scholarly journals Development of Software for Estimating Exposure Dose and Radiation Exposure Region in Cardiac Catheterization Inspection

2011 ◽  
Vol 67 (5) ◽  
pp. 507-516 ◽  
Author(s):  
Michio Ozaki ◽  
Toshio Take ◽  
Shinichiro Sumi ◽  
Hiroaki Ando ◽  
Yasuo Nakazawa
Keyword(s):  
Radiation Exposure ◽  
Cardiac Catheterization ◽  
Exposure Dose

scholarly journals Longitudinal Improvements in Radiation Exposure in Cardiac Catheterization for Congenital Heart Disease

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Brian P. Quinn ◽  
Priscila Cevallos ◽  
Aimee Armstrong ◽  
David Balzer ◽  
Howaida El-said ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Radiation Dose ◽  
Radiation Exposure ◽  
Cardiac Catheterization ◽  
Exposure Dose ◽  
Dose Area Product ◽  
Targeted Interventions ◽  
Area Product ◽  
Patient Radiation Exposure ◽  
Percent Decrease

Background: The C3PO-QI (Congenital Cardiac Catheterization Project on Outcomes – Quality Improvement), a multicenter registry launched in 2015, instituted quality improvement (QI) initiatives to reduce patient radiation exposure. Through regular collaboration, this initiative would allow for harmony among active participants, maximizing efforts and efficiency at achieving radiation best practices. This study sought to report these efforts with a detailed methodology for which institutions can target initiatives, reducing radiation exposure, and increasing patient safety. Methods: Data were collected prospectively by 8 C3PO-QI institutions between January 1, 2015 and December 31, 2017. Radiation exposure was measured in dose area product per body weight (dose area product/kg; µGy*m 2 /kg) and reported by expected radiation exposure categories (REC) and institution for 40 published unique procedure types. Targeted interventions addressing selected strategic domains for radiation reduction were implemented in the pediatric catheterization labs of the C3PO-QI institutions. Results: The study consisted of 15 257 unique cases. Median exposure (dose area product/kg) was decreased by 30% for all procedures. Dose area product/kg was reduced in all 3 REC, with the greatest improvement observed in REC I (REC I, −37%; REC II, −23%; REC III, −27%). Although the baseline radiation exposures and exact percent decrease varied across all C3PO-QI sites, each institution demonstrated improvements in radiation dose over time. These improvements occurred with the implementation of institution-specific QI interventions accelerated by participation in the C3PO-QI multicenter collaborative. Conclusions: Substantial radiation dose reductions can be achieved using targeted QI methodology and interventions. Participation in a multicenter QI collaborative may accelerate improvement across all centers due to enhanced engagement and shared learning between sites.

Evaluation of Radiation Exposure Levels in Cine Cardiac Catheterization Laboratories

10.37206/11 ◽  
1984 ◽  
Author(s):  
Stephen Balter ◽  
Cari Borras ◽  
Pei-Jan Paul Lin ◽  
Robert J. Moore ◽  
William E. Moore ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Cardiac Catheterization ◽  
Exposure Levels

Evaluation of Velopharyngeal Closure Function With 4-Dimensional Computed Tomography and Assessment of Radiation Exposure in Pediatric Patients: A Cross-Sectional Study

2021 ◽  
pp. 105566562110017
Author(s):  
Yoshikazu Kobayashi ◽  
Masanao Kobayashi ◽  
Daisuke Kanamori ◽  
Naoko Fujii ◽  
Yumi Kataoka ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Exposure ◽  
Exposure Dose ◽  
Velopharyngeal Insufficiency ◽  
Radiation Doses ◽  
Secondary Surgery ◽  
Cross Sectional ◽  
Computed Tomography Images ◽  
Velopharyngeal Closure ◽  
Closure Function

Objective: Some patients with cleft palate (CP) need secondary surgery to improve functionality. Although 4-dimensional assessment of velopharyngeal closure function (VPF) in patients with CP using computed tomography (CT) has been existed, the knowledge about quantitative evaluation and radiation exposure dose is limited. We performed a qualitative and quantitative assessment of VPF using CT and estimated the exposure doses. Design: Cross-sectional. Setting: Computed tomography images from 5 preoperative patients with submucous CP (SMCP) and 10 postoperative patients with a history of CP (8 boys and 7 girls, aged 4-7 years) were evaluated. Patients: Five patients had undergone primary surgery for SMCP; 10 received secondary surgery for hypernasality. Main Outcome Measures: The presence of velopharyngeal insufficiency (VPI), patterns of velopharyngeal closure (VPC), and cross-sectional area (CSA) of VPI was evaluated via CT findings. Organ-absorbed radiation doses were estimated in 5 of 15 patients. The differences between cleft type and VPI, VPC patterns, and CSA of VPI were evaluated. Results: All patients had VPI. The VPC patterns (SMCP/CP) were evaluated as coronal (1/4), sagittal (0/1), circular (1/2), and circular with Passavant’s ridge (2/2); 2 patients (1/1) were unevaluable because of poor VPF. The CSA of VPI was statistically larger in the SMCP group ( P = .0027). The organ-absorbed radiation doses were relatively lower than those previously reported. Conclusions: Four-dimensional CT can provide the detailed findings of VPF that are not possible with conventional CT, and the exposure dose was considered medically acceptable.

scholarly journals Radiation exposure dose of fluoroscopy-guided gastrointestinal procedures: A single-center retrospective study

2020 ◽  
Vol 08 (12) ◽  
pp. E1872-E1877
Author(s):  
Shiro Hayashi ◽  
Tsutomu Nishida ◽  
Shinji Kuriki ◽  
Li-sa Chang ◽  
Kazuki Aochi ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Balloon Dilatation ◽  
Exposure Dose ◽  
Sigmoid Volvulus ◽  
Tube Placement ◽  
Injection Sclerotherapy ◽  
Single Center ◽  
Endoscopic Injection ◽  
Dose Area Product ◽  
Esophageal Balloon

Abstract Background and study aims Fluoroscopy-guided gastrointestinal procedures (FGPs) are increasingly common. However, the radiation exposure (RE) to patients undergoing FGPs is still unclear. We examined the actual RE of FGPs. Patients and methods This retrospective, single-center cohort study included consecutive FGPs, including endoscopic retrograde cholangiopancreatography (ERCP), interventional endoscopic ultrasound (EUS), enteral stenting, balloon-assisted enteroscopy, tube placement, endoscopic injection sclerotherapy (EIS), esophageal balloon dilatation and repositioning for sigmoid volvulus, from September 2012 to June 2019. We measured the air kerma (AK, mGy), dose area product (DAP, Gycm2), and fluoroscopy time (FT, min) for each procedure. Results In total, 3831 patients were enrolled. Overall, 2778 ERCPs were performed. The median AK, DAP, and FT were as follows: ERCP: 109 mGy, 13.3 Gycm2 and 10.0 min; self-expandable enteral stenting (SEMS): 62 mGy, 12.4 Gycm2 and 10.4 min; tube placement: 40 mGy, 13.8 Gycm2 and 11.1 min; balloon-assisted enteroscopy: 43 mGy, 22.4 Gycm2 and 18.2 min; EUS cyst drainage (EUS-CD): 96 mGy, 18.3 Gycm2 and 10.4 min; EIS: 36 mGy, 8.1 Gycm2 and 4.4 min; esophageal balloon dilatation: 9 mGy, 2.2 Gycm2 and 1.8 min; and repositioning for sigmoid volvulus: 7 mGy, 4.7 Gycm2 and 1.6 min. Conclusion This large series reporting actual RE doses of various FGPs could serve as a reference for future prospective studies.

scholarly journals Simulation Study on Radiation Exposure of Emergency Medical Responders From Radioactively Contaminated Patients

2020 ◽  
Author(s):  
Takakiyo Tsujiguchi ◽  
Yoko Suzuki ◽  
Mizuki Sakamoto ◽  
Kazuki Narumi ◽  
Katsuhiro Ito ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Radiation Exposure ◽  
Exposure Dose ◽  
Radioactive Source ◽  
Anxiety Reduction ◽  
Radiation Doses ◽  
Emergency Medical ◽  
Radiation Emergency ◽  
Computational Phantoms

Abstract Emergency medical responders (EMRs), who save victims in a radiation emergency, are at risk of radiation exposure. In this study, the exposure dose to EMRs assisting contaminated patients was estimated using a Monte Carlo simulation, and will produce data that contributes to EMR education and anxiety reduction. Using the Monte Carlo simulation, we estimated radiation doses for adult computational phantoms with radioactive contamination conditions radiation dosages were based on findings from previous studies. At the contamination condition corresponding to the typical upper limit of general GM survey meters, the radiation doses of EMRs were estimated to be less than μSv per hour. In case of a heavier contamination due to mishandling of an intense radioactive source with hundreds of GBq or more, their radiation doses would be close to 100 mSv per hour. The results have implied that the radiological accident with a highly radioactive source would expose EMR to the risk of significant radiation exposure exceeding the dose limit. It is thus crucial that the authority or other party who are responsible for the health of EMRs ensures that they shall have necessary education and training on the effective measures for protecting themselves from the possible, excessive radiation exposure.

Abstract 106: Determinants of Fluoroscopy time in Veterans Undergoing Cardiac Catheterization Procedures: Insights from the National VA Clinical Assessment, Reporting and Tracking (CART) Program

2012 ◽  
Vol 5 (suppl_1) ◽  
Author(s):  
Thomas T Tsai ◽  
Lauren Pointer ◽  
Michael P Ho ◽  
Reza Fazel ◽  
Brahmajee K Nallamothu ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Cardiac Catheterization ◽  
Bypass Graft ◽  
Arterial Disease ◽  
National Registry ◽  
Fluoroscopy Time ◽  
Factors Associated ◽  
Improvement Programs ◽  
Hospital Factors ◽  
Peripheral Arterial

Background: Radiation exposure to Veterans from invasive cardiac procedures is high and accounts for a substantial proportion of their overall exposure from medical imaging. The patient, provider and hospital factors associated with increased fluoroscopy time are unclear. Methods: From the National VA CART program database of catheterization laboratories, we evaluated the distribution of fluoroscopy time in patients undergoing coronary angiography (CA), bypass graft angiography (BGA) and/or PCI. Using multivariable logistic regression, we evaluated the patient, provider and hospital factors associated with the highest quartile of fluoroscopy time. Results: We examined 87,658 CA, BGA and PCI procedures performed by 362 operators at 58 VA facilities from 2007 through 2010. There is wide variation in fluoroscopy time by operator regardless of procedure performed (Table 1). Multiple patient, provider and hospital factors were associated with fluoroscopy times in the highest quartile. Patient factors included age and a history of peripheral arterial disease; provider factors included operator volume and experience; and hospital factors included whether or not they were associated with a teaching program. Conclusion: In a large VA national registry of all cardiac catheterization procedures, fluoroscopy time is highly variable and dependent on multiple factors, many of which may be modifiable. Quality improvement programs targeted at modifiable behaviors may lead to decreased fluoroscopy times and thus radiation exposure for our veterans.

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