Dr. Justus F. Ilgner Profile

Dr. Justus F. Ilgner

Deputy Head, Dept. of Otorhinolaryngology at Uniklinik RWTH Aachen

SPIE Involvement:

Conference Chair | Editor | Author

Area of Expertise:

Therapeutic applications of lasers in medicine , Diagnostic applications of lasers in medicine

Websites:

Company Website

Profile Summary

Dr. Justus Ilgner attended his medical course in Aachen / Germany, and Manchester, UK, between 1985 and 1992. He graduated from Aachen University of Technology in December 1992 and entered his career in Otorhinolaryngology at the University Hospital Aachen. He became a board certified specialist in Otorhinolaryngology in April 1997 and a Senior Registrar in November 1998. Sub-specialization in Plastic Surgery for the Head and Neck followed in April 2004. He became a board certified instructing surgeon for Plastic Surgery of the Head and Neck in 2004 and Deputy Head of the Department in June 2006. His surgical work covers the whole field of Ear, Nose and Throat including Head and Neck. His research interests are laser surgery, optical diagnostics, biomaterials for middle ear reconstruction and 3D visualization of microsurgery for educational purposes.

Publications (19)

Proceedings Article | 15 March 2024 Presentation

Presentation

Microsurgical master-slave robotic system with 3D exoscope to perform microvascular surgery in vascularized free tissue transfer

Justus Ilgner, Stephan Hackenberg, Thien Duong Dinh

Proceedings Volume PC12818, (2024) https://doi.org/10.1117/12.3003108

KEYWORDS: Surgery, Tissues, Robotic systems, Tumors, Visualization, Resection, Neck, Microscopes, Ischemia, Control systems

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Proceedings Article | 12 March 2013 Paper

Paper

Is the use of 55" LCD 3D screen practicable in large seminar to lecture hall size audiences?

Justus Ilgner, Ingo Sparrer, Martin Westhofen

Proceedings Volume 8648, 86481E (2013) https://doi.org/10.1117/12.2005836

KEYWORDS: Video, 3D displays, Cameras, LCDs, Microscopes, Surgery, Microsurgery, Ear, Sensors, Stereoscopic displays

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Proceedings Article | 3 March 2010 Paper

Paper

Femtosecond laser microstructuring and bioactive nanocoating of titanium surfaces in relation to chondrocyte growth

Justus Ilgner, Slavomir Biedron, Elena Fadeeva, Boris Chichkov, Doris Klee, Anneke Loos, Eveline Sowa-Söhle, Martin Westhofen

Proceedings Volume 7548, 75482Y (2010) https://doi.org/10.1117/12.847361

KEYWORDS: Titanium, Nano coatings, Femtosecond phenomena, Ear, Tissues, Proteins, Molecules, Natural surfaces, Coating, Interfaces

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Proceedings Article | 18 February 2010 Paper

Paper

What every surgeon wants: practical aspects on the use of stereoscopic applications in operative theatres

Justus Ilgner, Slavomir Biedron, Martin Westhofen

Proceedings Volume 7524, 752402 (2010) https://doi.org/10.1117/12.840340

KEYWORDS: Surgery, Video, Visualization, LCDs, Image processing, Cameras, Microscopes, Projection systems, Stereoscopic displays, Glasses

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Introduction: Many operative specialties rely on the use of microscopes and endoscopes for visualizing operative fields in minimally invasive or microsurgical interventions. Conventional optical devices present relevant details only to the surgeon or one assisting professional. Advances in information technology have propagated stereoscopic visual information to all operative theatre personnel in real time, which, in turn, adds to the load of complex technical devices to be handled and maintained in operative theatres. Material and methods: In the last six years, we have been using conventional (SD, 720 x 576 pixels) and high definition (1280 x 720 pixels) stereoscopic video cameras attached to conventional operative microscopes either in parallel to direct visualization of the operative field or as all-digital processing of the operative image for the surgeon including all other staff. Aspects included the type of display used, image quality, time delay due to image processing, visual comfort, time consumption in set-up, ease of use as well as robustness of the system. Results: General acceptance of stereoscopic display technology is high as all staff members are able to share the same visual information. The use of stereo cameras in parallel to direct visualization or as only visualization device mostly depended on image quality and personal preference of the surgeon. Predominant general factors are robustness, ease of use and additional time consumption imposed by setup and handling. Visual comfort was noted as moderately important as there was wide variability between staff members. Type of display used and post-processing issues were regarded less important. Time delay induced by the video chain was negligible. Conclusion: The additional information given by stereoscopic video processing in real time outweighs the extra effort for handling and maintenance. However, further integration with existing technology and with the general workflow enhances acceptance especially in units with high turnover of operative procedures.

Proceedings Article | 17 July 2009 Paper

Paper

Femtosecond laser microstructuring of titanium surfaces for middle ear ossicular replacement prosthesis: results of preliminary studies

S. Biedron, J. F. R. Ilgner, E. Fadeeva, B. Chichkov, A. Prescher, M. Bovi, M. Westhofen

Proceedings Volume 7373, 73731A (2009) https://doi.org/10.1117/12.831883

KEYWORDS: Titanium, Ear, Natural surfaces, Tissues, Femtosecond phenomena, Cartilage, Collagen, Laser therapeutics, Surgery, In vitro testing

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Proceedings Article | 23 February 2009 Paper

Paper

Femtosecond laser microstructuring of titanium surfaces for middle ear ossicular replacement prosthesis

Justus Ilgner, Slavomir Biedron, Elena Fadeeva, Boris Chichkov, Martin Westhofen

Proceedings Volume 7161, 71611X (2009) https://doi.org/10.1117/12.806691

KEYWORDS: Titanium, Tissues, Ear, Femtosecond phenomena, Natural surfaces, Manufacturing, Coating, Cartilage, Interfaces, Chemical vapor deposition

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Proceedings Article | 17 February 2009 Paper

Paper

From bench to bedside: stereoscopic imaging in experimental and clinical otology

Justus Ilgner, Slavomir Biedron, Manfred Bovi, Elena Fadeeva, Martin Westhofen

Proceedings Volume 7237, 723702 (2009) https://doi.org/10.1117/12.807186

KEYWORDS: Titanium, Ear, Video, Tissues, Cameras, Surgery, Natural surfaces, Stereoscopy, Head, Scanning electron microscopy

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Proceedings Article | 29 February 2008 Paper

Paper

Teaching microsurgery to undergraduate medical students by means of high-definition stereo video microscopy: the Aachen skills lab experience

Justus Ilgner, Jonas Jae-Hyun Park, Martin Westhofen

Proceedings Volume 6803, 680313 (2008) https://doi.org/10.1117/12.763867

KEYWORDS: Surgery, Ear, Microscopes, Video, Head, Stereoscopic cameras, Projection systems, Optical filters, Cameras, Microsurgery

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Proceedings Article | 5 March 2007 Paper

Paper

Using a high-definition stereoscopic video system to teach microscopic surgery

Justus Ilgner, Jonas Jae-Hyun Park, Daniel Labbé, Martin Westhofen

Proceedings Volume 6490, 649008 (2007) https://doi.org/10.1117/12.714148

KEYWORDS: Surgery, Video, Microscopes, LCDs, Projection systems, Head, Stereoscopy, Glasses, Image resolution, Cameras

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Introduction: While there is an increasing demand for minimally invasive operative techniques in Ear, Nose and Throat surgery, these operations are difficult to learn for junior doctors and demanding to supervise for experienced surgeons. The motivation for this study was to integrate high-definition (HD) stereoscopic video monitoring in microscopic surgery in order to facilitate teaching interaction between senior and junior surgeon. Material and methods: We attached a 1280x1024 HD stereo camera (TrueVisionSystems^TM Inc., Santa Barbara, CA, USA) to an operating microscope (Zeiss ProMagis, Zeiss Co., Oberkochen, Germany), whose images were processed online by a PC workstation consisting of a dual Intel® Xeon® CPU (Intel Co., Santa Clara, CA). The live image was displayed by two LCD projectors @ 1280x768 pixels on a 1,25m rear-projection screen by polarized filters. While the junior surgeon performed the surgical procedure based on the displayed stereoscopic image, all other participants (senior surgeon, nurse and medical students) shared the same stereoscopic image from the screen. Results: With the basic setup being performed only once on the day before surgery, fine adjustments required about 10 minutes extra during the operation schedule, which fitted into the time interval between patients and thus did not prolong operation times. As all relevant features of the operative field were demonstrated on one large screen, four major effects were obtained: A) Stereoscopy facilitated orientation for the junior surgeon as well as for medical students. B) The stereoscopic image served as an unequivocal guide for the senior surgeon to demonstrate the next surgical steps to the junior colleague. C) The theatre nurse shared the same image, anticipating the next instruments which were needed. D) Medical students instantly share the information given by all staff and the image, thus avoiding the need for an extra teaching session. Conclusion: High definition stereoscopy bears the potential to compress the learning curve for undergraduate as well as postgraduate medical professionals in minimally invasive surgery. Further studies will focus on the long term effect for operative training as well as on post-processing of HD stereoscopy video content for off-line interactive medical education.

Proceedings Article | 27 January 2006 Paper

Paper

Evaluation of stereoscopic medical video content on an autostereoscopic display for undergraduate medical education

Justus Ilgner, Takashi Kawai, Takashi Shibata, Takashi Yamazoe, Martin Westhofen

Proceedings Volume 6055, 605506 (2006) https://doi.org/10.1117/12.647591

KEYWORDS: Video, Surgery, Autostereoscopic displays, LCDs, Cartilage, Video processing, Glasses, CRTs, Visualization, Ear

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Introduction: An increasing number of surgical procedures are performed in a microsurgical and minimally-invasive fashion. However, the performance of surgery, its possibilities and limitations become difficult to teach. Stereoscopic video has evolved from a complex production process and expensive hardware towards rapid editing of video streams with standard and HDTV resolution which can be displayed on portable equipment. This study evaluates the usefulness of stereoscopic video in teaching undergraduate medical students. Material and methods: From an earlier study we chose two clips each of three different microsurgical operations (tympanoplasty type III of the ear, endonasal operation of the paranasal sinuses and laser chordectomy for carcinoma of the larynx). This material was added by 23 clips of a cochlear implantation, which was specifically edited for a portable computer with an autostereoscopic display (PC-RD1-3D, SHARP Corp., Japan). The recording and synchronization of left and right image was performed at the University Hospital Aachen. The footage was edited stereoscopically at the Waseda University by means of our original software for non-linear editing of stereoscopic 3-D movies. Then the material was converted into the streaming 3-D video format. The purpose of the conversion was to present the video clips by a file type that does not depend on a television signal such as PAL or NTSC. 25 4th year medical students who participated in the general ENT course at Aachen University Hospital were asked to estimate depth clues within the six video clips plus cochlear implantation clips. Another 25 4th year students who were shown the material monoscopically on a conventional laptop served as control. Results: All participants noted that the additional depth information helped with understanding the relation of anatomical structures, even though none had hands-on experience with Ear, Nose and Throat operations before or during the course. The monoscopic group generally estimated resection depth to much lesser values than in reality. Although this was the case with some participants in the stereoscopic group, too, the estimation of depth features reflected the enhanced depth impression provided by stereoscopy. Conclusion: Following first implementation of stereoscopic video teaching, medical students who are inexperienced with ENT surgical procedures are able to reproduce depth information and therefore anatomically complex structures to a greater extent following stereoscopic video teaching. Besides extending video teaching to junior doctors, the next evaluation step will address its effect on the learning curve during the surgical training program.

SPIE Journal Paper | 1 January 2006 Open Access

Open Access

Morphological effects of nanosecond- and femtosecond-pulsed laser ablation on human middle ear ossicles

Justus Ilgner, Martin Wehner, Johann Lorenzen, Manfred Bovi, Martin Westhofen

JBO, Vol. 11, Issue 01, 014004, (January 2006) https://doi.org/10.1117/12.10.1117/1.2166432

KEYWORDS: Laser ablation, Laser therapeutics, Ear, Surgery, Laser systems engineering, Laser cutting, Nd:YAG lasers, Laser vision correction, Bone, Tissues

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Proceedings Article | 25 April 2005 Paper

Paper

Feasibility of coblation versus laser resection in recurrent nasal polyps

Justus Ilgner, Karsten Schramm, Philip Duwel, Andreas Donner, Martin Westhofen

Proceedings Volume 5686, (2005) https://doi.org/10.1117/12.591067

KEYWORDS: Surgery, Laser therapeutics, Tissues, Nd:YAG lasers, Laser ablation, Continuous wave operation, Laser tissue interaction, Laser vision correction, Safety, Negative feedback

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Proceedings Article | 13 July 2004 Paper

Paper

Morphological effects of nanosecond- and femtosecond- pulsed laser ablation on human middle ear ossicles

Justus Ilgner, Martin Wehner, Johann Lorenzen, Manfred Bovi, Martin Westhofen

Proceedings Volume 5312, (2004) https://doi.org/10.1117/12.529564

KEYWORDS: Laser ablation, Ear, Surgery, Pulsed laser operation, Laser systems engineering, Tissues, Laser therapeutics, Er:YAG lasers, Femtosecond phenomena, Nd:YAG lasers

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Proceedings Article | 21 May 2004 Paper

Paper

Production and evaluation of stereoscopic video presentation in surgical training

Justus Ilgner, Takashi Kawai, Martin Westhofen, Takashi Shibata

Proceedings Volume 5291, (2004) https://doi.org/10.1117/12.524274

KEYWORDS: Video, LCDs, CRTs, Surgery, Visualization, Video processing, Glasses, Microscopes, Digital video recorders, Camera shutters

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Proceedings Article | 12 September 2003 Paper

Paper

Experience with a new micro-applicator for laser surgery of recurrent polypous sinusitis

Justus Ilgner, Martin Westhofen

Proceedings Volume 4949, (2003) https://doi.org/10.1117/12.476476

KEYWORDS: Fiber lasers, Surgery, Laser therapeutics, Laser vision correction, Wound healing, Laser applications, Laser tissue interaction, Endoscopes, Laser energy, Nd:YAG lasers

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Proceedings Article | 17 June 2002 Paper

Paper

Clinical and histological evaluation of wound healing in the paranasal sinus mucosa following neodymium:YAG laser therapy

Justus Ilgner, Oliver Emmerling, Stefan Biesterfeld, Martin Westhofen

Proceedings Volume 4609, (2002) https://doi.org/10.1117/12.430667

KEYWORDS: Laser therapeutics, Surgery, Wound healing, Nd:YAG lasers, Tissues, Laser vision correction, Laser tissue interaction, Laser ablation, Pathogens, Bone

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Proceedings Article | 28 June 2000 Paper

Paper

Reuults of submucosal laser turbinotomy with the neodymium:YAG laser

Oliver Emmerling, Justus Ilgner, Martin Westhofen

Proceedings Volume 4166, (2000) https://doi.org/10.1117/12.389484

KEYWORDS: Nd:YAG lasers, Surgery, Laser energy, Glasses, Fiber lasers, Head, Laser therapeutics, Endoscopy, Laser tissue interaction, Laser vision correction

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Proceedings Article | 28 June 2000 Paper

Paper

Neodymium:YAG laser therapy for recurrent chronic polypous sinusitis: is it safe?

Justus Ilgner, Oliver Emmerling, Martin Westhofen

Proceedings Volume 4166, (2000) https://doi.org/10.1117/12.389485

KEYWORDS: Laser therapeutics, Surgery, Nd:YAG lasers, Tissues, Laser tissue interaction, Endoscopy, Glasses, Laser ablation, Wound healing, Laser vision correction

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Proceedings Article | 28 June 2000 Paper

Paper

Neodymium:YAG laser in postoperative follow-up after endonasal pansinus operation

Martin Westhofen, Justus Ilgner, Stefan Handt

Proceedings Volume 4166, (2000) https://doi.org/10.1117/12.389488

KEYWORDS: Endoscopy, Laser therapeutics, Surgery, Nd:YAG lasers, Optical fibers, Laser vision correction, Fiber lasers, Laser tissue interaction, Laser development, Tissues

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Showing 5 of 19 publications

Proceedings Volume Editor (19)

SPIE Conference Volume | 22 March 2024

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2024

SPIE Conference Volume | 14 April 2023

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2023

SPIE Conference Volume | 28 March 2022

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2022

SPIE Conference Volume | 23 April 2021

Photonic Therapeutics and Diagnostics in Dentistry, Head and Neck Surgery, and Otolaryngology

SPIE Conference Volume | 6 March 2020

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2020

Showing 5 of 19 publications

Conference Committee Involvement (21)

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2025

25 January 2025 | San Francisco, California, United States

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2024

27 January 2024 | San Francisco, California, United States

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2023

28 January 2023 | San Francisco, California, United States

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2022

22 January 2022 | San Francisco, California, United States

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2021

6 March 2021 | Online Only, California, United States

Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2020

1 February 2020 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2019

2 February 2019 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology 2018

27 January 2018 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

28 January 2017 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

13 February 2016 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

7 February 2015 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

1 February 2014 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

2 February 2013 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Head and Neck Surgery and Otolaryngology

21 January 2012 | San Francisco, California, United States

Optical Imaging, Therapeutics, and Advanced Technology in Otolaryngology and Head and Neck Surgery

22 January 2011 | San Francisco, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

23 January 2010 | San Francisco, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

24 January 2009 | San Jose, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

19 January 2008 | San Jose, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

20 January 2007 | San Jose, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

21 January 2006 | San Jose, California, United States

Advanced Technology and Instrumentation in Otolaryngology: Lasers, Optics, Radio Frequency, and Related Technology

22 January 2005 | San Jose, CA, United States

Showing 5 of 21 Conference Committees

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