en face spectral domain optical coherence tomography imaging for the diagnosis
báo cáo khoa học: "Infrared imaging and spectral-domain optical coherence tomography findings correlate with microperimetry in acute macular neuroretinopathy: a case report" potx
Ngày tải lên :
10/08/2014, 22:20
... Infrared imaging showed the classic wedge-shaped defects and spectral- domain optical coherence tomography exhibited changes at the inner segment-outer segment junction, with a thickened outer plexiform ... correlating with the wedge-shaped defects in both eyes Conclusion: Spectral- domain optical coherence tomography findings provide new evidence of the involvement of the outer plexiform layer of the retina ... the area of OPL thickening The presence of OPL involvement confirms the disease process to the outer retina Consent Written informed consent was obtained from the patient for publication of this...
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Báo cáo khoa học : Tissue Doppler imaging for the diagnosis of coronary artery disease ppt
Ngày tải lên :
29/06/2014, 11:20
... diastole, respectively Therefore, mitral ring motion is in essence the sum of all longitudinal shortening and lengthening between the apex and the base Thus, ischemia in the apical region causes ... the tissue in between In the case that the two locations are getting closer there is myocardial shortening, and when they move apart there is lengthening Strain is calculated as the time integral ... rate imaging is strong sensitivity to misalignment between the cardiac axis and the echo beam Strains in the long axis are opposite to strains in the short axis, and when there is misalignment the...
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MEMS devices for circumferential scanned optical coherence tomography bio imaging
Ngày tải lên :
08/09/2015, 18:35
... element Ri The resistance of each element Sa The shape factor G The width of the beam of each element h The height of the beam gas The air gap between the beam and substrate wa The width of the beam ... air V The applied voltage h The finger thickness g The finger Gap l1 The length of T-spring vertical beam l2 The length of horizontal beam l3 The length of central bar l4 The length of central ... be achieved independent of the beam-focusing conditions The coherence length is the spatial width of the field autocorrelation produced by the interferometer The envelope of the field autocorrelation...
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High resolution, quantitative optical coherence tomography for tissue imaging
Ngày tải lên :
22/10/2015, 21:08
... where ω is the angular frequency of the light source, ω is the center frequency of the light source and σ ω is the spectral bandwidth Then optical intensity at the detector (refer to appendix A) ... Coefficient a1 Figure 3.31 Coefficient a Figure 3.32 Centre of spectrum at different offset from the centre of the lens Figure 3.33 Area of spectrum at different offset from the centre of the lens ... inside the envelope will limit their performance and degrade the envelope detection effects Experimental results show that about 1.5 oscillations inside the envelope is enough for them to extract the...
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Báo cáo y học: "Optical Coherence Tomography in ocular toxoplasmosis"
Ngày tải lên :
03/11/2012, 11:01
... 2009, 138 Figure 1: Optical Coherence Tomography in ocular toxoplasmosis References Puliafito CA, Hee MR, Lin CP, et al Imaging of macular diseases with optical coherence tomography Ophthalmology ... Antcliff RJ, Stanford MR, Chauhan DS, et al Comparison between optical coherence tomography and fundus fluorescein angiography for the detection of cystoid macular edema in patients with uveitis ... patients with uveitis Ophthalmology 2000; 107:593-9 Hassenstein A, Bialasiewicz AA, Richard G Optical coherence tomography in uveitis patients Am J Ophthalmol 2000; 130:669-70 Smit RL, Baarsma...
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OPTICAL COHERENCE TOMOGRAPHY ppt
Ngày tải lên :
07/03/2014, 11:20
... of the macula in amblyopic eyes by optical coherence tomography Int J Ophthalmol, Vol 5, No 2, pp.172-176 31 Chapter B-Scan and En- FaceSpectral -Domain Optical Coherence Tomography Imaging for the ... digita tions are seen at the level of the RPE and correspond to areas of thickened RPE (blue arrows) B-Scan and En- FaceSpectral -Domain Optical Coherence Tomography Imaging for the Diagnosis and ... in the superior part) 41 42 Optical Coherence Tomography In the macular area, en- face OCT shows the presence of multiple hyperreflective lesions above the level of the pigment epithelium These...
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Báo cáo y học: "High-resolution optical coherence tomographic imaging of osteoarthritic cartilage during open knee surgery" ppsx
Ngày tải lên :
09/08/2014, 06:22
... al.: Optical coherence tomography Science 1991, 254:1178-1181 10 Brezinski ME, Tearney GJ, Bouma BE, Izatt JA, Hee MR, Swanson EA, Southern JF, Fujimoto JG: Optical coherence tomography for optical ... ME, Fujimoto JG: Optical coherence tomography: advanced technology for the endoscopic imaging of Barrett's esophagus Endoscopy 2000, 32:921-930 21 Speer DP, Dahners L: The collagenous architecture ... registration During imaging, the probe did not contact the cartilage surface and the air distance between the probe and the cartilage surface was maintained at ~2.5 cm to insure that the imaged sites...
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Báo cáo y học: "Distribution of airway narrowing responses across generations and at branching points, assessed in vitro by anatomical optical coherence tomography" docx
Ngày tải lên :
12/08/2014, 14:20
... probe was encased in a transparent catheter (OD 2.2 mm) The catheter was inserted into the airway lumen, beginning at the cannula in the proximal end of the airway and extended down to the internal ... we provide the first information on narrowing at the entrance of the daughter airway and whether the presence of a side branch affects narrowing in the parent trunk The results of the analysis ... http://respiratory-research.com/content/11/1/9 to the lumen (3 × 10-4M) was 30-300 fold greater than that applied to the adventitial surface due to the high integrity of the epithelial barrier [24] Furthermore, as the rate...
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MEMS based catheter for endoscopic optical coherence tomography
Ngày tải lên :
14/09/2015, 08:41
... W S Chen, T K Chuah, N Chen, M Olivo and C J R Sheppard, “MEMS based nonrotatory circumferential scanning optical probe for endoscopic optical coherence tomography the Optical Coherence Tomography ... depends on the central wave length λ and bandwidth of the broadband light source Δλ and is independent of the focusing condition of the objective lens The axial resolution the coherence length ... challenge for endoscopic applications as there is a trade-off between the size of the probe and the quality of the OCT images Fig 1.3 illustrates the differences between the conventional bench top...
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báo cáo hóa học:" Research Article Resistivity Probability Tomography Imaging at the Castle of Zena, Italy" pdf
Ngày tải lên :
21/06/2014, 20:20
... fundamental equations for the potential from a current point source with appropriate sign for the current The formulae for evaluating the resistivity of the ground are a product of the impedance Δφ/I ... used for injecting a current of intensity I and two for detecting a voltage (potential difference) Δφ For all of the devices the theoretical solution is basically a superposition of the fundamental ... are the current electrodes to inject a current of intensity I into the ground M and N are the potential electrodes to measure the voltage Δφ The dipole length is a and k = 1, 2, determines the...
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Báo cáo y học: "The feasibility of axial and coronal combined imaging using multi-detector row computed tomography for the diagnosis and treatment of a primary spontaneous pneumothora" pps
Ngày tải lên :
10/08/2014, 09:21
... After inducing general anaesthesia with a double lumen intubation, the patient was placed in the lateral position on the operating table with the Results All patients had bullectomy performed through ... thoracotomy [11,12] Although the exact mechanism of recurrence is not known, the presence of identifiable ELCs may be the most common cause of recurrent pneumothorax [13] Therefore, the resection of as ... that the HRCT shortened the observation time of ELC recurrences The HRCT is clinically useful for the diagnosis of pneumothorax However, the conventional HRCT does not provide imaging of intervals...
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Báo cáo thú y: "Survey radiography and computerized tomography imaging of the thorax in female dogs with mammary tumors" pot
Ngày tải lên :
12/08/2014, 18:22
... positioned in ventral recumbency, when the initial image showed ventral atelectasis, the CT was repeated with the patient in dorsal recumbency to allow better inflation of these lung regions [8] The atelectatic ... procedure [25], since they are not presented radiographically Another cause of atelectasia is the transport of the patient under general anesthesia to the CT gantry in lateral recumbency [26] In a study ... administered intravenously, with the dogs positioned in sternal recumbency The lungs were not mechanically inflated for imaging The female dogs were placed in dorsal recumbency with the forelimbs pulled...
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Multimodal optical spectroscopy and imaging for improving cancer detection in the head and neck at endoscopy
Ngày tải lên :
09/09/2015, 10:09
... limitations for these conventional screening methods which have been discussed above render a demand for new cancer detection and diagnosis techniques Recently, optical diagnosis techniques have been ... frequency different from, and usually lower than, the frequency of the incident 19 photons In theory, the light interaction with a molecule leads to a polarization of the 20 molecule and then the ... In the equations, E0 and ν are the vibrational amplitude and frequency of the incident light, respectively The polarizability α is dependent upon the position of the nuclei in the molecule For...
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Tài liệu Role of diffusion-weighted imaging in the diagnosis of gynecological diseases pdf
Ngày tải lên :
13/02/2014, 06:20
... demonstrates the tumor as hypointensity and the normal myometrium as hyperintensity (arrow) The ADC value within the mass is 0.87×10–3 mm2/s potential usefulness in the differential diagnosis The cystic ... hypointensity in the center of the cystic component (arrow) b On T1-WI with fat suppression the area in the cystic component is hyperintense (c) On DWI with b = 1,000 s/mm2 the area in the cystic ... hyperintense mass in the endometrial area The DWI with b = 1,000 s/mm2 shows marked signal loss in the endometrial area c ADC map demonstrates the tumor as a heterogeneous hyperintensity The ADC...
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báo cáo khoa học: "Contribution of magnetic resonance imaging in the diagnosis of talus skip metastases of Ewing’s sarcoma of the calcaneus in a child: a case report" pdf
Ngày tải lên :
10/08/2014, 23:20
... treatment Consent Written informed consent was obtained from the father of our patient for publication of this case report and any accompanying images A copy of the written consent is available for ... specific diagnosis can rarely be established Therefore, a biopsy of the tumor with histopathological analysis is needed to confirm the diagnosis Staging, prior to biopsy, is essential to document the ... http://www.jmedicalcasereports.com/content/5/1/451 overestimated because of the presence of edema and hemorrhage [9] The enhancement pattern after administration of contrast medium on MRI allows differentiation between a tumor...
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báo cáo khoa học: "Structure and expression of the maize (Zea mays L.) SUN-domain protein gene family: evidence for the existence of two divergent classes of SUN proteins in plants" pot
Ngày tải lên :
11/08/2014, 11:21
... and the SUN domain was split between the exons On the other hand, the PM3 genes had 4-5 exons and a SUN domain that was encoded within the largest exon Comparative analysis of the maize ZmSUN gene ... Identification of Maize Genes Encoding Canonical C-terminal SUN -Domain (CCSD) Proteins A reference genome sequence was recently produced for the inbred line B73 (B73 RefGen_v1 [53]) The SUN genes described ... proteins, but their relationship to the SOGGs is not resolved by this phylogenetic analysis Plant genomes therefore appear to encode two different multigene subfamilies of SUNdomain proteins, the CCSD...
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Báo cáo y học: "F-18-fluorodeoxyglucose positron emission tomography-computed tomography for the diagnosis of Takayasu''''s arteritis in stroke: a case report" pptx
Ngày tải lên :
11/08/2014, 21:22
... approved the final manuscript Consent Written informed consent was obtained from the patient for publication of this case report and any accompanying images A copy of the written consent is available ... available for review by the Editor-in-Chief of this journal The authors declare that they have no competing interests References Authors' contributions C–AH and SI contributed to the care of the patient, ... point of maximal SUV for the diagnosis of vascular inflammation was estimated to be 1.3 with a sensitivity for TA of 90.9% and a specificity of 88.8% [8] Conclusion To the best of the authors' knowledge,...
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Optical coherence microscopy and focal modulation microscopy for real time deep tissue imaging
Ngày tải lên :
14/09/2015, 14:10
... linearly with time Therefore, the waveform also represents the dependence of the returned light intensity on the optical pathlength The light intensity is fairly constant except the narrow dips ... to the rotation axis, and then it is deflected by the RMA toward the retroreflector The optical axis of the retroreflector is aligned coincident with the beam from the RMA (at the moment when the ... frequency of the interferogram is proportional to the absolute value of the optical path-length difference Therefore, the optical path-length of the reference mirror must be placed outside the...
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báo cáo hóa học:" Optical imaging of the peri-tumoral inflammatory response in breast cancer" docx
Ngày tải lên :
18/06/2014, 15:20
... monocyte recruitment A technique based on the detection of fluorescence, optical imaging (OI) is a relatively new modality in the clinical setting Compared with other imaging modalities, optical http://www.translational-medicine.com/content/7/1/94 ... http://www.translational-medicine.com/content/7/1/94 imaging is inexpensive, easy and fast to perform, highly sensitive, and radiation-free In addition, breast cancer patients have been previously scanned using optical imaging; ... vivo, intravenously injecting them into experimental animals, and subsequently tracking the labeled cells with optical technology These scans have been used to detect and monitor treatment of arthritis...
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báo cáo khoa học: "Failure of functional imaging with gallium-68DOTA-D-Phe1-Tyr3-octreotide positron emission tomography to localize the site of ectopic adrenocorticotropic hormone secretion: a case report" ppsx
Ngày tải lên :
10/08/2014, 23:20
... ng/L), consistent with a diagnosis of ACTH-dependent Cushing’s syndrome Magnetic resonance imaging (MRI) of her pituitary gland did not reveal the presence of an adenoma Localizing the source of ... relationships Given the failure of medical therapy to control her symptoms, other potential treatment options were discussed with our patient These included progressing to bilateral adrenalectomy or ... localization of the site of ectopic ACTH may still not be possible Consent Written informed consent was obtained from the patient for publication of this case report and any Table Reported sensitivity...
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