실시간 혈관내초음파 영상을 위한 후단부 시스템 구현 = Implementation of a backend system for real-time intravascular ultrasound imaging

국문 초록 (Abstract)

본 논문은 실시간 혈관내초음파 영상을 위한 후단부 시스템 개발과 성능 평가 결과에 관한 것이다. 개발한 후단부 시스템은 로직 사용량과 메모리 사용량을 최소화할 수 있는 효율적인 LUTs (Look-up Tables)을 사용하여 외부 메모리 없이 하나의 FPGA (Field Programmable Gate Array)만으로 시스템을 구성함으로써 시스템의 저비용, 소형화, 경량화가 가능하도록 설계하였다. 구현한 후단부 시스템의 정확도는 FPGA의 출력값과 VHDL (VHSIC Hardware Description Language) 코드를 MATLAB 프로그램을 사용하여 동일하게 구현하여 얻은 결과를 비교함으로써 검증하였다. 토끼 동맥을 이용한 ex-vivo 실험을 통하여 개발한 후단부 시스템이 실시간 혈관내초음파 영상에 적합함을 확인하였다.

다국어 초록 (Multilingual Abstract)

This paper reports the development and performance evaluation of a backend system for real-time IVUS (Intravascular Ultrasound) imaging. The developed backend system was designed to minimize the amount of logic and memory usage by means of efficient LUTs (Look-up Tables), and it was implemented in a single FPGA (Field Programmable Gate Array) without using external memory. This makes it possible to implement the backend system that is less expensive, smaller, and lighter. The accuracy of the backend system implemented was evaluated by comparing the output of the FPGA with the result computed using a MATLAB program implemented in the same way as the VHDL (VHSIC Hardware Description Language) code. Based on the result of ex-vivo experiment using rabbit artery, the developed backend system was found to be suitable for real-time intravascular ultrasound imaging.

참고문헌 (Reference)

1 김희현, "한국인에서 요오드성 영상조영제 이상반응의 후향적 분석" 대한임상약리학회 20 (20): 165-174, 2012

2 M. J. Post, "The relative importance of arterial remodeling compared with intimal hyperplasia in lumen renarrowing after ballon angioplasty" 89 : 2816-2821, 1994

3 L. Lee, "Oblong-shaped-focused transducers for intravascular ultrasound imaging" 64 : 671-680, 2017

4 A. A. Assef, "Modeling and FPGA-based implementation of an efficient and simple envelope detector using a Hilbert Transform FIR filter for ultrasound imaging applications" 34 : 87-92, 2018

5 J. H. Chang, "Low-Cost, high-speed back-end processing system for high-frequency ultrasound b-mode imaging" 56 : 1490-1497, 2009

6 A. Colombo, "Intracoronary stenting without anticoagulation accomplished with intravascular ultrasound guidance" 91 : 1676-1688, 1995

7 D. Vancraeynest, "Imaging the vulnerable plaque" 57 : 1961-1979, 2011

8 H. M. Garcia-Garcia, "Imaging of coronary atherosclerosis: intravascular ultrasound" 31 : 2459-2469, 2010

9 J. Kim, "Image quality enhancement of intravascular ultrasound imaging using a complementary time-gain compensation" 33 : 288-291, 2014

10 J. H. Chang, "High-speed digital scan converter for high-frequency ultrasound sector scanners" 48 : 444-452, 2008

11 Y.-H. Kim, "Comparison between intravascular ultrasound and quantitative coronary angiographic measurements in coronary artery stenting" 27 : 1265-1271, 1997

12 W. Qiu, "An open system for intravascular ultrasound imaging" 59 : 2201-2209, 2012