[행사/세미나] IPHC Seminar Series / 3. 30.
- 지능형정밀헬스케어융합학과
- 조회수735
- 2021-03-29
❝Photoacoustic imaging as a new clinical imaging modality❞
Jin Ho Chang, Ph.D. (DGIST)
- 일시 : 2021. 3. 30. 15:00
- 장소 : 온라인
<강의 링크- 해당 시간에만 연결 가능>
https://skku-ict.webex.com/skku-ict-en/j.php?MTID=m642d9b8df0ea1690bc752317bd6c8dec
Medical imaging modalities have their own advantages and disadvantages. Medical fusion imaging techniques have attracted considerable attention because they enable us to obtain complementary information from each imaging modality in a single procedure. Among them, ultrasound and light are relatively easy to combine to maximize their advantages while complementing each other’s disadvantages. For this reason, there have been many attempts to combine ultrasound and light to create new clinical values. As an example, I will introduce photoacoustic (PA) imaging modality and potential clinical applications in this seminar. In the last decade, PA imaging has received much attention due to its attractive features such as combining strong optical contrast with high ultrasound resolution. PA imaging is categorized into PA microscopy (PAM), PA tomography (PAT) and cross-sectional PA imaging (CS-PAI) based on imaging configuration. This new imaging modality can be considered a molecular imaging tool. This is so because optical beam such as laser with a particular wavelength induces the vibrational and rotational oscillation of a specific molecule such as hemoglobin in blood. This leads to the peak absorption of excited laser energy in the molecule and subsequently converts the delivered energy into heat. When laser pulse width is shorter than thermal transport time of absorbed energy, defined as thermal confinement, the energy brings about transient thermoelastic expansion and thus generates ultrasound (or photo-acoustic signal). Finally, PA images are constructed with the generated signals in an ultrasound imaging system. As a result, PA imaging combines the both advantages of high optical contrast and good ultrasound spatial resolution in relatively deep-lying tissues. The presentation will cover the brief theoretical background and potential clinical applications of PA imaging, such as diagnosis of breast and prostate cancers and identification of the sentinel lymph node.