3D Volume Scanning Using a T-Shaped Ultrasound Transducer : A Feasibility Study for Ocular Imaging
- 주제어 (키워드) US , ONSD-ETD measurement , T-shaped array , 3D volume scanning , FOV
- 발행기관 서강대학교 일반대학원
- 지도교수 유양모
- 발행년도 2025
- 학위수여년월 2025. 2
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제 URI http://www.dcollection.net/handler/sogang/000000079701
- UCI I804:11029-000000079701
- 본문언어 영어
- 저작권 서강대학교 논문은 저작권 보호를 받습니다.
초록 (요약문)
Elevated intracranial pressure (ICP) is a clinical condition that can lead to severe consequences, including death, making early detection and treatment crucial. Currently, invasive techniques are employed for ICP assessment, although they have limitations in accessibility and potential risks of hemorrhage and infection. Measuring optic nerve sheath diameter (ONSD) and eye transverse diameter (ETD) through ultrasound (US) presents a non-invasive and accessible alternative for monitoring ICP. However, current ocular imaging using 1D probes faces challenges in intraobserver and interobserver reliability. While 3D volume imaging can address these issues, 2D probes introduce complexity in their implementation. This paper proposes a novel 3D volumetric scanning method using a T-shaped array, which operates within a limited field of view (FOV). The proposed T-shaped array consists of two phased arrays arranged perpendicularly, obtaining slice images of the volume through the defocusing of the elevational beam. The use of an acoustic lens is introduced to achieve defocusing of acoustic pressure, thereby improving the FOV. The acoustic lens was designed based on ray tracing modeling to enhance beam performance. Simulations and in-vitro experiments were conducted to validate the proposed method’s capability for volume scanning. The results demonstrate that the T-shaped array offers an effective solution for volume scanning in ocular ultrasound, providing a feasible and reliable method for measuring ONSD and ETD, which can contribute to improved clinical assessment of ICP.
more목차
Ⅰ. Introduction 1
Ⅱ. Methods 4
A. Volume scanning with a T-shaped array. 4
B. Acoustic Lens Design 6
C. Beamforming Sequence 9
D. Coherence Factor 12
Ⅲ. Experimental setup 13
A. Simulation Study 13
B. Beam field measurements with acoustic lens 17
C. Phantom study 19
Ⅳ. Experimental Results 22
A. Simulation Study 22
B. Beam field measurements with acoustic lens 25
C. Phantom study 26
V. Discussion 29
VI. Conclusion 30
References 31
