Isocenter - Wikipedia
WEBIn imaging physics and radiation oncology, the isocenter is termed as the point in space through which the central rays of the radiation beams pass. In radiation oncology there is typically talk of two isocenters: radiation isocenter and; mechanical isocenter.
Isocentric technique - Wikipedia
WEBAn isocentric technique is where all beams used in a radiation treatment have a common focus point, a.k.a. the isocenter. Isocentric techniques require less patient repositioning as multiple field arrangements can be delivered with gantry and collimator movements, reducing treatment times.
Isocenter in MRI | MRI Isocenter advantages and disadvantages
WEBThe term “isocenter” in Magnetic Resonance Imaging (MRI) refers to the precise center point within the magnetic field of the MRI scanner. This point is particularly important because it represents the area where the magnetic field is most uniform and where the gradients are most linear.
Positions of radiation isocenter and the couch rotation center ...
WEBThe radiation isocenter is a nexus of points established by the intersection of the central axis of the radiation beam as it rotates with gantry angle. These shifts are a consequence of the movement in space of the collimator delimitation of the beam, which occurs because the gantry bends and twists under the force of gravity.
Isocenter - an overview | ScienceDirect Topics
WEBIsocenter is an important CT scanning protocol parameter and refers to positioning the patient at the geometric center of the CT gantry aperture.
Isocenter verification for linac‐based stereotactic radiation …
WEBNov 15, 2011 · In this paper, a systematic review has been carried out to discuss the present methods for isocenter verification and compare their characteristics, to help physicists in making a decision on selection of their quality assurance routine. PACS numbers: 87.53.Ly, 87.56.Fc, 87.56.-v.
Quantifying isocenter measurements to establish clinically …
WEBMar 8, 2015 · Individual contributors to uncertainty, specifically, daily positioning setup errors, gantry sag, multileaf collimator (MLC) offset, and couch walkout, were isolated from isocenter congruency measurements to determine a …
On the measurement of radiation isocenter for medical …
WEBNov 15, 2023 · The radiation isocenter is defined as the centre of the smallest sphere that all straight lines pass through or are tangent. Determining the radiation isocenter involves calculating its size (radius) and distance (offset) to a predetermined point in space in relation to the mechanical isocenter.
Master Breast Radiation Planning: Simple Guide for Radiation …
WEBAbstract. This article focuses on various aspects of breast radiation treatment planning, from simulation to field design. It covers the most common techniques including tangents, mono isocentric, dual isocentric, electron-photon match, and VMAT.
Isocenter verification for linac‐based stereotactic radiation …
WEBNov 15, 2011 · There have been several manual, semi‐automatic and fully‐automatic methods proposed for verification of the position of mechanical isocenter as part of comprehensive quality assurance programs required for linear accelerator‐based stereotactic radiosurgery/radiotherapy (SRS/SRT) treatments.