Together with Mevion's 6D robotic treatment couch, it enables detailed imaging of the tumor and organs at risk with the patient positioned at the treatment
isocenter.
IMRT plans were designed to a planned total prescription dose at the
isocenter of 78 Gy in 39 fractions (66 Gy in 33 fractions to PTV1 with a boost of 12 Gy to PTV2).
Each pack contains a total of 250
isocenter and 250 line markers required.
Evaluation of
Isocenter Reproducibility in Telemedicine of 3D-Radiotherapy Treatment Planning.
Then value of planning
isocenter coordinate was altered in some direction to simulate inaccuracy of position of patients in actual treatment.
According to Ofix, the Encompass has been used for intracranial radiotherapy treatments for nearly a year and is now cleared to achieve sub-millimeter immobilisation to precisely treat multiple lesions with a single
isocenter.
However, the use of any conductive materials in the vicinity of the scanner's
isocenter must be limited because of the potential for induced eddy currents to locally deform the magnetic field homogeneity.
First, the patent should be positioned with the targeted region
isocenter in the gantry.
For future tests, special structures should be designed for every used head coil to position the phantom accurately to the
isocenter of the coil.
5 Gy at the
isocenter, administered in 3-10 fractions.
Another possibility is to physically mark the patient's new
isocenter subsequent to the image-guided shifts on a daily basis.
You just verify at the
isocenter with an image in IMRT.
