A noninvasive thermoplastic head immobilization system

Pilipuf, Marc N.; Goble, John C.; Kassell, Neal F.

doi:10.3171/jns.1995.82.6.1082

Cited by 27 publications

(19 citation statements)

References 6 publications

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“…9,[16][17][18]23 The development of this MRI-compatible headholder with thin, lightweight flexible coils extends the application of the iMRI and the associated benefits to those patients for whom pin fixation is not feasible or safe. Head positioning and coil placement can also impact the quality of images; 5 however, to date no excessive spatial distortion or signal loss has been identified using this system.…”

Section: Discussionmentioning

confidence: 99%

Preliminary experience with an intraoperative MRI-compatible infant headholder: technical note

Boop

Bate²,

Choudhri

et al. 2015

PED

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The development of high-quality intraoperative MRI (iMRI) capability has offered a major advance in the care of patients with complex intracranial disease. To date, this technology has been limited by the need for pin fixation of the calvaria. The authors report their preliminary experience with an MRI-compatible horseshoe headrest that allows for the following: 1) iMRI in patients too young for pin fixation; 2) iMRI in patients with large calvarial defects; 3) the ability to move the head during iMRI surgery; and 4) the use of neuronavigation in such cases. The authors report 2 cases of infants in whom the Visius Surgical Theatre horseshoe headrest (IMRIS Inc.) was used. Image quality was equivalent to that of pin fixation. The infants suffered no skin issues. The use of neuronavigation with the system remained accurate and could be updated with the new iMRI information. The Visius horseshoe headrest offers a technical advance in iMRI technology for infants, for patients with cranial defects or prior craniotomies in whom pin fixation may not be safe, or for patients in whom the need to move the head during surgery is required. The image quality of the system remains excellent, and the ability to merge new images to the neuronavigation system is helpful.

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Section: Discussionmentioning

confidence: 99%

Preliminary experience with an intraoperative MRI-compatible infant headholder: technical note

Boop

Bate²,

Choudhri

et al. 2015

PED

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“…Different frameless stereotactic systems, including infrared camera guidance [4], dental [5-11], implanted fiducial markers [12,13], and mask fixation system [14-20] have been developed in the last two decades. An essential prerequisite of a frameless system is that patient fixation and positioning are performed with a high degree of accuracy in order to delivery a safe therapeutic radiation dose.…”

Section: Introductionmentioning

confidence: 99%

Fractionated stereotactic radiotherapy for skull base tumors: analysis of treatment accuracy using a stereotactic mask fixation system

et al. 2010

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BackgroundTo assess the accuracy of fractionated stereotactic radiotherapy (FSRT) using a stereotactic mask fixation system.Patients and MethodsSixteen patients treated with FSRT were involved in the study. A commercial stereotactic mask fixation system (BrainLAB AG) was used for patient immobilization. Serial CT scans obtained before and during FSRT were used to assess the accuracy of patient immobilization by comparing the isocenter position. Daily portal imaging were acquired to establish day to day patient position variation. Displacement errors along the different directions were calculated as combination of systematic and random errors.ResultsThe mean isocenter displacements based on localization and verification CT imaging were 0.1 mm (SD 0.3 mm) in the lateral direction, 0.1 mm (SD 0.4 mm) in the anteroposterior, and 0.3 mm (SD 0.4 mm) in craniocaudal direction. The mean 3D displacement was 0.5 mm (SD 0.4 mm), being maximum 1.4 mm. No significant differences were found during the treatment (P = 0.4). The overall isocenter displacement as calculated by 456 anterior and lateral portal images were 0.3 mm (SD 0.9 mm) in the mediolateral direction, -0.2 mm (SD 1 mm) in the anteroposterior direction, and 0.2 mm (SD 1.1 mm) in the craniocaudal direction. The largest displacement of 2.7 mm was seen in the cranio-caudal direction, with 95% of displacements < 2 mm in any direction.ConclusionsThe results indicate that the setup error of the presented mask system evaluated by CT verification scans and portal imaging are minimal. Reproducibility of the isocenter position is in the best range of positioning reproducibility reported for other stereotactic systems.

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“…Technisch basieren diese Systeme auf der Kombination einer reversiblen Patientenfixierung mit einem stereotaktischen Koordinatensystem [2,3,9,13]. Diese Fixierung erfolgt entweder durch ein plastisch formbares Maskenmaterial [10] oder durch die Fixierung eines festen anatomischen Punktes (Oberkiefer, äußerer Gehörgang [4,13,15]) am stereotaktischen Rahmen. Systematische Untersuchungen über die Lagerungsgenauigkeit dieser Systeme zeigen, dass die Präzision invasiver Fixierungssysteme erreicht wird [3,6,[10][11][12]16] und Lagerungsvariabilitäten von weniger als 2 mm erzielt werden können.…”

Section: Introductionunclassified

“…Diese Fixierung erfolgt entweder durch ein plastisch formbares Maskenmaterial [10] oder durch die Fixierung eines festen anatomischen Punktes (Oberkiefer, äußerer Gehörgang [4,13,15]) am stereotaktischen Rahmen. Systematische Untersuchungen über die Lagerungsgenauigkeit dieser Systeme zeigen, dass die Präzision invasiver Fixierungssysteme erreicht wird [3,6,[10][11][12]16] und Lagerungsvariabilitäten von weniger als 2 mm erzielt werden können. In der vorliegenden Arbeit wird der Einfluss einer Modifikation des kommerziell erhältlichen stereotaktischen BrainLab ® -Kopfmaskensystems [12] in Form einer zusätzlichen Kieferfixierung auf die Lagerungsgenauigkeit und -reproduzierbarkeit während einer fraktionierten Strahlentherapie untersucht. )…”

Section: Introductionunclassified

Verbesserte Lagerungsreproduzierbarkeit eines nichtinvasiven Hochpräzisionsmaskensystems in der stereotaktischen Radiotherapie durch eine integrierte Kieferfixierung

et al. 2003

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A noninvasive thermoplastic head immobilization system

Cited by 27 publications

References 6 publications

Preliminary experience with an intraoperative MRI-compatible infant headholder: technical note

Preliminary experience with an intraoperative MRI-compatible infant headholder: technical note

Fractionated stereotactic radiotherapy for skull base tumors: analysis of treatment accuracy using a stereotactic mask fixation system

Verbesserte Lagerungsreproduzierbarkeit eines nichtinvasiven Hochpräzisionsmaskensystems in der stereotaktischen Radiotherapie durch eine integrierte Kieferfixierung

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