New radiolucent head fixation made of engineering plastics for intraoperative CT scanning

Okudera, Hiroshi; Kobayashi, Sumio; Kyoshima, Kazuhiko; Tokushige, Kazuo; Sugita, Kenichiro

doi:10.1007/bf01808559

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…), the application of a combination of such systems seems to be an absolute imperative, not only for a successful operation (quality check, recalibration) but also in the total treatment procedure (work flow, quality control). 3,6,8,10,11,17 Saving time in the actual surgical treatment optimizes not only the clinical work flow (e.g., by eliminating patient transfer and transportation time) but also influences the overall long-term economy of effort by providing significantly increased efficiency. Intraoperative CT guided navigation should be used in the context of a closed system as described in this article.…”

Section: Resultsmentioning

confidence: 99%

Intraoperative computed tomography guided neuronavigation: Concepts, efficiency, and work flow

Matula

Rössler

Reddy

et al. 1998

Comput. Aided Surg.

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Image-guided surgery is currently considered to be of undisputed value in microsurgical and endoscopical neurosurgery, but one of its major drawbacks is the degradation of accuracy during frameless stereotactic neuronavigation due to brain and/or lesion shift. A computed tomography (CT) scanner system (Philips Tomoscan M) developed for the operating room was connected to a pointer device navigation system for image-guided surgery (Philips EasyGuide system) in order to provide an integrated solution to this problem, and the advantages of this combination were evaluated in 20 cases (15 microsurgical and 5 endoscopic). The integration of the scanner into the operating room setup was successful in all procedures. The patients were positioned on a specially developed scanner table, which permitted movement to a scanning position then back to the operating position at any time during surgery. Contrast-enhanced preoperative CCTs performed following positioning and draping were of high quality in all cases, because a radiolucent head fixation technique was used. The accuracy achieved with this combination was significantly better (1.6:1.22.2). The overall concept is one of working in a closed system where everything is done in the same room, and the efficiency of this is clearly proven in different ways. The most important fact is the time saved in the overall treatment process (about 55 h for one operating room over a 6-month period). The combination of an intraoperative CCT scanner with the pointer device neuronavigation system permits not only the intraoperative control of resection of brain tumors, but also (in about 20% of cases) the identification of otherwise invisible residual tumor tissue by intraoperative update of the neuronavigation data set. Additionally, an image update solves the problem of intraoperative brain and/or tumor shifts during image-guided resection. Having the option of making an intraoperative quality check at any time leads to significantly increased efficiency, improves the operating work flow because of the closed-system concept, and offers an integrated solution for improved patient work flow and clinical outcome.

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Section: Resultsmentioning

confidence: 99%

Intraoperative computed tomography guided neuronavigation: Concepts, efficiency, and work flow

Matula

Rössler

Reddy

et al. 1998

Comput. Aided Surg.

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“…The total mass attenuation coefficient (TMAC) µ m , which describes the amount of energy absorbed by a unit mass of material when the X-ray beam is passed through its thickness, is given by (3) where ρ is the density of the material.…”

Section: Radiographic Analysis Of Reinforced Polymer Compositesmentioning

confidence: 99%

“…The radiation dose at the ionization chamber (I x ) was recorded, and the attenuation coefficient (µ) per unit thickness of material was computed using Equation (2). Total mass attenuation coefficient (TMAC) was calculated according to Equation (3).…”

Section: Radiographic Analysis Of Reinforced Polymer Compositesmentioning

confidence: 99%

“…A newly developed head fixation system, for intraoperative computerized topographic (IOCT) scanning in hip surgery uses a carbon fiber reinforced plastic material for the head holder and frames, and polyamide for joints, screws, and head pins. The polymer composite components have adequate mechanical properties for clinical use and are radiolucent [3]. Radiolucency of vertebral cages and implants is also very important to enhance radiographic evaluation of bone fusion [4].…”

Section: Introduction X -Ray Radiographic Examination Of Bone Fracturmentioning

confidence: 99%

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Quantitative Radiographic Analysis of Fiber Reinforced Polymer Composites

et al. 2001

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X-ray radiographic examination of the bone fracture healing process is a widely used method in the treatment and management of patients. Medical devices made of metallic alloys reportedly produce considerable artifacts that make the interpretation of radiographs difficult. Fiber reinforced polymer composite materials have been proposed to replace metallic alloys in certain medical devices because of their radiolucency, light weight, and tailorable mechanical properties. The primary objective of this paper is to provide a comparable radiographic analysis of different fiber reinforced polymer composites that are considered suitable for biomedical applications. Composite materials investigated consist of glass, aramid (Kevlar-29), and carbon reinforcement fibers, and epoxy and polyether-ether-ketone (PEEK) matrices. The total mass attenuation coefficient of each material was measured using clinical X-rays (50 kev). The carbon fiber reinforced composites were found to be more radiolucent than the glass and kevlar fiber reinforced composites.

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“…It could also be modified for use in the operating room for iCT scanning. 4,13,20,21,25,26 Because of new CT technology, software and hardware and high-resolution scanning including intraoperative angiography and CT perfusion mapping are now available with low radiation exposure and very short scanning times compared with former techniques. This amazing technical development enables the surgeon to work within a closed intraoperative network based on an iCT navigation system; the surgeon is a fixed, integrated part of that network.…”

mentioning

confidence: 99%

Evaluation of new radiolucent polymer headholder pins for use in intraoperative computed tomography

Radina

Edlauer

Ardeshiri

et al. 2009

JNS

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New radiolucent head fixation made of engineering plastics for intraoperative CT scanning

Cited by 15 publications

References 13 publications

Intraoperative computed tomography guided neuronavigation: Concepts, efficiency, and work flow

Intraoperative computed tomography guided neuronavigation: Concepts, efficiency, and work flow

Quantitative Radiographic Analysis of Fiber Reinforced Polymer Composites

Evaluation of new radiolucent polymer headholder pins for use in intraoperative computed tomography

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