Johannes STAHL,Supratik BOSE,Jonathan MALTZ,Lu XU,Hao CHEN
申请号：
US16832110
公开号：
US20200222723A1
申请日:
2020.03.27
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A method and system for using in a two-modality apparatus. The two-modality apparatus comprises a couch with a table top, a first modality unit and a second modality unit. A second image of a target portion of an object when the table top is at a second working position of the second modality unit may be acquired. A second sag of the table top at a second measurement point of the table top according to the second image may be determined based on the image. A difference between a first sag of the table top at a first measurement point of the table top and the second sag may be estimated based on the second sag and standard data. The standard data provides a relationship relating to a sag of the table top positioned between the first modality unit and second modality unit.
