Occupational Exposure in Pediatric Cardiac Catheterization

Lb, Li; M, Kai; Takano, Kunihiko; Ikeda, Sachiko; Matsuura, M.; Kusama, Tomoko

doi:10.1097/00004032-199508000-00011

Cited by 23 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carinou et al (2015) recently provided a comprehensive review of literature pertaining to the relationship between eye lens dose and externally monitored exposure. Several prior studies reported externally monitored dose to eye lens dose conversion factors in the range 0.44-0.87 for interventional cardiology and/or radiology procedures (Janssen et al 1992, Li et al 1995, Vañó et al 1998, Kicken et al 1999, Covens et al 2007, Lie et al 2008, Sánchez et al 2016. The current work compares favorably with this prior work, with percent LCD values for the left eye in the range 59%-72% and for the right eye in the range 22%-27%.…”

Section: Discussionmentioning

confidence: 59%

Estimating head and neck tissue dose from x-ray scatter to physicians performing x-ray guided cardiovascular procedures: a phantom study

et al. 2016

View full text Add to dashboard Cite

Physicians performing x-ray guided interventional procedures have a keen interest in radiation safety. Radiation dose to tissues and organs of the head and neck are of particular interest because they are not routinely protected by wearable radiation safety devices. This study was conducted to facilitate estimation of radiation dose to tissues of the head and neck of interventional physicians based on the dose recorded by a personal dosimeter worn on the left collar. Scatter beam qualities maximum energy and HVL were measured for 40 scatter beams emitting from an anthropomorphic patient phantom. Variables of the scatter beams included scatter angle (35° and 90°), primary beam peak tube potential (60, 80, 100, and 120 kVp), and 5 Cu spectral filter thicknesses (0-0.9 mm). Four reference scatter beam qualities were selected to represent the range of scatter beams realized in a typical practice. A general radiographic x-ray tube was tuned to produce scatter-equivalent radiographic beams and used to simultaneously expose the head and neck of an anthropomorphic operator phantom and radiochromic film. The geometric relationship between the x-ray source of the scatter-equivalent beams and the operator phantom was set to mimic that between a patient and physician performing an invasive cardiovascular procedure. Dose to the exterior surface of the operator phantom was measured with both 3 × 3 cm pieces of film and personal dosimeters positioned at the location of the left collar. All films were scanned with a calibrated flatbed scanner, which converted the film's reflective density to dose. Films from the transverse planes of the operator phantom provided 2D maps of the dose distribution within the phantom. These dose maps were normalized by the dose at the left collar, providing 2D percent of left collar dose (LCD) maps. The percent LCD maps were overlain with bony anatomy CT images of the operator phantom and estimates of percent LCD to the left, right and whole brain, brain stem, lenses of the eyes, and carotid arteries were calculated. Per expectation, results indicated greater percent dose to superficial versus deep tissues and increasing percent dose to deep tissues with increasing scatter-equivalent beam energy and HVL. The results enable estimation of the scatter dose to tissues of the head and neck of interventional physicians based on occupational dose measured by a personal dosimeter worn at the collar outside the protective apron.

show abstract

Section: Discussionmentioning

confidence: 59%

Estimating head and neck tissue dose from x-ray scatter to physicians performing x-ray guided cardiovascular procedures: a phantom study

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Radiation protection for medical personnel is the standard of care for procedures involving ionizing radiation, and this topic has been extensively investigated 9–21 . Although there has been a decrease in the occupational radiation dose for most medical workers, the areas of cardiovascular and interventional radiology appear to be exceptions 1 , 9 .…”

Section: Discussionmentioning

confidence: 99%

Use of a Sterile, Disposable, Radiation‐Absorbing Shield Reduces Occupational Exposure to Scatter Radiation During Pectoral Device Implantation

Simons

Orrison

2004

Pacing Clinical Electrophis

View full text Add to dashboard Cite

The aim of this study was to demonstrate the effectiveness of a radiation-absorbing shield in reducing physicians' occupational radiation exposure during pectoral device implantation. A sterile, disposable, lead-free radiation-absorbing surgical drape containing x-ray attenuation material was evaluated. Twenty procedures used the radiation absorbing drape, and 20 were performed without the shielding. Radiation exposure was measured using thermoluminescent dosimetry collar badges. Use of the protective shield was associated with a time adjusted 80% reduction in radiation dose (0.009 mrem/s with shielding vs 0.047 mrem/s without shielding, P < 0.05) to the physician performing the procedures. The radiation-absorbing surgical drape did not interfere with technical performance nor add procedural time, and all procedures were successfully completed. This study demonstrates that a sterile, disposable, radiation-absorbing drape provides a convenient means of augmenting conventional radiation shielding. Use of this protective shielding greatly reduces operators' occupational exposure to scatter radiation during pectoral device implantation without compromising sterility or procedural technique.

show abstract

Staff Radiation Doses in Interventional Cardiology: Correlation With Patient Exposure

et al. 2009

View full text Add to dashboard Cite

In pediatric interventional cardiology, cardiologists need to stay closer to the patient than during adult catheterization, and the use of biplane systems increases the scatter radiation. Occupational radiation risk is rather high, and estimation of lens doses becomes necessary. Deriving factors for assessing these doses from the patient doses displayed in catheterization laboratories can help in preserving staff radiation safety. A biplane X-ray system and polymethylmethacrylate plates of 4 to 20 cm to simulate pediatric patients have been used. Patient entrance dose rates, dose-area product, and doses to the eyes of the cardiologists for the typical operation modes have been measured. Correlations between patient and staff doses have been obtained. Scatter dose rates increase by a factor of 92 from low fluoroscopy to cine acquisition when phantom thickness increases from 4 to 20 cm. Scatter doses increase linearly with dose-area product for all the thicknesses. Administration of 1 Gy x cm(2) to the patient involves 7 microSv to the eyes of the cardiologist (without extra protection). In conclusion, the experimental correlation factors found between phantom and scatter doses allow a fairly good estimation of staff doses from the dosimetric patient data.

show abstract

Occupational Exposure in Pediatric Cardiac Catheterization

Cited by 23 publications

References 0 publications

Estimating head and neck tissue dose from x-ray scatter to physicians performing x-ray guided cardiovascular procedures: a phantom study

Estimating head and neck tissue dose from x-ray scatter to physicians performing x-ray guided cardiovascular procedures: a phantom study

Use of a Sterile, Disposable, Radiation‐Absorbing Shield Reduces Occupational Exposure to Scatter Radiation During Pectoral Device Implantation

Staff Radiation Doses in Interventional Cardiology: Correlation With Patient Exposure

Contact Info

Product

Resources

About