Marko and Ellen,
I would add (or caution) that vertebra match should be scrutinized as a good indicator for BH as the heart position is a compound motion during the BH. The primary reason for BH is to protect the heart and you have to be careful in making adjustments for BH level based on vertebral match alone. We take kVs on the first day under BH for rough verification of isocenter location and BH level but our final verification is always a tangential port with the heart and heart block relative positions indicating the proper BH and positioning after kV verification.
We find that we rarely have to make any adjustments away from the BH DICOM surface when evaluated against the kVs and/or the MV ports showing the heart and heart block locations.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.