Abstract

JACC

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TCTAP A-062

An Easy Method to Evaluate Radiation Peak Skin Dose in the Coronary Angiography by Using a Simulating Phantom and Thermoluminescent Dosimeters

By Kai Chieh Hsu

Presenter

Kai Chieh Hsu

Authors

Kai Chieh Hsu1

Affiliation

New Taipei Municipal Tucheng Hospital, Taiwan1
View Study Report
TCTAP A-062
Others (Unclassified)

An Easy Method to Evaluate Radiation Peak Skin Dose in the Coronary Angiography by Using a Simulating Phantom and Thermoluminescent Dosimeters

Kai Chieh Hsu1

New Taipei Municipal Tucheng Hospital, Taiwan1

Background

Recent, the percutaneous coronary interventions (PCI) has increased the average procedural radiation dose. In the meantime, the number of radiation skin damage has increased. Thus, monitoring radiation dose is necessary. In clinical setting, dose-area-product (DAP) and air-kerma (AK) are used to estimate patient peak skin dose (PSD). However, these data are calculated by using presumptive mathematic equation which ignore each individual's characters and different projectors angles. Our study aims to provide an easy method to record and estimate PSD with different tube angulation in PCI setting.

Methods

Thermoluminescnet dosimeters (TLDs) were used to measure radiation dose of Hp (10) and Hp (0.07) of skin. We used cine mode with setting of 15 frames per second rate, recorded for 5 seconds and repeated for 5 times. We tested with standard tube angulations, such as posteroanterior view (PA), caudal 35 degree view (CAU 35), cranial 35 degree view (CRA 35), LAO 65 degree + caudal 20 degree view (spider view), and left anterior oblique 50 degree view (LAO 50).

Results

The results showed the caudal 35 degree view had highest radiation dose in DAP, Hp (10) and Hp (0.07). When the zoom-in stage was used, DAP reduced however AK and peak skin dose increased. 

Conclusion

Finally, we used values of skin dose of Hp (10) and Hp (0.07) compared to values of DAP in five groups, the value of PSD is about between 3% to 7% of DAP. By sharing these exceperiences, we provide an easy practicable method to estimate the PSD in the PCI for each catheterization lab.

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