Vector extrapolation methods for accelerating iterative reconstruction methods in limited-data photoacoustic tomography.

abstract：:Previous research correcting for variable speed of sound in photoacoustic tomography (PAT) based on a generalized radon transform (GRT) model assumes first-order geometrical acoustics (GA) approximation. In the GRT model, the pressure is related to the optical absorption, in an acoustically inhomogeneous medium, throu...

journal_title：Journal of biomedical optics

authors： Modgil D,Anastasio MA,La Rivière PJ

更新日期：2010-03-01 00:00:00

abstract：:We describe a wide-field optical tomography technique, which allows the measurement-guided optimization of illumination patterns for enhanced reconstruction performances. The iterative optimization of the excitation pattern aims at reducing the dynamic range in photons transmitted through biological tissue. It increas...

journal_title：Journal of biomedical optics

authors： Venugopal V,Intes X

更新日期：2013-03-01 00:00:00

abstract：:Using commercially available organic fluorophores, the current applications of Förster (fluorescence) resonance energy transfer (FRET) are limited to about 80 Å. However, many essential activities in cells are spatially and/or temporally dependent on the assembly/disassembly of transient complexes consisting of large-...

journal_title：Journal of biomedical optics

authors： Maliwal BP,Raut S,Fudala R,D'Auria S,Marzullo VM,Luini A,Gryczynski I,Gryczynski Z

更新日期：2012-01-01 00:00:00

abstract：:Hyperspectral reflectance imaging technique has been used for in vivo detection of cervical intraepithelial neoplasia. However, the clinical outcome of this technique is suboptimal owing to multiple limitations such as nonuniform illumination, high-cost and bulky setup, and time-consuming data acquisition and processi...

journal_title：Journal of biomedical optics

authors： Zheng W,Wang C,Chang S,Zhang S,Xu RX

更新日期：2015-12-01 00:00:00

abstract：:Different colors of visible light penetrate to varying depths in tissue due to the wavelength dependence of tissue optical absorption and elastic scattering. We exploit this to map the contour of the closest surface of a buried fluorescent object. This uses a novel algorithm based on the diffusion theory description o...

journal_title：Journal of biomedical optics

authors： Kim A,Roy M,Dadani FN,Wilson BC

更新日期：2010-11-01 00:00:00

abstract：:Three major analytical tools in imaging science are summarized and demonstrated relative to optical imaging in vivo. Standard resolution testing is optimal when infinite contrast is used and hardware evaluation is the goal. However, deep tissue imaging of absorption or fluorescent contrast agents in vivo often present...

journal_title：Journal of biomedical optics

authors： Pogue BW,Davis SC,Song X,Brooksby BA,Dehghani H,Paulsen KD

更新日期：2006-05-01 00:00:00

abstract：:We report a new two-channel fluorescence microscopy technique for surface-generated fluorescence. The realized fluorescence microscope allows high resolution imaging of aqueous samples. The core element of the instrument is a parabolic mirror objective that is used to collect the fluorescence at large surface angles a...

journal_title：Journal of biomedical optics

authors： Verdes D,Ruckstuhl T,Seeger S

更新日期：2007-05-01 00:00:00

abstract：:Multiphoton microscopy (MPM) has the capacity to record second-harmonic generation (SHG) and endogenous two-photon excitation fluorescence (2PEF) signals emitted from biological tissues. The development of fiber-based miniaturized endomicroscopes delivering pulses in the femtosecond range will allow the transfer of MP...

journal_title：Journal of biomedical optics

authors： Garofalakis A,Kruglik SG,Mansuryan T,Gillibert A,Thiberville L,Louradour F,Vever-Bizet C,Bourg-Heckly G

更新日期：2019-10-01 00:00:00

abstract：:In all fundus laser treatments of the eye, the temperature increase is not exactly known. In order to optimize treatments, an online temperature determination is preferable. We investigated a noninvasive optoacoustic method to monitor the fundus temperature during pulsed laser irradiation. When laser pulses are applie...

journal_title：Journal of biomedical optics

authors： Schule G,Huttmann G,Framme C,Roider J,Brinkmann R

更新日期：2004-01-01 00:00:00

abstract：:Intrauterine photoacoustic and ultrasound imaging are probe-based imaging modalities with translational potential for use in detecting endometrial diseases. This deep-tissue imaging probe design allows for the retrofitting of commercially available endometrial sampling curettes. The imaging probe presented here has a ...

journal_title：Journal of biomedical optics

authors： Miranda C,Barkley J,Smith B

更新日期：2018-04-01 00:00:00

abstract：:We have developed a novel parallel-plate diffuse optical tomography (DOT) system for three-dimensional in vivo imaging of human breast tumor based on large optical data sets. Images of oxy-, deoxy-, and total hemoglobin concentration as well as blood oxygen saturation and tissue scattering were reconstructed. Tumor ma...

journal_title：Journal of biomedical optics

authors： Choe R,Konecky SD,Corlu A,Lee K,Durduran T,Busch DR,Pathak S,Czerniecki BJ,Tchou J,Fraker DL,Demichele A,Chance B,Arridge SR,Schweiger M,Culver JP,Schnall MD,Putt ME,Rosen MA,Yodh AG

更新日期：2009-03-01 00:00:00

abstract：:We report noninvasive, in vivo optical imaging deep within a mouse brain by swept-source optical coherence tomography (SS-OCT), enabled by a 1.3-μm vertical cavity surface emitting laser (VCSEL). VCSEL SS-OCT offers a constant signal sensitivity of 105 dB throughout an entire depth of 4.25 mm in air, ensuring an exten...

journal_title：Journal of biomedical optics

authors： Choi WJ,Wang RK

更新日期：2015-10-01 00:00:00

abstract：:In laser retinal photocoagulation, short (<20 ms) pulses have been found to reduce thermal damage to the inner retina, decrease treatment time, and minimize pain. However, the safe therapeutic window (defined as the ratio of power for producing a rupture to that of mild coagulation) decreases with shorter exposures. T...

journal_title：Journal of biomedical optics

authors： Sramek C,Paulus Y,Nomoto H,Huie P,Brown J,Palanker D

更新日期：2009-05-01 00:00:00

abstract：:Quantitative and qualitative evaluations of structure and composition are important in monitoring development of engineered vascular tissue both in vitro and in vivo. Destructive techniques are an obstacle for performing time-lapse analyses from a single sample or animal. This study demonstrates the ability of time-re...

journal_title：Journal of biomedical optics

authors： Fatakdawala H,Griffiths LG,Humphrey S,Marcu L

更新日期：2014-08-01 00:00:00

abstract：:We experimentally implement label-free phase microscopy using wide-field digital interferometry (WFDI) techniques to retrieve quantitative volumetric data of articular chondrocyte dynamics. Using the scanless interferometric system, we visualize chondrocyte swelling and bursting induced by hypo-osmotic pressure. Recon...

journal_title：Journal of biomedical optics

authors： Shaked NT,Finan JD,Guilak F,Wax A

更新日期：2010-01-01 00:00:00

abstract：:Breast cancer is one of the most common cancers in females. To monitor chemotherapeutic efficacy for breast cancer, medical imaging systems such as x-ray mammography, computed tomography, magnetic resonance imaging, and ultrasound imaging have been used. Currently, it can take up to 3 to 6 weeks to see the tumor respo...

journal_title：Journal of biomedical optics

authors： Lee S,Jeong H,Seong M,Kim JG

更新日期：2017-12-01 00:00:00

abstract：:An evolving area of biomedical research is related to the creation of implantable units that provide various possibilities for imaging, measurement, and the monitoring of a wide range of diseases and intrabody phototherapy. The units can be autonomic or built-in in some kind of clinically applicable implants. Because ...

journal_title：Journal of biomedical optics

authors： Sheinman V,Rudnitsky A,Toichuev R,Eshiev A,Abdullaeva S,Egemkulov T,Zalevsky Z

更新日期：2014-01-01 00:00:00

abstract：:Functional near-infrared spectroscopy (fNIRS) is being increasingly applied to affective and social neuroscience research; however, the reliability of this method is still unclear. This study aimed to evaluate the test–retest reliability of the fNIRS-based prefrontal response to emotional stimuli. Twenty-six participa...

journal_title：Journal of biomedical optics

authors： Huang Y,Mao M,Zhang Z,Zhou H,Zhao Y,Duan L,Kreplin U,Xiao X,Zhu C

更新日期：2017-01-01 00:00:00

abstract：:A simultaneous multispectral fluorescence imaging system incorporating multiplexed volume holographic grating (VHG) is developed to acquire multispectral images of an object in one shot. With the multiplexed VHG, the imaging system can provide the distribution and spectral characteristics of multiple fluorophores in t...

journal_title：Journal of biomedical optics

authors： Lv Y,Zhang J,Zhang D,Cai W,Chen N,Luo J

更新日期：2016-06-01 00:00:00

abstract：:An integrated miniature multi-modal microscope (4M device) for microendoscopy was built and tested. Imaging performance is evaluated and imaging results are presented for both fluorescence and reflectance samples. Images of biological samples show successful imaging of both thin layers of fixed cells prepared on a sli...

journal_title：Journal of biomedical optics

authors： Rogers JD,Landau S,Tkaczyk TS,Descour MR,Rahman MS,Richards-Kortum R,Kärkäinen AH,Christenson T

更新日期：2008-09-01 00:00:00

abstract：:Ultrasmall scale implants have recently attracted focus as valuable tools for monitoring both acute and chronic diseases. Semiconductor optical technologies are the key to miniaturizing these devices to the long-sought sub-mm scale, which will enable long-term use of these devices for medical applications. This can al...

journal_title：Journal of biomedical optics

authors： Mujeeb-U-Rahman M,Adalian D,Chang CF,Scherer A

更新日期：2015-09-01 00:00:00

abstract：SIGNIFICANCE:Photothermal optical coherence tomography (PT-OCT) has the promise to offer structural images coregistered with chemical composition information, which can offer a significant impact in early detection of diseases such as atherosclerosis. AIM:We take the first step in understanding the relation between PT...

journal_title：Journal of biomedical optics

authors： Salimi M,Villiger M,Tabatabaei N

更新日期：2020-12-01 00:00:00

abstract：:Autofluorescence of the cornea within specific wavelength region and dynamic light scattering measurements of ocular tissue have both been used for early-stage detection of the presence of diabetic retinopathy. In the present study, autofluorescence of the cornea and dynamic light scattering in the cornea and vitreous...

journal_title：Journal of biomedical optics

authors： Rovati L,Fankhauser F,Docchio F,Van Best J

更新日期：1998-07-01 00:00:00

abstract：:We experimentally study potential mechanisms by which the enhancement factor in low-coherence enhanced backscattering (LEBS) can probe subtle variations in radial intensity distribution in weakly scattering media. We use enhanced backscattering of light by implementing either (1) low spatial coherence illumination or ...

journal_title：Journal of biomedical optics

authors： Liu J,Xu Z,Song Q,Konger RL,Kim YL

更新日期：2010-05-01 00:00:00

abstract：:We demonstrate the first application of Raman spectroscopy in diagnosing nonmalignant, premalignant, malignant, and metastatic stages of breast cancer in a three-dimensional (3-D) cell culture model that closely mimics an in vivo environment. Comprehensive study comparing classification in two-dimensional (2-D) and 3-...

journal_title：Journal of biomedical optics

authors： Damayanti NP,Fang Y,Parikh MR,Craig AP,Kirshner J,Irudayaraj J

更新日期：2013-11-01 00:00:00

abstract：:The expensive fabrication of current opto-microfluidic sensors is a barrier to the successful adoption of these devices in point-of-care testing. This work reports a simple inexpensive opto-microfluidic device incorporating a poly(dimethylsiloxane)-glass hybrid microfluidic chip modified with gold nanoparticles and a ...

journal_title：Journal of biomedical optics

authors： Pires NM,Dong T

更新日期：2014-03-01 00:00:00

abstract：:This paper presents a fiber Bragg grating (FBG)-instrumented prosthetic silicone liner that provides cushioning for the residual limb and can successfully measure interface pressures inside prosthetic sockets of lower-limb amputees in a simple and practical means of sensing. The liner is made of two silicone layers be...

journal_title：Journal of biomedical optics

authors： Al-Fakih E,Arifin N,Pirouzi G,Mahamd Adikan FR,Shasmin HN,Abu Osman NA

更新日期：2017-08-01 00:00:00

abstract：:The present work describes the fabrication and characterization of an optical fiber pH sensor using a sol–gel technique. The sensing head configuration is incorporated using a short section of no-core fiber, coated with tetraethyl orthosilicate and spliced at the end of a single mode fiber with a bulge. Different type...

journal_title：Journal of biomedical optics

authors： Bhardwaj V,Pathak AK,Singh VK

更新日期：2017-05-01 00:00:00

abstract：:Using the multiresolution ability of wavelets and effectiveness of singular value decomposition (SVD) to identify statistically robust parameters, we find a number of local and global features, capturing spectral correlations in the co- and cross-polarized channels, at different scales (of human breast tissues). The c...

journal_title：Journal of biomedical optics

authors： Gharekhan AH,Arora S,Oza AN,Sureshkumar MB,Pradhan A,Panigrahi PK

更新日期：2011-08-01 00:00:00

abstract：:Endoscopic ultrasound-guided fine needle aspirations (EUS-FNA) of pancreatic masses suffer from sample errors and low-negative predictive values. Fiber-optic spectroscopy in the visible to near-infrared wavelength spectrum can noninvasively extract physiological parameters from tissue and has the potential to guide th...

journal_title：Journal of biomedical optics

authors： Stegehuis PL,Boogerd LS,Inderson A,Veenendaal RA,van Gerven P,Bonsing BA,Sven Mieog J,Amelink A,Veselic M,Morreau H,van de Velde CJ,Lelieveldt BP,Dijkstra J,Robinson DJ,Vahrmeijer AL

更新日期：2017-02-01 00:00:00