Influence of exposure and geometric parameters on absorbed doses associated with common neuro-interventional procedures
| Autor: | Kwan Hoong Ng, M. J. Safari, Jeannie Hsiu Ding Wong, Dean L Cutajar, Wei Loong Jong, Nathan Thorpe, Anatoly B. Rosenfeld |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Models
Anatomic medicine.medical_specialty Biophysics General Physics and Astronomy Magnification Radiology Interventional Radiation Dosage Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences Radiation Protection 0302 clinical medicine medicine Humans Radiology Nuclear Medicine and imaging Radiation Injuries Eye lens Phantoms Imaging business.industry Radiation dose General Medicine Surface distance Fluoroscopy 030220 oncology & carcinogenesis Radiological weapon Anthropomorphic phantom Dose reduction Radiology business Nuclear medicine Head |
| Zdroj: | Physica Medica. 35:66-72 |
| ISSN: | 1120-1797 |
| DOI: | 10.1016/j.ejmp.2017.02.002 |
| Popis: | Purpose The purpose of this study was to investigate the effects of routine exposure parameters on patient’s dose during neuro-interventional radiology procedures. Methods We scrutinized the routine radiological exposure parameters during 58 clinical neuro-interventional procedures such as, exposure direction, magnification, frame rate, and distance between image receptor to patient’s body and evaluate their effects on patient’s dose using an anthropomorphic phantom. Radiation dose received by the occipital region, ears and eyes of the phantom were measured using MOSkin detectors. Results DSA imaging technique is a major contributor to patient’s dose (80.9%) even though they are used sparingly (5.3% of total frame number). The occipital region of the brain received high dose largely from the frontal tube constantly placed under couch (73.7% of the total KAP). When rotating the frontal tube away from under the couch, the radiation dose to the occipital reduced by 40%. The use of magnification modes could increase radiation dose by 94%. Changing the image receptor to the phantom surface distance from 10 to 40 cm doubled the radiation dose received by the patient’s skin at the occipital region. Conclusion Our findings provided important insights into the contribution of selected fluoroscopic exposure parameters and their impact on patient’s dose during neuro-interventional radiology procedures. This study showed that the DSA imaging technique contributed to the highest patient’s dose and judicial use of exposure parameters might assist interventional radiologists in effective skin and eye lens dose reduction for patients undergoing neuro-interventional procedures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect