Contrast-enhanced intraoperative ultrasonography equipped with late Kupffer-phase image obtained by sonazoid in patients with colorectal liver metastases

Table 1 Preoperatively diagnosed sites of liver metastases by CT, MRI and CE-US, intraoperatively found lesions by IOUS and CE-IOUS, and intraoperatively newly found metastases by CE-IOUS

Patient	Preoperatively diagnosed metastases			Intraoperatively found lesions
No.	By CT	By MRI	By CE-US	By IOUS	By CE-IOUS	By CE-IOUS
1	S5, S5-6	S5, S5-6, S7	S5, S5-6	S5, S5-6	S5, S5-6, S7	S4
2	S3, S7	S3, S7	S3	S3	S3, S7	S6
3	S6, S6	S6, S6	S6, S6	S6, S6	S6, S6	(-)
4	S6-7, S1	S6-7	S6-7, S1	S6-7, S1	S6-7, S1	(-)
5	S7	S7	(-)	S7	S7	(-)
6	S7	S7	S7	S7	S7	(-)
7	S7-6, S3	S7-6, S3	S7-6, S3	S7-6, S3	S7-6, S3	(-)
8	S3, S4, S8	S3, S4, S8	S3, S4, S8	S3, S4, S8	S3, S4, S8	(-)

Table 2 Preoperatively planned surgical methods mainly performed surgical methods, and methods of additional surgery according to the findings of CE-IOUS

Patient No.	Preoperatively planned surgery	Mainly performed operative procedures	Methods of additional surgery based the findings of CE-IOUS
1	Enucleations at S5, S5-S6, and S7	Bisegmentectomy of S5 and S6	Enucleation at S4
		Enucleation at S7
2	Left lateral sectionectomy, partial resection of S7	Left lateral sectionectomy, partial resection of S7	Enucleation at S6
3	S6 segmentectomy	S6 segmentectomy	(-)
4	Right posterior sectionectomy, S1 partial resection	Right posterior sectionectomy, S1 partial resection	(-)
5	S7 partial resection	S7 partial resection	(-)
6	S7 segmentectomy	S7 segmentectomy	(-)
7	Posterior sectionectomy, left lateral sectionectomy	Posterior sectionectomy, left lateral sectionectomy	(-)
8	Enucleations at S3, S4, and S8	Enucleations at S3, S4, and S8	(-)