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KMID : 1033420190220010046
Journal of Korean Society of Cardio-Vascular Interventional Technology
2019 Volume.22 No. 1 p.46 ~ p.57
The Comparison of Radiation Dose and Image Evaluation between Manual and Intelligent Measure Field
Shim Jae-Min

Yang Min-Jae
Jeong Tae-Seob
Song Chang-Uk
Bang Yong-Sik
Abstract
Purpose : To assess and compare the radiation dose and image evaluation between Manual and Intelligent Measure Field during PCNA(Percutaneous Needle Aspiration : PCNA).

Materials and Methods : LUNGMAN Phantom(Chest Phantom K1, KYOTO KAGAKU, Japan) was sccaned with Dyna CT(AXIOM-Artis zee ceiling, Siemens, Germany) with each of Manual and Intelligent Measure Field, 30 times respectively. Analyzed significance test at 95% of confidence level to assess and compare about Contrast, SNR(Signal to Ratio), CNR(Contrast to Ratio), DAP(Dose Area Product) by using independent t-test analysis. 3 radiologists blinded to the both of Measure Fields independently scored subjective image quality on 5-point Likert scale and measured image noise.

Result : DAP for Dyna CT from Manual and Intelligent Measure Field were 566.97¡¾7.98¥ìGy?m2 and 748.24¡¾3.44¥ìGy?m2 ; statistically significant difference(p<0.05) was shown. Contrast were ?877.80¡¾5.50 and ?886.86¡¾4.47 ; statistically significant difference(p<0.05) was shown. SNR were ?8.83¡¾0.32 and ?9.22¡¾0.49 ; statistically significant difference(p<0.05) was shown. CNR were ?14.38¡¾0.41 and ?15.07¡¾0.62 ; statistically significant difference(p<0.05) was shown. Blinded scores were mean 2.2 ; Overall percent agreement for pairwise ratings was ¡Ã81% for all conditions(p<0.05).

Conclusion : The phantom study indicates that not only Manual Measure Field applies significantly less dose and higher Contrast, SNR, CNR to the patient but also achieves similar image quality.
KEYWORD
PCNA, DAP, Contrast, SNR, CNR
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