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Preliminary alignment with an accuracy of about 80 μrad has been performed with laser alignment system and OTR screens used at the TTF accelerator for electron beam diagnostics.
We designed and constructed a target chamber with a precise target movement mechanism, a precise laser alignment system and an optical system.
Metzler, SD, Greer, KL, and Jaszczak, RJ. "Laser alignment system for helical pinhole SPECT". December 1 , 2003
Although a laser alignment system together with a dedicated arm-support system were used to ensure proper positioning, and co-registration results were visually verified, small co-registration discrepancies are likely to occur as the thorax area is highly flexible.
For each scan, the patient was positioned on a flat tabletop using a laser alignment system with both arms above the head in a dedicated radiotherapy arm-support system.
So, for co-registration of (functional) imaging to RT-planning CT scan data in HNSCC, we recommend improvements from our protocol to obtain a reproducible positioning, like the use of an immobilisation mask fixed to the SPECT table, the use of the same mattress under the patient and a laser alignment system.
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The working principles and performance of the laser-based alignment system are presented.
To develop a real-time alignment monitoring system (RAMS) to compensate for the limitations of the conventional room-laser-based alignment system.
We have constructed a laser-based alignment system (LBAS) which is a non-contact, high-precision alignment tool designed for applications where excellent spatial positioning must be achieved.
The hardware innovations regard to (i) the data acquisition system, (ii) the laser beam automatic alignment system, and (iii) the cell flow chamber.
This problem has been solved by means of installation of active alignment system with reference laser.
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