scholarly journals Tables for effective dose assessment from diagnostic radiology (period 1946–1995) in epidemiologic studies

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0248987
Author(s):  
Merle Friederike Meiboom ◽  
Wolfgang Hoffmann ◽  
Kerstin Weitmann ◽  
Heiner von Boetticher
Keyword(s):  
Bone Marrow ◽  
Effective Dose ◽  
Retrospective Analysis ◽  
Epidemiological Studies ◽  
Epidemiologic Studies ◽  
Diagnostic Radiology ◽  
Dose Assessment ◽  
Red Bone Marrow ◽  
Dose Area Product ◽  
Area Product

Diagnostic radiology is a leading cause of man-made radiation exposure to the population. It is an important factor in many epidemiological studies as variable of interest or as potential confounder. The effective dose as a risk related quantity is the most often stated patient dose. Nevertheless, there exists no comprehensive quantification model for retrospective analysis for this quantity. This paper gives a catalog of effective dose values for common and rare examinations and demonstrates how to modify the dose values to adapt them to different calendar years using a quantification concept already used for retrospective analysis of the red bone marrow dose. It covers the time period of 1946 to 1995 and allows considering technical development and different practical standards over time. For an individual dose assessment, if the dose area product is known, factors are given for most examinations to convert the dose area product into the effective dose. Additionally factors are stated for converting the effective dose into the red bone marrow dose or vice versa.

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

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.

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 Evaluation of Patient's Dose and Estimate of Cancer Risk in Electrophysiology Studies and Ablation in Cath Lab Center of Afshar Hospital, Yazd, Iran

2020 ◽  
Author(s):  
Fatollah Bouzarjomehri ◽  
Fereshteh Omidvar ◽  
Mohammad Hossein Zare ◽  
Mashallah Nakhaeine Nejad
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Absorbed Dose ◽  
Image Intensifier ◽  
Time Range ◽  
Cross Sectional ◽  
Dose Area Product ◽  
The Mean ◽  
Area Product ◽  
Risk Of Cancer

Introduction: Today electrophysiology studies and ablation have been developed due to increasing arrhythmias disorder of heart. In these diagnostic – treatments methods, the use of fluoroscopy can be causes patient radiation dose, therefore evaluation of patient's absorbed dose is necessary to protection of the radiation. The aim of this study was to evaluate the absorbed dose in patients undergoing electrophysiology and cardiac ablation and to estimate their risk of cancer in Yazd Afshar Hospital. Methods: This study was a cross-sectional study. In this study, the mean absorbed dose of referral patients for electrophysiology studies and ablation had been measured in the cat. Lab of Afshar Hospital, Yazd. The dosimeter had been used in this research was KAP meter, the M4 DIAMENTOR made in Germany that was able to measure dose-area product and time of the fluoroscopy. The patient effective dose was calculated by the PCXMC software from dose-area product. Results: The mean dose-area in ablation and electrophysiology studies was respectively 153.34±105.32 and 5.62 14.88 Gy.cm2 and the radiation time range was recorded 3.32 to 68.65 minutes and 1.03 to 6.28 minutes, respectively. The mean effective dose of ablation and electrophysiology studies were respectively 16.38 and 1.65 mSv. The cancer risk per ten thousands of patients, who were under the ablation and electrophysiology examinations were estimated 13 and 1.3 people, respectively. Conclusion: Increasing of patient dose due to ablation in this study relation to the other studies can be due to long old of image intensifier device.

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