نتایج جستجو برای: tissue harmonic imaging

تعداد نتایج: 1349927  

2011
Lauren E. Grosberg Andrew J. Radosevich Samuel Asfaha Timothy C. Wang Elizabeth M. C. Hillman

BACKGROUND Living tissues contain a range of intrinsic fluorophores and sources of second harmonic generation which provide contrast that can be exploited for fresh tissue imaging. Microscopic imaging of fresh tissue samples can circumvent the cost and time associated with conventional histology. Further, intrinsic contrast can provide rich information about a tissue's composition, structure an...

Journal: :The Journal of the Acoustical Society of America 2005
Xinmai Yang Robin O Cleveland

A time-domain numerical code (the so-called Texas code) that solves the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation has been extended from an axis-symmetric coordinate system to a three-dimensional (3D) Cartesian coordinate system. The code accounts for diffraction (in the parabolic approximation), nonlinearity and absorption and dispersion associated with thermoviscous and relaxation proces...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2004
Daniel A Dombeck Mireille Blanchard-Desce Watt W Webb

Nonlinear microscopy has proven to be essential for neuroscience investigations of thick tissue preparations. However, the optical recording of fast (approximately 1 msec) cellular electrical activity has never until now been successfully combined with this imaging modality. Through the use of second-harmonic generation microscopy of primary Aplysia neurons in culture labeled with 4-[4-(dihexyl...

Journal: :research in cardiovascular medicine 0
maryam moradian rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran avisa tabib heart valve disease research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran ahmad ghasempour rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; department of pediatric cardiology, rajaie cardiovascular medical and research center, vali-asr st., niayesh blvd, tehran, ir iran. tel: +98-9144465190 nasrin alaee rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran zahra akbarzadeh rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran

conclusions we did not find significant differences in ventricular function or ventricular septal thickness in the fetuses of mothers who were referred to our hospital with a previous diagnosis of diabetes mellitus compared with the fetuses of non-diabetic mothers. this could be due to early identification, appropriate treatment, and tightly controlled diabetes in our study population. it shoul...

Journal: :iranian journal of radiology 0
yeliz pekcevik department of radiology, tepecik training and research hospital, izmir, turkey; department of radiology, tepecik training and research hospital, izmir, turkey. tel: +90-2324696969, fax: +90-2324330756 mehmet onur kahya department of radiology, tepecik training and research hospital, izmir, turkey ahmet kaya department of orthopaedic surgery, tepecik training and research hospital, izmir, turkey

conclusion our preliminary results have shown that although there is some overlap between benign and malignant tumors, adding dwi, mr imaging to routine soft tissue tumor protocols may improve diagnostic accuracy. results there was only one patient with a malignant cystic tumor and was not included in the statistical analysis. the median adc values of benign and malignant tumors were 2.31 ± 1.2...

Journal: :Journal of biomedical optics 2014
M Caroline Müllenbroich Ewan J McGhee Amanda J Wright Kurt I Anderson Keith Mathieson

We have developed a nonlinear adaptive optics microscope utilizing a deformable membrane mirror (DMM) and demonstrated its use in compensating for system- and sample-induced aberrations. The optimum shape of the DMM was determined with a random search algorithm optimizing on either two photon fluorescence or second harmonic signals as merit factors. We present here several strategies to overcom...

2008
E. M. Jung L. Prantl A. G. Schreyer N. Zorger S. Feuerbach C. Fellner

Currently there is no image-guided modality which is sufficient and exact enough to evaluate the perfusion of tissue in its different layers after transplantation of microvascular flaps. Examination of capillary filling after compression (refill) allows merely a vague estimation. The cutaneous blood flow can be shown with different methods of fluoroscopy, but the perfusion of deeper tissue laye...

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