@article{oai:repo.qst.go.jp:00082633,
 author = {Been Han, Young and Hyun Song, Seong and Kang, Hangyu and Ho-Young, Lee and Jong Hong, Seong and Kang, Hangyu},
 issue = {2},
 journal = {Optics Express},
 month = {Jan},
 note = {Intraoperative imaging has been studied using conventional devices such as near infrared (NIR) optical probes and gamma probes. However, these devices have limited depth penetration and spatial resolution. In a previous study, we realized a multi-modal endoscopic system. However, charge-coupled device (CCD)-based gamma imaging required long acquisition times and lacked gamma energy information. A silicon photomultiplier (SiPM)-based gamma detector is implemented in a multi-modal laparoscope herein. A gradient index (GRIN) lens and CCD are used to transfer and readout visible and NIR photons. The feasibility of in-vivo sentinel lymph node (SLN) mapping was successfully performed with the proposed system.},
 pages = {2364--2377},
 title = {SiPM-based gamma detector with a central GRIN lens for a visible/NIRF/gamma multi-modal laparoscope},
 volume = {29},
 year = {2021}
}