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Journal of Korean Neurosurgical Society 1998;27(5): 642-647. |
| Clinical Application of Frameless Stereotaxy "Viewing Wand": Its Usefulness and Limitation. |
| Soo Hyun Hwang, Hyung Jin Shin, Dong Ik Shin, Do Hyun Nam, Jong Soo Kim, Jung IL Lee, Seung Chyul Hong, Kwan Park, Whan Eoh, Jong Hyun Kim |
1Department of Neurosurgery, Samsung Medical Center, College of Medicine, Sung Kyun Kwan University, Seoul, Korea.
2Department of Neurosurgery, Kang-dong Sung-shin Hospital, College of Medicine, Hallym University, Seoul, Korea. |
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| ABSTRACT |
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The Viewing Wand is a frameless stereotactic device to provide image-based intraoperative navigation, allowing accurate neurosurgical planning and procedures. The authors applied the frameless stereotactic device called "ISG Viewing Wand" to 30 cases of intracranial lesions and evaluated for its usefulness and limitation. The Viewing Wand was used in 3 cases in conjunction with CT and 27 cases with MRI. The actual error of this system after the registration was judged by the operating surgeon to be less than 2mm in CT or MR image. The useful registrations were possible in 25(83%) out of 30 cases. But it was not useful in 5 cases, because of movement of fiducial markers in 2 cases and head movement after registration in 3 cases. In 25 cases having useful registration, the wand was helpful to localize the lesion for designing the scalp incision and bone flap, as well as the extent of surgical resection of lesions. As a whole, the viewing wand was found to be reliable and accurate. The system is a useful navigational aid that allows a direct approach to intracranial pathology without the drawbacks of application and the limitations of a frame-based stereotactic device. |
| Key Words:
Frameless stereotaxy; Viewing wand; Registration |
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