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Volume 34, Issue 1
Displaying 1-9 of 9 articles from this issue
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GENERAL ARTICLE
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Kota Omiya, Katsunori Ishii, Masato Ohmi, Kunio Awazu2013 Volume 34 Issue 1 Pages 3-8
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSIn laser coagulation treatment, imaging modality which can monitor coagulated layer in real time is needed to prevent overirradiation. We have already developed the combination system of optical coherence tomography (OCT) and coagulation laser. Real-time imaging of laser coagulation and evaluation of time variation of attenuation coefficient (μt) were performed by the system. In this paper, we renewed averaging algorithm of μt calculation and evaluated it to determine optimal condition of averaging. As a result, the time variation of μt during laser coagulation was measured more precisely. The degree of coagulation would be evaluated from the result.View full abstractDownload PDF (932K)
TOPICIAL ARTICLE: Frontline of Photoacoustic Image (Part2)
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[in Japanese]2013 Volume 34 Issue 1 Pages 9
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSDownload PDF (227K) -
Miya Ishihara2013 Volume 34 Issue 1 Pages 10-13
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSPhoto-acoustic imaging has been widely studied as new deep tissue functional imaging modalities, which combines the merits of optical and acoustical methods. This imaging technology, a promising structural, functional, and molecular imaging technology for a wide range of biomedical applications, has the potential with high contrast and high spatial resolution. The state-of-the-art photoacoustic imaging technology and our orthopaedic approach to the functional diagnosis will be introduced.View full abstractDownload PDF (716K) -
Yusuke Miida, Yuji Matsuura2013 Volume 34 Issue 1 Pages 14-18
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSAn optical fiber ultrasound probe for all-optical photoacoustic endoscopy imaging is developed. The probe has a Fabry Perot interferometer consisting of a Polymer film attached at the end surface of a single-mode optical fiber. The interferometer detectsacoustically-induced pressure change in the optical thickness and transform the change into output optical power. Experimental results show that the probe functions well as a photoacoustic probe and the SNR is comparable to that of a PVDF hydrophone. Results for B-mode imaging of blood vessel phantom taken by using the fiber probe are also shown.View full abstractDownload PDF (743K) -
Akio Horiguchi, Tomohiko Asano2013 Volume 34 Issue 1 Pages 19-23
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSPhotoacoustic imaging is a novel non-invasive modality enabling detection of hemoglobin and facilitating acquisition of microvessel distribution in the same manner as ultrasonography without using contrast agents. In resected radical prostatectomy specimens, strong signals were detected on the postero-lateral surface of the prostate, where network of neurovascular bundle was abundant. Our results raise a possibility that photoacoustic imaging could be a novel modality for detection and management of localized prostate cancer.View full abstractDownload PDF (714K) -
Iku Yamaga, Yasufumi Asao, Masae Torii, Fakhrejahani Elham, Masahiro T ...2013 Volume 34 Issue 1 Pages 24-29
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSPhotoacoustic mammography (PAM) is a new imaging technique for breasts. We used PAM to evaluate 39 patients with 41 previously confirmed breast lesions before their surgical operations between August 2010 and March 2012. As a result, PAM successfully detected 75.0% of breast cancers. Furthermore, PAM may provide functional information about breast cancer different from existing imaging modalities. Our results suggest that PAM is a feasible technique for clinical practice.View full abstractDownload PDF (912K)
TOPICAL ARTICLE: Ophthalmic Applications of Femtosecond Laser
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[in Japanese]2013 Volume 34 Issue 1 Pages 30
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSDownload PDF (182K) -
Manabu Hirasawa, Hiroko Bissen-Miyajima2013 Volume 34 Issue 1 Pages 31-36
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSFemtosecond laser can evaporate irradiated site by continuous irradiation of the ultrashort pulse infrared laser and dissect to the arbitrary shape. This technology is becoming essential to the surgery that requires high accuracy such as refractive surgery and microscopic ophthalmological surgery. Furthermore, in recent years the technology of femtosecond laser is now adaptive in cataract surgery that exact circle-shaped lens capsulotomy and astigmatism correction with high accuracy are expected. Eye surgery by femtosecond laser has the potential to achieve further development in the future.View full abstractDownload PDF (762K) -
Osamu Hieda2013 Volume 34 Issue 1 Pages 37-41
Published: June 30, 2013
Released on J-STAGE: December 28, 2014
JOURNAL FREE ACCESSA femtosecond laser (FSL) has been rapidly adopted as the instrument for creating corneal flaps during laser in situ keratomileusis (LASIK). With the use of proprietary software, FSLs are now capable of creating through corneal trephinations or multiplanar keratoplasty incisions for PK, which potentially increase graft–host interface surface area and fit. These adaptations have been shown to create a better graft–host fit with greater wound strength.View full abstractDownload PDF (696K)
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