide more accurate effective dose estimates. Tube voltage was found to be a smaller factor in determining DCE. Reasonable values for DCE taking into account FOV size were obtained. There is considerable room for more work to be done to examine the behaviour of DCE with changes to patient age and dental CBCT imaging parameters.

Dose-Area Product–to–Effective Dose Conversion Coefficients for Pelvic Radiography Using a Monte Carlo Program

2020 ◽  
Vol 215 (3) ◽  
pp. 679-684 ◽  
Author(s):  
David S. Chen ◽  
Eva M. Escobedo ◽  
Jonathan G. Eastman ◽  
Joshua D. Bloomstein ◽  
Sandra L. Taylor ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Effective Dose ◽  
Monte Carlo Program ◽  
Dose Area Product ◽  
Conversion Coefficients ◽  
Pelvic Radiography ◽  
Area Product

scholarly journals Supplements and adjustments to the method of the assessment of the effective dose from the external exposure of the patients

2019 ◽  
Vol 12 (3) ◽  
pp. 120-132
Author(s):  
V. Yu. Golikov ◽  
L. A. Chipiga ◽  
A. V. Vodovatov ◽  
S. S. Sarycheva
Keyword(s):  
Computed Tomography ◽  
Effective Dose ◽  
Pediatric Patients ◽  
Experimental Studies ◽  
Whole Body ◽  
Published Data ◽  
X Ray ◽  
Dose Area Product ◽  
Conversion Coefficients ◽  
Area Product

The current study was aimed at the justification and proposal of the supplements and corrections that are planned for the implementation in the updated version of the Methodical guidelines “Control of the effective doses of the patients from the X-ray examinations” (MU 2.6.1.2944-11). This study included estimation and/ or update of the values of the conversion coefficients from measurable dose characteristics (entrance-surface dose, dose-area product) to the effective dose for various X-ray examinations. Estimation of the updated conversion coefficients was based both on the home analytical and experimental studies based on the modern protocols of the X-ray examinations, and the results of the published data. Updated values of the conversion coefficients were presented for: fluoroscopic examinations of the gastro-intestinal tract with barium media for adult and pediatric patients; interventional examinations of the adult patients; computed tomography examinations for adult and pediatric patients; dental intraoral examinations. For the first time, the methods of the estimation of the effective dose and corresponding conversion coefficients were presented for: computed tomography of the extremities, whole body, scan of several anatomic regions; angiographic examinations of the heart vessels of the pediatric patients of different age categories; slot-scanning X-ray examinations; bone densitometry.

scholarly journals ESTIMATION OF THE CONVERSION COEFFICIENTS FROM DOSE-AREA PRODUCT TO EFFECTIVE DOSE FOR BARIUM MEAL EXAMINATIONS FOR ADULT PATIENTS

2018 ◽  
Vol 11 (1) ◽  
pp. 93-100 ◽  
Author(s):  
A. V. Vodovatov ◽  
V. Yu. Golikov ◽  
I. G. Kamyshanskaya ◽  
K. V. Zinkevich ◽  
Ch. Bernhardsson
Keyword(s):  
Effective Dose ◽  
Barium Meal ◽  
Adult Patients ◽  
Dose Area Product ◽  
Conversion Coefficients ◽  
Area Product

ESTIMATION OF ORGAN DOSES AND EFFECTIVE DOSES BASED ON IN-PHANTOM DOSIMETRY FOR PAEDIATRIC DIAGNOSTIC CARDIAC CATHETERISATION

2019 ◽  
Vol 185 (2) ◽  
pp. 215-221
Author(s):  
Toshio Kawasaki ◽  
Masami Sakakubo ◽  
Kanako Ito ◽  
Ai Kitagawa
Keyword(s):  
Effective Dose ◽  
Cardiac Catheterization ◽  
Organ Doses ◽  
Conversion Factors ◽  
Dose Area Product ◽  
Diagnostic Cardiac Catheterization ◽  
Pediatric Dosimetry ◽  
Effective Doses ◽  
Area Product ◽  
Cardiac Catheterizations

Abstract The present study evaluated the organ doses, effective doses and conversion factors from the dose–area product to effective dose in pediatric diagnostic cardiac catheterization performed by in-phantom dosimetry and Monte Carlo simulation. The organ and effective doses in 5-y-olds during diagnostic cardiac catheterizations were evaluated using radiophotoluminescence glass dosemeters implanted into a pediatric anthropomorphic phantom and PCXMC software. The mean effective dose was 3.8 mSv (range: 1.8–7.5 mSv). The conversion factors from the dose–area product to effective dose were 0.9 and 1.6 mSv (Gy cm2)−1 for posteroanterior and lateral fluoroscopy, respectively, and 0.9 and 1.5 mSv (Gy cm2)−1 for posteroanterior and lateral cineangiography, respectively. Effective doses evaluated using the pediatric dosimetry system agreed with those obtained using PCXMC software within 12%. The dose data and conversion factors evaluated may guide the estimation of exposure doses in children undergoing diagnostic cardiac catheterization.

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