scholarly journals Patient dosimetry in diagnostic radiology

2003 ◽  
Vol 18 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Olivera Ciraj-Bjelac ◽  
Srpko Markovic ◽  
Dusko Kosutic
Keyword(s):  
Survey Data ◽  
Diagnostic Radiology ◽  
Surface Dose ◽  
Reference Levels ◽  
Organ Doses ◽  
X Ray ◽  
Entrance Surface Dose ◽  
National Quality ◽  
Effective Doses ◽  
The Impact

The objective of this work is to assess patient organ doses, effective doses and entrance surface doses in conventional diagnostic radiology procedures for standard adult patient. The survey consists of measurements of doses delivered to 239 patients in nine types of X-ray examinations. Three types of data were collected: X-ray machine data, patient data, and output measurements. Entrance surface dose was assessed based on the survey data and subsequently, using conversion coefficients, the organ doses and effective doses were calculated. Values of the entrance surface dose and the effective dose were estimated to be 0.4 to 5.8 mGy and 0.03 to 3.00 mSv for different examinations. Derived doses were compared with recommended general diagnostic reference levels. The impact of examination parameters on dose values was discussed. Except for posterior-anterior chest examination, all estimated doses are lower than stated reference levels. Survey data are aimed at helping development of national quality control and radiation protection programmed for medical exposures.

RESULTS OF CZECH NATIONAL STUDY OF RADIATION EXPOSURE FROM RADIOTHERAPY OF NON-MALIGNANT DISEASES, IN PARTICULAR OF HEEL SPURS

2019 ◽  
Vol 186 (2-3) ◽  
pp. 386-390
Author(s):  
V Dufek ◽  
H Zackova ◽  
L Kotik ◽  
I Horakova
Keyword(s):  
Czech Republic ◽  
Clinical Practice ◽  
Radiation Exposure ◽  
Effective Dose ◽  
National Study ◽  
Malignant Diseases ◽  
Organ Doses ◽  
The Czech Republic ◽  
X Ray ◽  
Effective Doses

Abstract About 26 000 patients are treated per year with radiotherapy for non-malignant diseases in the Czech Republic. Approximately 75% of them are treated on X-ray therapy units and most of these patients undergo radiotherapy of heel spurs. The evaluation of radiation exposure of these patients was based on measured organ doses and on data from clinical practice. Collective effective doses for particular diagnoses were calculated in order to compare doses resulting from different diagnoses treated on X-ray therapy units. The collective effective dose from radiotherapy of heel spurs in the Czech Republic in 2013 was evaluated to 77 manSv. It represents 25.6% of the total collective effective dose for all diagnoses of radiotherapy for non-malignant diseases treated on X-ray therapy units.

scholarly journals ESTIMATION OF ENTRANCE SURFACE DOSE (ESD) AS A DOSE PROFILE FOR PATIENTS UNDERGOING RADIOGRAPHY EXAMINATION BASED ON TUBE OUTPUT MEASUREMENT

2020 ◽  
Vol 4 (2) ◽  
pp. 72
Author(s):  
Risalatul Latifah ◽  
Muhammad Rosyid ◽  
Firdy Yuana ◽  
Achmad Hidayat
Keyword(s):  
Medical Imaging ◽  
Radiation Exposure ◽  
Reference Level ◽  
Surface Dose ◽  
Diagnostic Reference Level ◽  
Output Measurement ◽  
X Ray ◽  
Dose Profile ◽  
Entrance Surface Dose ◽  
Tube Output

Background: Radiography examinations are the most widely used and indispensable tools in medical imaging. The dose received by the patient should be known to prevent the risk of radiation exposure. Patient dose in radiography examination can be best estimated in terms of entrance surface dose (ESD). ESD value can be obtained by using the recorded dose viewer installed on the device. However,  not all devices have this feature. Other methods can be conducted using thermoluminescence dosimeter (TLD) although it practically requires a high cost. Purpose: The study aims to estimate the ESD as a dose profile for patients undergoing radiography examination using tube output. Method: The patient data and exposure factors were retrospectively recorded for 263 patients. The ESD was estimated from the measurements of the X-ray tube output and recorded exposure factors.  Results: The ESD value varied from 0.002 to 0.41 mGy. In the thorax PA, thorax LAT, cervical LAT, cervical AP, skull AP, skull LAT, genu LAT and waters was found (0,23±0.05) mGy, (0,09±0,05) mGy, (0,07±0,04) mGy, (0,13±0,08) mGy, (0,03±0,01) mGy, (0,06±0,02) mGy, (0,04±0,00) mGy (0,04±0,02) mGy, respectively. These results were further used to determine the Local Diagnostic Reference Level (LDRL) value. Conclusion:  The results revealed that LDRL fell below the national DRL value and international reference

Development of a scintillating fiber-optic dosimeter for measuring the entrance surface dose in diagnostic radiology

2013 ◽  
Vol 48 ◽  
pp. 29-34 ◽  
Author(s):  
Wook Jae Yoo ◽  
Dayeong Jeon ◽  
Jeong Ki Seo ◽  
Sang Hun Shin ◽  
Ki-Tek Han ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Diagnostic Radiology ◽  
Surface Dose ◽  
Entrance Surface Dose ◽  
Scintillating Fiber

scholarly journals Diagnostic Reference Levels for Diagnostic and Interventional X-Ray Procedures in Germany: Update and Handling

2019 ◽  
Vol 191 (08) ◽  
pp. 739-751 ◽  
Author(s):  
Alexander Schegerer ◽  
Reinhard Loose ◽  
Lothar J. Heuser ◽  
Gunnar Brix
Keyword(s):  
Diagnostic Reference Levels ◽  
Reference Levels ◽  
X Ray ◽  
Key Points ◽  
Recent Developments ◽  
Local Reference ◽  
Patient Size ◽  
Effective Doses ◽  
Dose Management ◽  
The Individual

Purpose Recent developments in medical technology have broadened the spectrum of X-ray procedures and changed exposure practice in X-ray facilities. For this reason, diagnostic reference levels (DRLs) for diagnostic and interventional X-ray procedures were updated in 2016 and 2018, respectively. It is the aim of this paper to present the procedure for the update of the DRLs and to give advice on their practical application. Materials and Methods For the determination of DRLs, data from different independent sources that collect dose-relevant data from different facilities in Germany were considered. Seven different weight intervals were specified for classifying pediatric X-ray procedures. For each X-ray procedure considered, the 25th, 50th, and 75th percentile of the respective national distribution of the dose-relevant parameters were determined. Additionally, effective doses that correspond to the DRLs were estimated. Results In procedures with already existing DRLs before 2016, the values were lowered by circa 20 % on average. Numerous DRLs were established for the first time (9 for interventional procedures, 10 for CT examinations). Conclusion For dose optimizations even below the new national DRLs, the BfS recommends establishing local reference levels, using dose management software (particularly in CT and interventional radiology), adapting dose-relevant parameters of X-ray protocols to the individual patient size, and establishing internal radiation protection teams responsible for optimizing X-ray procedures in clinical practice. When applying good medical practice and using modern equipment, the median dose values of the nationwide dose distributions can not only be easily achieved but can even be undercut. Key Points: Citation Format

scholarly journals Effectiveness of Al2O3:C OSL dosimeter towards entrance surface dose measurement in common X-ray diagnostics

2019 ◽  
Vol 165 ◽  
pp. 108418 ◽  
Author(s):  
Y. Musa ◽  
S. Hashim ◽  
S.K. Ghoshal ◽  
N.E. Ahmad ◽  
D.A. Bradley ◽  
...  
Keyword(s):  
Surface Dose ◽  
Dose Measurement ◽  
X Ray ◽  
Entrance Surface Dose ◽  
Osl Dosimeter
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