Journal article
Electro-optic imaging chain for a biplanar fluorscope for neurosurgery: magnetic field sensitivity and contrast measurements
Optical Engineering, Vol.32(7), pp.1644-1656
07/01/1993
DOI: 10.1117/12.138719
Abstract
The effects of magnetic fields on the microchannel plate (MCP) image intensifiers to be used in a novel biplanar fluoroscope are studied along with the system's overall contrast as a function of beam energy. For a second-generation device with wrap-around power supply, B-3dB values for the gain roll-off were found to be approximately 0.08 T (axial field) and 0.06 T (transverse field). The maximum image shift resuiting from a 0.0035-T transverse field is found to be 0.065 mm, limited by centroid location error resulting from low-dose x-ray noise. The results of x-ray contrast studies suggests that the presently estimated 0.1-rad dose delivered to the patient (2-h magnetic stereotaxis procedure; 12% "fluoro-on" duty cycle) might be reduced by increasing the x-ray energy.
Details
- Title: Subtitle
- Electro-optic imaging chain for a biplanar fluorscope for neurosurgery: magnetic field sensitivity and contrast measurements
- Creators
- P. A Ramos - Univ. of Virginia (USA)Stephen W Allison - Oak Ridge National Lab. (USA)J. A Molloy - Univ. of Virginia (USA)Michael A Lawson - Univ. of Virginia (USA)E. G Quate - Univ. of Virginia (USA)Rogers C Ritter - Univ. of Virginia (USA)George T Gilles - Univ. of Virginia (USA)Michael S Grady - Harborview Medical Ctr. (USA)Matthew A Howard III - Harborview Medical Ctr. (USA)
- Resource Type
- Journal article
- Publication Details
- Optical Engineering, Vol.32(7), pp.1644-1656
- DOI
- 10.1117/12.138719
- ISSN
- 0091-3286
- eISSN
- 1560-2303
- Language
- English
- Date published
- 07/01/1993
- Academic Unit
- Neurosurgery; Neurology; Iowa Neuroscience Institute; Otolaryngology
- Record Identifier
- 9984072045002771
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