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   Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame  
   
نویسنده nakazawa h. ,tsugawa t. ,mori y. ,hagiwara m. ,komori m. ,hashizume c. ,shibamoto y. ,kobayashi t.
منبع journal of radiation research - 2014 - دوره : 55 - شماره : 6 - صفحه:1192 -1198
چکیده    Skull frame attachment is one of the most significant issues with gamma knife radiosurgery. because of the potential for suffering by patients,careful control of the frame position is required to avoid circumstances such as collision between the frame or the patient's head and the collimator helmet,and inaccessible target coordinates. this study sought to develop a simulation method to find the appropriate frame location on the patient's head by retrospective analysis of treatment plans for brain metastasis cases. to validate the accuracy of the collision warning,we compared the collision distance calculated using leksell gammaplan (lgp) with actual measured distances. we then investigated isocenter coordinates in near-collision cases using data from 844 previously treated patients and created a clearance map by superimposing them on ct images for just the frame,post and stereotactic fiducial box. the differences in distance between the simulation in lgp and the measured values were <1.0 mm. in 177 patients,213 lesions and 461 isocenters,there was a warning of one possible collision. the clearance map was helpful for simulating appropriate skull frame placement. the clearance simulation eliminates the psychological stress associated with potential collisions,and enables more comfortable treatment for the patient. © the author 2014. published by oxford university press on behalf of the japan radiation research society and japanese society for radiation oncology.
کلیدواژه Collision warning; Gamma Knife; Simulation; Skull frame placement; Stereotactic localization; Stereotactic radiosurgery
آدرس department of radiological sciences,nagoya university,graduate school of medicine,1-1-20 daikominami,higashi,nagoya,aichi,461-8673,japan,nagoya radiosurgery center,nagoya kyoritsu hospital,nagoya, Japan, nagoya radiosurgery center,nagoya kyoritsu hospital,nagoya, Japan, department of radiology and radiation oncology,aichi medical university,nagakute, Japan, nagoya radiosurgery center,nagoya kyoritsu hospital,nagoya, Japan, department of radiological sciences,nagoya university,graduate school of medicine,1-1-20 daikominami,higashi,nagoya,aichi,461-8673, Japan, nagoya radiosurgery center,nagoya kyoritsu hospital,nagoya, Japan, department of radiology,nagoya city university,graduate school of medical sciences,nagoya, Japan, nagoya radiosurgery center,nagoya kyoritsu hospital,nagoya, Japan
 
     
   
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