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.