Using a real-time surface mapping system, MSK compared intra-fractional movement between a set of patients using an invasive Brown-Roberts-Wells stereotactic frame, and a set of patients using Aktina’s non-invasive PinPoint system with vacuum fixation.The observed motion between the sets of patients was reported to be virtually identical: 0.3 ± 0.2mm.

MSK concludes the paper with a definitive statement about the superiority of the Aktina PinPoint sytem over other existing non-invasive systems:

In this study, an average head-motion magnitude of 0.3±0.2 mm and 0.2±0.1 was achieved, which is better than a mask-based immobilization (0.7±0.5 mm)5 and various other head-immobilization devices.23,24

msk pinpoint paper.pdf - adobe acrobat 6282011 21808 pm-1
Nicholas G. Zacharopoulos
VP, Product Development, Aktina Medical Corporation

“We are thrilled that the community can see just how accurate PinPoint can be. What is even more interesting is that you don’t have to be MSK to use PinPoint – even small clinics and regional hospitals are reporting back the same type of feedback: rotational setup errors compared to thermoplastics have been virtually eliminated.”

Read more here: Med. Phys. 38, 3981 (2011)

 5 N. Ramakrishna, F. Rosca, S. Friesen, E. Tezcanli, P. Zygmanszki, and F. Hacker, “A clinical comparison of patient setup and intra-fraction motion using frame-based radiosurgery versus a frameless image-guided radiosurgery system for intracranial lesions,” Radiother. Oncol. 95, 109–115 (2010).

M. Engelsman, S. find owner of a domain J. Rosenthal, S. L. Michaud, J. A. Adams, R. J. Schneider, S. G. Bradley, J. B. Flanz, and H. site down M. Kooy, “Intra- and interfractional patient motion for a variety of immobilization devices,” Med. Phys. 32, 3468–3474 (2005).

24 T. C. Ryken, S. L. Meeks, E. C. Pennington, P. asking for a raise Hitchon, V. Traynelis, N. A. Mayr, F. J. Bova, W. A. Friedman, and J. M. Buatti, “Initial clinical experience with frameless stereotactic radiosurgery: Analysis of accuracy and feasibility,” Int. Radiat. Oncol., Biol., Phys. 51, 1152–1158 (2001).