Dr. Christiaan F. P. van Swol Profile

Dr. Christiaan F. P. van Swol

Physicist at St Antonius Ziekenhuis Nieuwegein

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 23 February 2009 Paper

Bladder cancer diagnosis during cystoscopy using Raman spectroscopy

M. C. M. Grimbergen, C. F. P. van Swol, R. O. P. Draga, P. van Diest, R. M. Verdaasdonk, N. Stone, J. H. L. R. Bosch

Proceedings Volume 7161, 716114 (2009) https://doi.org/10.1117/12.807811

KEYWORDS: Raman spectroscopy, Tissues, Pathology, Bladder, Bladder cancer, Biopsy, Signal to noise ratio, Endoscopy, Tumors, Statistical analysis

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SPIE Journal Paper | 1 July 2006 Open Access

Imaging techniques for research and education of thermal and mechanical interactions of lasers with biological and model tissues

Rudolf Verdaasdonk, Christiaan van Swol, Matthijs Grimbergen, Alex Rem

JBO, Vol. 11, Issue 04, 041110, (July 2006) https://doi.org/10.1117/12.10.1117/1.2338817

KEYWORDS: Tissues, Laser tissue interaction, Temperature metrology, Optical filters, Surgery, Thermography, Laser therapeutics, Thermal effects, Pulsed laser operation, Schlieren techniques

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Proceedings Article | 22 February 2006 Paper

Feasibility of Raman spectroscopy in vitro after 5-ALA-based fluorescence diagnosis in the bladder

M. Grimbergen, C. van Swol, R. van Moorselaar, A, Mahadevan-Jansen, N. Stone

Proceedings Volume 6078, 60781D (2006) https://doi.org/10.1117/12.655616

KEYWORDS: Raman spectroscopy, Biopsy, Luminescence, Bladder, Tissues, Tumors, In vitro testing, Algorithm development, Bladder cancer, Pathology

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Proceedings Article | 1 June 2001 Paper

Ultrasonic needle system for transmyocardial revascularization: mechanism of action and efficacy compared with laser modalities

Rudolf Verdaasdonck, Henk Cobelens, Christiaan van Swol, Matthijs Grimbergen, Stephen Fry

Proceedings Volume 4247, (2001) https://doi.org/10.1117/12.427847

KEYWORDS: Tissues, Ultrasonics, Cavitation, Laser systems engineering, Surgery, Ultrasonography, Titanium, Laser tissue interaction, Thermal effects, Natural surfaces

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Proceedings Article | 21 May 2001 Paper

Photodynamic diagnosis (PDD) of bladder cancer with intravesical 5-aminolevulinic-acid-induced fluorescence

Matthijs Grimbergen, T. Jonges, M. Tycho Lock, Christiaan van Swol, Tom Boon, R. Jeroen van Moorselaar

Proceedings Volume 4244, (2001) https://doi.org/10.1117/12.427813

KEYWORDS: Luminescence, Tumors, Bladder, Biopsy, Bladder cancer, Cystoscopy, Endoscopy, Diagnostics, Light sources, Light

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Proceedings Article | 22 June 1999 Paper

Laser- and electrosurgery as a treatment modality of BPH: urodynamic evaluation of seven different techniques in 280 patients

Christiaan van Swol, Ger van Venrooij, Mardy Eckhardt, Matthijs Grimbergen, Rudolf Verdaasdonck, Tom Boon

Proceedings Volume 3590, (1999) https://doi.org/10.1117/12.350999

KEYWORDS: Prostate, Tissues, Laser tissue interaction, Bladder, Fiber lasers, Visualization, Ultrasonography, Holmium, Laser therapeutics, Nd:YAG lasers

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Proceedings Article | 14 June 1999 Paper

Thermal imaging of laser-tissue interaction using color Schlieren techniques quantified by ray-tracing simulation

Rudolf Verdaasdonck, Rogier Lodder, Christiaan van Swol, Matthijs Grimbergen

Proceedings Volume 3601, (1999) https://doi.org/10.1117/12.349999

KEYWORDS: Refractive index, Temperature metrology, Optical filters, Thermography, Water, Refraction, Laser tissue interaction, Schlieren techniques, Image filtering, Visualization

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Proceedings Article | 19 May 1999 Paper

Mechanism of action of the ultrasonic tissue resectors disclosed using high-speed and thermal imaging techniques

Rudolf Verdaasdonck, Dennis Balgobind, Christiaan van Swol, Matthijs Grimbergen

Proceedings Volume 3594, (1999) https://doi.org/10.1117/12.348741

KEYWORDS: Tissues, Cavitation, Ultrasonics, Surgery, Ultrasonography, Liquids, Thermography, Natural surfaces, Titanium, Visualization

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Proceedings Article | 1 July 1998 Paper

Optimization of dosimetry and safety using the holmium laser for urology

Christiaan van Swol, Rudolf Verdaasdonck, Bram Zeijlemaker, Matthijs Grimbergen, Tom Boon

Proceedings Volume 3245, (1998) https://doi.org/10.1117/12.312277

KEYWORDS: Tissues, Skin, Laser tissue interaction, Laser welding, Continuous wave operation, Pulsed laser operation, Holmium, Carbon dioxide lasers, Natural surfaces, Bladder

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Proceedings Article | 5 June 1998 Paper

Design and realization of a fiber delivery system for the continuous-wave and pulsed CO2 laser

Ad de Snaijer, Rudolf Verdaasdonck, Matthijs Grimbergen, Christiaan van Swol

Proceedings Volume 3262, (1998) https://doi.org/10.1117/12.309463

KEYWORDS: Carbon dioxide lasers, Fiber lasers, Coating, Waveguides, Shape memory alloys, Surgery, Carbon dioxide, Tissues, Silica, Endoscopes

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Proceedings Article | 13 May 1998 Paper

Correlation of thermal and mechanical effects of the holmium laser for various clinical applications

Matthijs Grimbergen, Rudolf Verdaasdonck, Christiaan van Swol

Proceedings Volume 3254, (1998) https://doi.org/10.1117/12.308150

KEYWORDS: Tissues, Thermal effects, Natural surfaces, Laser tissue interaction, Holmium, Laser therapeutics, Surgery, Pulsed laser operation, Liquids, Laser applications

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Proceedings Article | 2 April 1998 Paper

Tissue effects of argon gas flow during electrosurgery

Christiaan van Swol, Remco van Vliet, Matthijs Grimbergen, Rudolf Verdaasdonck

Proceedings Volume 3249, (1998) https://doi.org/10.1117/12.304362

KEYWORDS: Tissues, Argon, Electrodes, In vitro testing, Visualization, Schlieren techniques, Physics, Natural surfaces, Surgery, Resistance

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Proceedings Article | 2 April 1998 Paper

High-speed and thermal imaging of the mechanism of action of the cavitron ultrasonic surgical aspirator (CUSA)

Rudolf Verdaasdonck, Christiaan van Swol, Matthijs Grimbergen, Gert Priem

Proceedings Volume 3249, (1998) https://doi.org/10.1117/12.304333

KEYWORDS: Tissues, Cavitation, Ultrasonics, Surgery, Natural surfaces, Visualization, Video, Thermography, Schlieren techniques, Metals

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Proceedings Article | 16 June 1997 Paper

Prostate on the menu: an overview of cooking techniques and clinical outcome

Christiaan van Swol, Rudolf Verdaasdonck, Ger van Venrooij, Tom Boon

Proceedings Volume 2975, (1997) https://doi.org/10.1117/12.275488

KEYWORDS: Tissues, Prostate, Fiber lasers, Laser tissue interaction, Nd:YAG lasers, Ultrasonography, Bladder, Tissue optics, In vitro testing, Laser ablation

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Proceedings Article | 16 June 1997 Paper

Search for a clinical cookbook: understanding the recipe for heat applications in surgical procedures

Rudolf Verdaasdonck, Christiaan van Swol

Proceedings Volume 2975, (1997) https://doi.org/10.1117/12.275484

KEYWORDS: Laser tissue interaction, Tissues, Pulsed laser operation, Optical fibers, Thermal effects, Carbon dioxide lasers, Fiber lasers, Continuous wave operation, Clinical research, Laser therapeutics

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Proceedings Article | 16 June 1997 Paper

Prediction of the ablation effect of ultrapulsed CO2 laser systems in clinical procedures

Matthijs Grimbergen, Rudolf Verdaasdonck, Christiaan van Swol

Proceedings Volume 2975, (1997) https://doi.org/10.1117/12.275485

KEYWORDS: Laser ablation, Laser tissue interaction, Carbon dioxide lasers, Pulsed laser operation, Laser damage threshold, Tissues, Continuous wave operation, Thermal effects, Laser systems engineering, Systems modeling

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Proceedings Article | 22 May 1997 Paper

Laser-assisted neuroendoscopy using Nd:YAG and diode contact laser with black fiber tips

Rudolf Verdaasdonck, Peter Vandertop, Wessel Ansink, Christiaan van Swol

Proceedings Volume 2970, (1997) https://doi.org/10.1117/12.275094

KEYWORDS: Tissues, Fiber lasers, Semiconductor lasers, Nd:YAG lasers, Laser development, Endoscopy, Natural surfaces, Laser ablation, Thermography, Diodes

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Proceedings Article | 17 May 1996 Paper

Vaporization and coagulation potentials of the new electrosurgical rollerbar devices for transurethral prostatectomy as compared to contact laser fibers

Christiaan van Swol, Robert-Jan Hillenius, Remco van Vliet, Rudolf Verdaasdonck, Tom Boon

Proceedings Volume 2671, (1996) https://doi.org/10.1117/12.240035

KEYWORDS: Tissues, Laser tissue interaction, Fiber lasers, Standards development, Electrodes, Prostate, Nd:YAG lasers, Laser development, Thermography, Copper

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Proceedings Article | 7 May 1996 Paper

Ablation range of focusing delivery devices coupled to pulsed CO2 lasers: implications for intracorporeal application

Rudolf Verdaasdonck, Christiaan van Swol

Proceedings Volume 2681, (1996) https://doi.org/10.1117/12.239575

KEYWORDS: Tissues, Laser ablation, Carbon dioxide lasers, Beam shaping, Tissue optics, Laser therapeutics, Microscopes, Gaussian beams, Thermal effects, Natural surfaces

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For intracorporeal CO₂ laser surgery, the laser beam is usually delivered through long focal length optics coupled to an operating microscope or an endoscope. While the target tissue is in focus for viewing, the power density in the spot of the beam can be affected by defocusing or irradiating tissue under a small angle of incidence. When the beam is used to drill a channel (e.g. transmyocardial revascularization, TMR), the power density along the beam will determine the shape of the channel. The area for effective ablation was studied for an ultra-pulsed CO₂ laser beam in combination with devices accommodating optics with focal lengths of 120 to 450 mm. The position of the ablation threshold along the waist of the beam in water and crater depths in (model) tissue were determined in relation to pulse energy (1 to 250 mJ) and angle of incidence. The crater formation during ablation of the model tissue and lateral thermal effects were recorded using fast photography and a thermal-imaging method based on Schlieren techniques. Using Gaussian beam theory, the ablation area in the beam of these optical systems was calculated. For the highest energies, the ablation area extended over a length up to 60 mm resulting in the formation of channels of similar length within several pulses. In the waist of the beam, the channels were only 100 - 300 micrometers with minimal thermal effects laterally. Away from the focus, more pulses were needed, larger diameter channels were formed and thermal effects became more pronounced. The theoretical predicted ablation area was in correspondence with of the measurements. For the beam delivery devices studied, tissue effects are along the `depth of focus' of viewing due to the relatively long `ablation waist' of the focused laser beam. However, for superficial applications, the depth of the narrow ablation craters is hard to appreciate and tissues in the depth can easily be perforated. Ablation is more controlled using larger spot sizes (> 0.5 mm) and delivering intermitted pulses with energies above ablation threshold.

Proceedings Article | 22 May 1995 Paper

Characterization of handpieces to control tissue ablation with pulsed CO2 laser

Rudolf Verdaasdonck, Christiaan van Swol, Judith Coates

Proceedings Volume 2391, (1995) https://doi.org/10.1117/12.209902

KEYWORDS: Tissues, Laser tissue interaction, Laser ablation, Carbon dioxide lasers, Laser damage threshold, Beam shaping, Pulsed laser operation, Collimation, Gaussian beams, Continuous wave operation

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Proceedings Article | 12 May 1995 Paper

Monitoring of the quality of side-firing fibers using a special design power meter: Aquarius

Christiaan van Swol, Rudolf Verdaasdonck, Fidel Hermans, Remco van Vliet, Tom Boon

Proceedings Volume 2395, (1995) https://doi.org/10.1117/12.209057

KEYWORDS: Optical fibers, Power meters, Tissues, Sensors, Metals, Fiber lasers, Laser tissue interaction, Mirrors, Laser therapeutics, Head

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Proceedings Article | 1 May 1995 Paper

What makes a fiber tip do the job: an optical and thermal evaluation study

Rudolf Verdaasdonck, Christiaan van Swol

Proceedings Volume 2396, (1995) https://doi.org/10.1117/12.208419

KEYWORDS: Laser tissue interaction, Fiber lasers, Thermography, Tissues, Natural surfaces, Metals, Reflectors, Tissue optics, Laser ablation, Pulsed laser operation

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Proceedings Article | 23 December 1994 Paper

Evaluation of laser prostatectomy devices by thermal imaging

David Molenaar, Remco van Vliet, Christiaan van Swol, Tom Boon, Rudolf Verdaasdonck

Proceedings Volume 2327, (1994) https://doi.org/10.1117/12.197606

KEYWORDS: Metals, Thermography, Reflection, Laser beam diagnostics, Absorption, Mirrors, Medical laser equipment, Calibration, Laser applications, Thermal effects

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Proceedings Article | 22 December 1994 Paper

Optical characteristics of side-firing fibers for laser prostatectomy

Remco van Vliet, David Molenaar, Christiaan van Swol, Tom Boon, Rudolf Verdaasdonck

Proceedings Volume 2328, (1994) https://doi.org/10.1117/12.197517

KEYWORDS: Optical fibers, Reflection, Tissues, Tissue optics, Metals, Sensors, Measurement devices, Reflectors, Water, Power meters

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Proceedings Article | 17 August 1994 Paper

Contribution of photothermal and photomechanical effects during tissue ablation by the XeCl-excimer laser

Rudolf Verdaasdonck, Petra Vos, Ton van Leeuwen, Cornelius Borst, Christiaan van Swol

Proceedings Volume 2134, (1994) https://doi.org/10.1117/12.182952

KEYWORDS: Optical fibers, Tissues, Laser tissue interaction, Laser ablation, Photothermal effect, Tissue optics, Fiber lasers, Pulsed laser operation, Monte Carlo methods, Optical properties

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For the XeCl-excimer (308 nm, 115 ns) laser the contribution of photo-thermal and photo- mechanical processes was studied during the penetration of aortic tissue by bare fibers in dependence of fiber diameter, exerted force, pulse repetition rate, and fluence. Though, theoretically, Monte-Carlo simulation shows that the light penetration depth is diameter dependent for fibers up to 550 micrometers , experimentally, tissue penetration was not affected when the fiber diameter increased from 300 to 950 micrometers . Also the change in optical properties of tissue due to denaturation did not affect the penetration behavior significantly. Fiber tissue penetration increased when the exerted force increased, but it started only after a series of 5 - 20 initial pulses. The penetration per pulse became only slightly larger increasing the pulse repetition rate from 2 to 60 Hz while the tissue temperature rise near the fiber was up to 60 degrees. Increasing the temperature of the surrounding tissue itself prior to laser exposure only slightly affected tissue penetration in the case of both normal and denatured tissue. Delivery of laser energy in successive pulse trains, accelerated penetration after the first train. Close-up, high speed video recording showed the presence of rapidly expanding, short-life (50 - 150 microsecond(s) ) vapor bubbles, in the first instance on top of the tissue surface and later in the tissue itself while the fiber was penetrating the tissue. From our measurements and observations it is inferred that the mechanical effect of the bubble is especially important for the penetration of the fiber into the tissue. Theory suggests that the energy is deposited in a 100 - 200 micrometers layer in front of the fiber where the temperature is instantly increased to above boiling temperature inducing a rapid expanding vapor bubble. The mechanical force of the bubble breaks down tissue structures to small pieces creating a channel for the fiber to penetrate the tissue. So the formation of water vapor seems to be the dominant mechanism for tissue ablation.

Proceedings Article | 28 July 1994 Paper

Multifiber excimer laser catheter design strategies for various medical applications

Rudolf Verdaasdonck, Christiaan van Swol, Ton van Leeuwen, Cees Tulleken, Tom Boon

Proceedings Volume 2131, (1994) https://doi.org/10.1117/12.180704

KEYWORDS: Tissues, Excimer lasers, Laser development, Laser ablation, Tissue optics, Arteries, Natural surfaces, Laser tissue interaction, Laser therapeutics, Pulsed laser operation

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Proceedings Article | 2 May 1994 Paper

Influence of prostatic blood flow on laser prostatectomy

Christiaan van Swol, Rudolf Verdaasdonck, Jaap Mooibroek, Tom Boon

Proceedings Volume 2129, (1994) https://doi.org/10.1117/12.175017

KEYWORDS: Tissues, Blood circulation, Laser tissue interaction, Prostate, Blood vessels, Tissue optics, Temperature metrology, Monte Carlo methods, Optical properties, Process modeling

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Proceedings Article | 2 May 1994 Paper

Physical evaluation of laser prostatectomy devices

Christiaan van Swol, Rudolf Verdaasdonck, Jaap Mooibroek, Tom Boon

Proceedings Volume 2129, (1994) https://doi.org/10.1117/12.175043

KEYWORDS: Tissue optics, Thermography, Tissues, Thermal modeling, Instrument modeling, Light scattering, Laser tissue interaction, Fiber lasers, Prostate, Ultrasonography

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Proceedings Article | 28 May 1993 Paper

In-vitro and clinical evaluation of transurethral laser-induced prostatectomy (TULIP)

Christiaan van Swol, Rudolf Verdaasdonck, Jaap Mooibroek, Tom Boon

Proceedings Volume 1879, (1993) https://doi.org/10.1117/12.146222

KEYWORDS: Tissues, Prostate, In vitro testing, Laser therapeutics, Tissue optics, Thermal modeling, Nd:YAG lasers, Laser vision correction, Surgery, Monte Carlo methods

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Proceedings Article | 1 June 1992 Paper

Spherical diffusing probes for high-peak-power copper vapor/dye laser systems

Rudolf Verdaasdonck, Christiaan van Swol, Tom Boon

Proceedings Volume 1645, (1992) https://doi.org/10.1117/12.60942

KEYWORDS: Diffusers, Spherical lenses, Optical fibers, Copper, Laser systems engineering, Copper vapor lasers, Laser therapeutics, Scattering, Photodynamic therapy, Light scattering

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Proceedings Article | 1 June 1991 Paper

Laser lithotripsy with a pulsed dye laser: correlation between threshold energy and optical properties

Hericus Sterenborg, Christiaan van Swol, Dane Bicanic, Martin van Gemert

Proceedings Volume 1427, (1991) https://doi.org/10.1117/12.44109

KEYWORDS: Acoustics, Laser damage threshold, Dye lasers, Laser tissue interaction, Optical properties, Scattering, Light scattering, Laser lithotripsy, Diffusion, Absorption

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