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Malmqvist L, De Santiago L, Fraser C, Klistorner A, Hamann S. Exploring the methods of data analysis in multifocal visual evoked potentials. Doc Ophthalmol 2016; 133:41-8. [DOI: 10.1007/s10633-016-9546-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 06/09/2016] [Indexed: 11/24/2022]
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Sandberg Melin C, Malmberg F, Malmqvist L, Talebizadeh N, Yu Z, Söderberg P. Pigment epithelium central limit - Inner limit of the retina, Minimal Distance, PIMD, a morphometrical variable for glaucoma follow-up. Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- C. Sandberg Melin
- Gullstrand Lab-Opthalmology; Neuroscience; Uppsala University; Uppsala Sweden
- Region Gavleborg; Uppsala University; Gävle Sweden
| | - F. Malmberg
- Information Technology; Uppsala University; Uppsala Sweden
| | - L. Malmqvist
- Gullstrand Lab-Opthalmology; Neuroscience; Uppsala University; Uppsala Sweden
| | - N. Talebizadeh
- Gullstrand Lab-Opthalmology; Neuroscience; Uppsala University; Uppsala Sweden
| | - Z. Yu
- Gullstrand Lab-Opthalmology; Neuroscience; Uppsala University; Uppsala Sweden
| | - P. Söderberg
- Gullstrand Lab-Opthalmology; Neuroscience; Uppsala University; Uppsala Sweden
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Malmqvist L, Biering-Sørensen T, Bartholdy K, Krassioukov A, Welling KL, Svendsen JH, Kruse A, Hansen B, Biering-Sørensen F. Reponse to 'Estimating the autonomic function from heart rate variability in mechanically ventilated patients after spinal cord injury'. Spinal Cord 2015; 53:839-40. [PMID: 26032750 DOI: 10.1038/sc.2015.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- L Malmqvist
- Department of Spinal Cord Injuries, Rigshopitalet, Copenhagen, Denmark.,Department of Clinical Neurophysiology, Rigshopitalet, Copenhagen, Denmark
| | - T Biering-Sørensen
- Department of Spinal Cord Injuries, Rigshopitalet, Copenhagen, Denmark.,Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Cardiology, Gentofte Hospital, Copenhagen, Denmark
| | - K Bartholdy
- Department of Spinal Cord Injuries, Rigshopitalet, Copenhagen, Denmark
| | - A Krassioukov
- Department of Medicine, Division of Physical Medicine & Rehabilitation, ICORD, Vancouver, British Columbia, Canada.,Spinal Cord Program, GF Strong Rehabilitation Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - K-L Welling
- Department of Neuroanesthesiology, Rigshospitalet, Copenhagen, Denmark
| | - J H Svendsen
- Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
| | - A Kruse
- Spine Section, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen, Denmark
| | - B Hansen
- Department of Spinal Cord Injuries, Rigshopitalet, Copenhagen, Denmark
| | - F Biering-Sørensen
- Department of Spinal Cord Injuries, Rigshopitalet, Copenhagen, Denmark.,Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark
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Malmqvist L, Biering-Sørensen T, Bartholdy K, Krassioukov A, Welling KL, Svendsen JH, Kruse A, Hansen B, Biering-Sørensen F. Assessment of autonomic function after acute spinal cord injury using heart rate variability analyses. Spinal Cord 2014; 53:54-8. [DOI: 10.1038/sc.2014.195] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 08/12/2014] [Accepted: 09/29/2014] [Indexed: 11/09/2022]
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Malmqvist L, Hertz HM. Second-harmonic generation in optically trapped nonlinear particles with pulsed lasers. Appl Opt 1995; 34:3392-7. [PMID: 21052150 DOI: 10.1364/ao.34.003392] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Pulsed lasers are used for simultaneous single-beam three-dimensional optical trapping of and second-harmonic generation in 50-100-nm nonlinear particles. The emission power of the frequency-doubled light, the trapping stability, and the particle degradation are investigated for KTP and LiNbO(3) particles trapped by 25-kHz-repetition-rate Q-switched Nd:YAG and 76-MHz mode-locked Ti:sapphire l a s e r s . Typically 1 pW-10 nW of frequency-doubled light is detected from stably trapped particles. The particles may be used as probes for nonintrusively scanned near-field optical microscopy.
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Carlsson J, Hellentin P, Malmqvist L, Persson A, Persson W, Wahlström CG. Time-resolved studies of light propagation in paper. Appl Opt 1995; 34:1528-1535. [PMID: 21037692 DOI: 10.1364/ao.34.001528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A method for time-resolved recording of light scattering in thin, highly scattering media is described. Subpicosecond pulses from a high-power Ti:sapphire laser are used, and single-shot recordings of the scattered light are made with a fast streak camera. The method is applied to the study of light scattering in paper, and a 1-ps resolution is demonstrated. The dependence of the light scattering on the basis of weight and density of the paper has been studied. A white-light continuum generated from the high-power pulses by the use of self phase modulation in water is used to study the wavelength dependence of the scattering process. A model for the propagation of light in paper has been developed and used in Monte Carlo simulations. The experimental results are used for testing this model, and absorption and scattering parameters are determined from that comparison.
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Hertz H, Malmqvist L, Rosengren L, Ljungberg K. Optically trapped non-linear particles as probes for scanning near-field optical microscopy. Ultramicroscopy 1995. [DOI: 10.1016/0304-3991(94)00158-j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
We demonstrate a method for nonintrusive scanned near-field optical microscopy. The microscope utilizes an optical trap to position accurately a 50-100-nm-diameter lithium niobate particle. The infrared trapping beam is frequency doubled in the particle, resulting in a visible microscopic optical probe. By separation of the trapping and detection wavelengths, objects that are transparent in the infrared (e.g., biological) may be positioned close to the particle, resulting in high resolution. The current experimental resolution is limited to approximately 500 nm by the properties of the test objects. The theoretical resolution is less than 100 nm.
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