Objective image quality parameters.

Notes: RSVC right superior vena cava, LSVC left superior vena cava, RPA right pulmonary artery, LPA left pulmonary artery. *LSVC was filled with thrombus in one patient, so LSVC was evaluated in nineteen patients.备注：RSVC（右上腔静脉，right superior vena cava）、LSVC（左上腔静脉，left superior vena cava）、RPA（右肺动脉，right pulmonary artery）、LPA（左肺动脉，left pulmonary artery）。* 1例患者的左上腔静脉内存在血栓充盈，因此最终对19例患者的左上腔静脉进行了评估。