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| Content Provider | Springer Nature Link |
|---|---|
| Author | Toossi, Mohammad Taghi Bahreyni Mehrpouyan, Mohammad Nademi, Hossein Fardid, Reza |
| Copyright Year | 2014 |
| Abstract | This study is an effort to propose a mathematical relation between the occupational exposure measured by a dosimeter worn on a lead apron in the chest region of a cardiologist and the dose area product (DAP) recorded by a meter attached to the X-ray tube. We aimed to determine factors by which DAP values attributed to patient exposure could be converted to the over-apron entrance surface air kerma incurred by cardiologists during an angiographic procedure. A Rando phantom representing a patient was exposed by an X-ray tube from 77 pre-defined directions. DAP value for each exposure angle was recorded. Cardiologist exposure was measured by a Radcal ionization chamber 10X5-180 positioned on a second phantom representing the physician. The exposure conversion factor was determined as the quotient of over apron exposure by DAP value. To verify the validity of this method, the over-apron exposure of a cardiologist was measured using the ionization chamber while performing coronary angiography procedures on 45 patients weighing on average 75 ± 5 kg. DAP values for the corresponding procedures were also obtained. Conversion factors obtained from phantom exposure were applied to the patient DAP values to calculate physician exposure. Mathematical analysis of our results leads us to conclude that a linear relationship exists between two sets of data: (a) cardiologist exposure measured directly by Radcal & DAP values recorded by the X-ray machine system (R $^{2}$ = 0.88), (b) specialist measured and estimated exposure derived from DAP values (R $^{2}$ = 0.91). The results demonstrate that cardiologist occupational exposure can be derived from patient data accurately. |
| Starting Page | 83 |
| Ending Page | 91 |
| Page Count | 9 |
| File Format | |
| ISSN | 01589938 |
| Journal | Australasian Physics & Engineering Sciences in Medicine |
| Volume Number | 38 |
| Issue Number | 1 |
| e-ISSN | 18795447 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2014-12-28 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Interventional cardiology Entrance surface air kerma (ESAK) Over apron exposure Cardiologist DAP Biomedicine general Biophysics and Biological Physics Medical and Radiation Physics Biomedical Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Physics and Astronomy Biophysics Biomedical Engineering |
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