The post on May 7 at 9.12am was made during ESTRO when I was logged into one of the terminals on the Vision RT booth. It was not posted by me and I have no experience with this vendor’s open mask.
Vision RT do not make specific recommendations regarding which masks to use, which are good and which are not. We are completely vendor neutral so please ignore this ‘recommendation’. However, we do run validation tests with various mask vendors to ensure that their open masks allow us to track accurately. A list of validated masks can be obtained by contacting Vision RT directly.