In Vivo Photoacoustic and Fluorescence Cystography Using Clinically Relevant Dual Modal Indocyanine Green

Sensors

Sungjo Park²  Jeesu Kim¹  Mansik Jeon¹  Jaewon Song² 

[1] Departments of Creative IT Engineering and Electrical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 790-784, Korea; E-Mails:;School of Electronics Engineering, College of IT Engineering, Kyungpook National University, 1370, Sankyuk-dong, Buk-gu, Daegu 702-701, Korea; E-Mails:

关键词: photoacoustic tomography;    fluorescence image;    cystography;    indocyanine green;   

DOI  :  10.3390/s141019660

来源: mdpi

【 摘 要 】

Conventional X-ray-based cystography uses radio-opaque materials, but this method uses harmful ionizing radiation and is not sensitive. In this study, we demonstrate nonionizing and noninvasive photoacoustic (PA) and fluorescence (FL) cystography using clinically relevant indocyanine green (ICG) in vivo. After transurethral injection of ICG into rats through a catheter, their bladders were photoacoustically and fluorescently visualized. A deeply positioned bladder below the skin surface (i.e., ∼1.5–5 mm) was clearly visible in the PA and FL image using a laser pulse energy of less than 2 mJ/cm² (1/15 of the safety limit). Then, the in vivo imaging results were validated through in situ studies. Our results suggest that dual modal cystography can provide a nonionizing and noninvasive imaging tool for bladder mapping.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.