Proposal for dosimetry of non-ionizing radiation

Dörschel, K.; Brodzinski, T.

doi:10.1007/bf02276699

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photocoagulation within a few seconds requires the power density of 100-1000 W/cm 2 [12,13]. The average power density of the spot was 170-370 W/cm 2 from 16.1 W at the source power of 50 W, that meets the minimum requirement.…”

Section: Discussionmentioning

confidence: 97%

A Coaxial Laser Endoscope with Arbitrary Spots in Endoscopic View for Fetal Surgery

Yamanaka

Yamashita

Masamune

et al. 2009

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2009

View full text Add to dashboard Cite

Abstract. In this paper, we describe a rigid endoscope that transmits a laser beam coaxially to arbitrary points in the endoscopic view, mainly for treatment of twin-to-twin transfusion syndrome. The endoscope consists of a hotmirror for coaxial transmission of visible light and a Nd:YAG laser beam, and galvanometers for controlling the beam irradiation angle. We evaluated the transmission efficiency of the laser power, the spot size through the endoscope and accuracy in positioning the beam. The maximum laser transmission efficiency was 39% and the spot diameter was 2.2-3.2 mm at a distance of 10-20 mm. The positioning accuracy was mostly within 1.0 mm in the endoscopic view at the distance. The average laser power density on the spot was estimated to be 170-370 W/cm 2 , and a chicken liver was successfully coagulated by changing the laser beam irradiation angle.

show abstract

Section: Discussionmentioning

confidence: 97%

A Coaxial Laser Endoscope with Arbitrary Spots in Endoscopic View for Fetal Surgery

Yamanaka

Yamashita

Masamune

et al. 2009

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2009

View full text Add to dashboard Cite

show abstract

“…The risk of unintentional damage of the healthy surrounding area can be minimized by improving the control of the ablation process. Tissue destruction as a function of time and temperature(19).…”

mentioning

confidence: 99%

Cardiovascular Laser Application

Schaldach

1990

Artificial Organs

View full text Add to dashboard Cite

With the invention of the laser, many clinical disciplines have taken advantage of this new energy source. Its precision, intensity and energy density is superior to all other known surgical devices. Based on the principle of light amplification from a photon‐emitting resonator, the monochromaticity, collimation and coherence provide the high‐energy density of the laser beam for medical applications. The state‐of‐the‐art and future potential of laser use in cardiovascular diseases will be reviewed. Most of the work in this field has been accomplished during the past decade with numerous research projects. Although many technical advances have been made, so far the results in cardiovascular medicine are in the areas of vessel anastomosis, ablation of conduction passes for arrhythmia therapy, and angioplasty. In this paper, special attention will be given to the recent success in XeCl excimer laser application for photodecomposition of tissue with a goal of improved recanalization. The high‐power density of the XeCl excimer laser provides significant advantages for the disruption of both embolic and calcified plaque. Regardless of the type of tissue ablated, gross, histologic, and ultra‐structural analysis confirmed the absence of thermal injury in luminar recanalization as well as in animal studies. Progress in the manufacture of catheters, with multiple very small diameter fibers, led to the decisive breakthrough in clinical laser angioplasty. Peripheral as well as coronary arteries have been successfully recanalized followed by balloon dilatation. The ease of application and the success achieved thus far have resulted in an optimistic assessment for laser medicine.

show abstract