title: Photoacoustic imaging features of intraocular tumors: Retinoblastoma and uveal melanoma.
abstract: The purpose of this study is to examine the capability of photoacoustic (PA) imaging (PAI) in assessing the unique molecular and architectural features in ocular tumors. A real-time PA and ultrasonography (US) parallel imaging system based on a research US platform was developed to examine retinoblastoma in mice in vivo and human retinoblastoma and uveal melanoma ex vivo. PA signals were generated by optical illumination at 720, 750, 800, 850, 900 and 950 nm delivered through a fiber optical bundle. The optical absorption spectra of the tumors were derived from the PA images. The optical absorption spectrum of each tumor was quantified by fitting to a polynomial model. The microscopic architectures of the tumors were quantified by frequency domain analysis of the PA signals. Both the optical spectral and architectural features agree with the histological findings of the tumors. The mouse and human retinoblastoma showed comparable total optical absorption spectra at a correlation of 0.95 (p<0.005). The quantitative PAI features of human retinoblastoma and uveal melanoma have shown statistically significant difference in two tailed t-tests (p<0.05). Fully compatible with the concurrent procedures, PAI could be a potential tool complementary to other diagnostic modalities for characterizing intraocular tumors.
authors.affiliation: Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America.
authors.forename: Guan
authors.initials: G
authors.lastname: Xu
authors.affiliation: Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, United States of America.
authors.forename: Yafang
authors.initials: Y
authors.lastname: Xue
authors.affiliation: Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan, United States of America.
authors.forename: Zeynep Gürsel
authors.initials: ZG
authors.lastname: Özkurt
authors.affiliation: Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan, United States of America.
authors.forename: Naziha
authors.initials: N
authors.lastname: Slimani
authors.affiliation: Department of Ophthalmology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
authors.forename: Zizhong
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America.|Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, United States of America.
authors.forename: Xueding
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Electronics and Information Engineering, Hebei University of Technology, Tianjin, China.
authors.forename: Kewen
authors.initials: K
authors.lastname: Xia
authors.affiliation: Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, California, United States of America.
authors.forename: Teng
authors.initials: T
authors.lastname: Ma
authors.affiliation: Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, California, United States of America.
authors.forename: Qifa
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan, United States of America.
authors.forename: Hakan
authors.initials: H
authors.lastname: Demirci
mesh_terms: D000818:Animals; D006801:Humans; D008545:Melanoma / Q000175:diagnosis*; D051379:Mice; D008822:Mice, Transgenic; D061088:Photoacoustic Techniques / Q000379:methods*; D012160:Retina / Q000473:pathology*; D019572:Retinal Neoplasms / Q000473:pathology*; D012175:Retinoblastoma / Q000175:diagnosis*; D014602:Uvea / Q000473:pathology*; D014604:Uveal Neoplasms / Q000175:diagnosis*; D000098943:Uveal Melanoma