A new head holder for reducing axial movement and repositioning errors during physiological CT imaging.
| Autor: | Shrawder S; Department of Biomedical Engineering, IL 60201., Lapin GD, Allen CV, Vick NA, Groothuis DR |
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| Jazyk: | angličtina |
| Zdroj: | Journal of computer assisted tomography [J Comput Assist Tomogr] 1994 Mar-Apr; Vol. 18 (2), pp. 329-36. |
| DOI: | 10.1097/00004728-199403000-00036 |
| Abstrakt: | Objective: We designed a new head holder for immobilization and repositioning in dynamic CT studies of the brain. Materials and Methods: A customized thermoplastic face mask and foam head rest were made to restrict movement of the head in all directions, but particularly out of the axial plane (z-movement). Results: This design provided a rigid, detailed mold of the face and back of the head that minimized motion during lengthy CT studies and enabled accurate repositioning of the head for follow-up studies. Markers applied directly to the skin were used to quantify z-movement. Conclusion: When tested on 12 subjects, immobilization was limited to < 2.0 mm under worst-case conditions when the subject was asked to attempt forced movements. Repositioning was accurate to < 1.5 mm when the subject was removed from the head holder and then placed back into it. |
| Databáze: | MEDLINE |
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