Prof. Dr. med. Georg Michelson (original) (raw)

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Papers by Prof. Dr. med. Georg Michelson

Research paper thumbnail of Automated Segmentation of the Optic Radiation Using Diffusion Tensor Imaging in Glaucoma Patients

Investigative Ophthalmology & Visual Science, Apr 28, 2009

Research paper thumbnail of A Novel System to Evaluate Stereo Vision by Polarized Dual-Projection

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Novel Stereo Vision Test for Far Distances Measuring Perception Time as a Function of Disparity in a Virtual Environment

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of No-reference wavelet based Retinal Image Quality Assessment

CRC Press eBooks, Oct 14, 2015

Research paper thumbnail of Axonal Integrity and Myelin Damage in the Optic Radiation Depend on Age in Healthy Subjects - A DT-MRI Analysis

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Glaucoma Classification based on Diffusion Tensor Imaging Derived Measures in the Optic Radiation

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Extraction of an Age-Related Biomarker From Retinal Images Using Appearance Based Approach

Investigative Ophthalmology & Visual Science, May 10, 2007

Research paper thumbnail of A Preprocessing Framework for Low-Cost Retinal Fundus Images

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of Multiscale Approach for Blood Vessel Segmentation on Retinal Fundus Images

Investigative Ophthalmology & Visual Science, Apr 28, 2009

Research paper thumbnail of Blood velocity in the ophthalmic artery in normal subjects and patients with endophthalmitis

PubMed, Sep 1, 1990

Some ocular diseases lead to temporary changes in the ocular blood circulation. This study was un... more Some ocular diseases lead to temporary changes in the ocular blood circulation. This study was undertaken to evaluate changes in the blood-flow velocity of the ophthalmic artery in patients with endophthalmitis. With pulsed Doppler sonography the blood velocity of the ophthalmic artery was measured in 50 normal subjects and in ten patients with bacterial endophthalmitis. In normal subjects blood velocity decreased with increasing age, and the average systolic/diastolic blood velocity in cm/sec were 38.8 +/- 6.3/11.6 +/- 4.7 in the 18-50-year-old age group and 28.3 +/- 4.6/6.7 +/- 3.3 in the 51-88-year-old age group. Endophthalmitis produced increased systolic/diastolic blood velocity in the ophthalmic artery in the affected eyes in cm/sec (99.7 +/- 15.5/26.6 +/- 10.5 in the 16-50-year-old age group; 60.4 +/- 8.8/16.6 +/- 4.8 in the 51-83-year-old age group). Some patients showed similar changes in the unaffected fellow eyes. The noted elevation of the blood velocity in unaffected eyes may be due to the bilaterally projected parasympathetic fibers of the oculomotor nerve.

Research paper thumbnail of The Radial Diffusivity as a Measure of Myelin or Glial Damage Correlates With the Burk Linear Discriminant Function in Glaucoma

Investigative Ophthalmology & Visual Science, Apr 17, 2010

Research paper thumbnail of Automated Glaucoma Detection From Color Fundus Photographs

Investigative Ophthalmology & Visual Science, May 14, 2008

Research paper thumbnail of The Relation between Spatial-Temporal Contrast Sensitivity and Neuroradiological DTI Parameters of the Optic Radiation is Different between NTG and POAG Patients

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of Patientenserie 49–56

Research paper thumbnail of Computergestützter Arztbrief zur Kataraktchirurgie im Augenklinik-Kommunikationssystem (AKS)

Es besteht aus vielen Grunden eine starkere Notwendigkeit fur die exakte Dokumentation der Patien... more Es besteht aus vielen Grunden eine starkere Notwendigkeit fur die exakte Dokumentation der Patientendaten sowie der durchgefuhrten medizinischen Leistungen. Nach Einfuhrung von standardisierten Anamnese-, Befund- und Diagnosebogen („Erlanger Augenblatter“) und computergestutzter Erstellung standardisierter OP-Berichte („OPERA“) in unserer Klinik wird nun ein klinikinternes Computernetz aufgebaut (Augenklinik-Kommunikations-System, AKS). Wir verwenden ein PC-Netz (Novell-Netware 3.11, Windows 3.1) mit graphischer Benutzeroberflache und Mouse-Bedienung (MS-Windows 3.1). Der File Server (80486) weist eine Speicherkapazitat von 1 GB Festplatte auf mit einem RAM-Hauptspeicher von 16 MB. Die Speicherung der Datensatze erfolgt auf einer zentralen Datenbank (Paradox-Datenbank-Format). Unter Verwendung bereits zu diesem Patienten gespeicherten Daten sowie durch Auswahl einzelner Punkte standardisierter Auswahlmenues kann ein Arztbrief maschinell generiert werden, der in „Word fur Windows 2.0“ abgespeichert wird und damit mit den ublichen Textverarbeitungsprogrammen weiterverarbeitbar ist.

Research paper thumbnail of Automated Contour Line Drawing of the Optic Nerve Head Using HRT II Reflectivity Images and Coloured Fundus Images

Investigative Ophthalmology & Visual Science, May 1, 2006

Research paper thumbnail of Intravascular Oxygen Saturation in Retinal Vessels in Normals During Flicker

Investigative Ophthalmology & Visual Science, May 1, 2005

Purpose: To measure the oxygen saturation (SO 2 ) in retinal arterioles and venules in patients w... more Purpose: To measure the oxygen saturation (SO 2 ) in retinal arterioles and venules in patients with glaucomatous optic neuropathy. Methods: We examined SO 2 in retinal arterioles and venules simultaneously by imaging spectrometry. Oxygen saturation was evaluated according to the difference of the extinction spectra of haemoglobin and oxyhaemoglobin. The arteriovenous difference (avD) was calculated by (SO 2art -SO 2ven ). The optic nerve head topography was estimated by Heidelberg retinal tomography and the visual field using the Octopus G1. We examined one eye in each of 58 healthy persons (mean age 58.6 ± 10.7 years; mean rim area 1.52 ± 0.33 mm 2 ; mean defect 0.65 ± 1.31 dB; mean intraocular pressure [IOP] 18.5 ± 2.7 mmHg), 49 patients with normal-tension primary open-angle glaucoma (NTG) (mean age 63.0 ± 8.5 years; mean rim area 0.89 ± 0.34 mm 2 ; mean defect 5.4 ± 4.1 dB; mean IOP 19.2 ± 2.9 mmHg), and 45 patients with high-tension primary openangle glaucoma (POAG) (mean age 62.6 ± 10.3 years; mean rim area 0.97 ± 0.47 mm 2 ; mean defect 7.1 ± 6.4 dB; mean IOP 31.6 ± 10.8 mmHg). Results: The intraclass correlation coefficients of the SO 2 measurement were 0.82 (arteriole) and 0.59 (venule). In normal eyes, the SO 2art , SO 2ven and avD were 92.

Research paper thumbnail of Evaluation of an Automated Retinal Vessel Analysis System (ARVAS) for the Calculation of the Artery–to–Vein Diameter Ratio

Investigative Ophthalmology & Visual Science, May 1, 2006

Research paper thumbnail of Statistical Deformation Modeling of the Optic Disk

Investigative Ophthalmology & Visual Science, Apr 17, 2010

Research paper thumbnail of Arteriovenous Crossings Are More Sensitive Than Microalbuminuria for the Detection of Early Vascular Changes in Arterial Hypertension

Investigative Ophthalmology & Visual Science, Apr 17, 2010

Research paper thumbnail of Automated Segmentation of the Optic Radiation Using Diffusion Tensor Imaging in Glaucoma Patients

Investigative Ophthalmology & Visual Science, Apr 28, 2009

Research paper thumbnail of A Novel System to Evaluate Stereo Vision by Polarized Dual-Projection

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Novel Stereo Vision Test for Far Distances Measuring Perception Time as a Function of Disparity in a Virtual Environment

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of No-reference wavelet based Retinal Image Quality Assessment

CRC Press eBooks, Oct 14, 2015

Research paper thumbnail of Axonal Integrity and Myelin Damage in the Optic Radiation Depend on Age in Healthy Subjects - A DT-MRI Analysis

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Glaucoma Classification based on Diffusion Tensor Imaging Derived Measures in the Optic Radiation

Investigative Ophthalmology & Visual Science, Apr 22, 2011

Research paper thumbnail of Extraction of an Age-Related Biomarker From Retinal Images Using Appearance Based Approach

Investigative Ophthalmology & Visual Science, May 10, 2007

Research paper thumbnail of A Preprocessing Framework for Low-Cost Retinal Fundus Images

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of Multiscale Approach for Blood Vessel Segmentation on Retinal Fundus Images

Investigative Ophthalmology & Visual Science, Apr 28, 2009

Research paper thumbnail of Blood velocity in the ophthalmic artery in normal subjects and patients with endophthalmitis

PubMed, Sep 1, 1990

Some ocular diseases lead to temporary changes in the ocular blood circulation. This study was un... more Some ocular diseases lead to temporary changes in the ocular blood circulation. This study was undertaken to evaluate changes in the blood-flow velocity of the ophthalmic artery in patients with endophthalmitis. With pulsed Doppler sonography the blood velocity of the ophthalmic artery was measured in 50 normal subjects and in ten patients with bacterial endophthalmitis. In normal subjects blood velocity decreased with increasing age, and the average systolic/diastolic blood velocity in cm/sec were 38.8 +/- 6.3/11.6 +/- 4.7 in the 18-50-year-old age group and 28.3 +/- 4.6/6.7 +/- 3.3 in the 51-88-year-old age group. Endophthalmitis produced increased systolic/diastolic blood velocity in the ophthalmic artery in the affected eyes in cm/sec (99.7 +/- 15.5/26.6 +/- 10.5 in the 16-50-year-old age group; 60.4 +/- 8.8/16.6 +/- 4.8 in the 51-83-year-old age group). Some patients showed similar changes in the unaffected fellow eyes. The noted elevation of the blood velocity in unaffected eyes may be due to the bilaterally projected parasympathetic fibers of the oculomotor nerve.

Research paper thumbnail of The Radial Diffusivity as a Measure of Myelin or Glial Damage Correlates With the Burk Linear Discriminant Function in Glaucoma

Investigative Ophthalmology & Visual Science, Apr 17, 2010

Research paper thumbnail of Automated Glaucoma Detection From Color Fundus Photographs

Investigative Ophthalmology & Visual Science, May 14, 2008

Research paper thumbnail of The Relation between Spatial-Temporal Contrast Sensitivity and Neuroradiological DTI Parameters of the Optic Radiation is Different between NTG and POAG Patients

Investigative Ophthalmology & Visual Science, Mar 26, 2012

Research paper thumbnail of Patientenserie 49–56

Research paper thumbnail of Computergestützter Arztbrief zur Kataraktchirurgie im Augenklinik-Kommunikationssystem (AKS)

Es besteht aus vielen Grunden eine starkere Notwendigkeit fur die exakte Dokumentation der Patien... more Es besteht aus vielen Grunden eine starkere Notwendigkeit fur die exakte Dokumentation der Patientendaten sowie der durchgefuhrten medizinischen Leistungen. Nach Einfuhrung von standardisierten Anamnese-, Befund- und Diagnosebogen („Erlanger Augenblatter“) und computergestutzter Erstellung standardisierter OP-Berichte („OPERA“) in unserer Klinik wird nun ein klinikinternes Computernetz aufgebaut (Augenklinik-Kommunikations-System, AKS). Wir verwenden ein PC-Netz (Novell-Netware 3.11, Windows 3.1) mit graphischer Benutzeroberflache und Mouse-Bedienung (MS-Windows 3.1). Der File Server (80486) weist eine Speicherkapazitat von 1 GB Festplatte auf mit einem RAM-Hauptspeicher von 16 MB. Die Speicherung der Datensatze erfolgt auf einer zentralen Datenbank (Paradox-Datenbank-Format). Unter Verwendung bereits zu diesem Patienten gespeicherten Daten sowie durch Auswahl einzelner Punkte standardisierter Auswahlmenues kann ein Arztbrief maschinell generiert werden, der in „Word fur Windows 2.0“ abgespeichert wird und damit mit den ublichen Textverarbeitungsprogrammen weiterverarbeitbar ist.

Research paper thumbnail of Automated Contour Line Drawing of the Optic Nerve Head Using HRT II Reflectivity Images and Coloured Fundus Images

Investigative Ophthalmology & Visual Science, May 1, 2006

Research paper thumbnail of Intravascular Oxygen Saturation in Retinal Vessels in Normals During Flicker

Investigative Ophthalmology & Visual Science, May 1, 2005

Purpose: To measure the oxygen saturation (SO 2 ) in retinal arterioles and venules in patients w... more Purpose: To measure the oxygen saturation (SO 2 ) in retinal arterioles and venules in patients with glaucomatous optic neuropathy. Methods: We examined SO 2 in retinal arterioles and venules simultaneously by imaging spectrometry. Oxygen saturation was evaluated according to the difference of the extinction spectra of haemoglobin and oxyhaemoglobin. The arteriovenous difference (avD) was calculated by (SO 2art -SO 2ven ). The optic nerve head topography was estimated by Heidelberg retinal tomography and the visual field using the Octopus G1. We examined one eye in each of 58 healthy persons (mean age 58.6 ± 10.7 years; mean rim area 1.52 ± 0.33 mm 2 ; mean defect 0.65 ± 1.31 dB; mean intraocular pressure [IOP] 18.5 ± 2.7 mmHg), 49 patients with normal-tension primary open-angle glaucoma (NTG) (mean age 63.0 ± 8.5 years; mean rim area 0.89 ± 0.34 mm 2 ; mean defect 5.4 ± 4.1 dB; mean IOP 19.2 ± 2.9 mmHg), and 45 patients with high-tension primary openangle glaucoma (POAG) (mean age 62.6 ± 10.3 years; mean rim area 0.97 ± 0.47 mm 2 ; mean defect 7.1 ± 6.4 dB; mean IOP 31.6 ± 10.8 mmHg). Results: The intraclass correlation coefficients of the SO 2 measurement were 0.82 (arteriole) and 0.59 (venule). In normal eyes, the SO 2art , SO 2ven and avD were 92.

Research paper thumbnail of Evaluation of an Automated Retinal Vessel Analysis System (ARVAS) for the Calculation of the Artery–to–Vein Diameter Ratio

Investigative Ophthalmology & Visual Science, May 1, 2006

Research paper thumbnail of Statistical Deformation Modeling of the Optic Disk

Investigative Ophthalmology & Visual Science, Apr 17, 2010

Research paper thumbnail of Arteriovenous Crossings Are More Sensitive Than Microalbuminuria for the Detection of Early Vascular Changes in Arterial Hypertension

Investigative Ophthalmology & Visual Science, Apr 17, 2010