Fig 1.
Volume calculation using SYNAPSE VINCENT.
Simple volume of each liver subsegment (S1–S8), calculated using the 3D volume analyzer SYNAPSE VINCENT.
Fig 2.
Standardized liver function (SLF) in patients with a normal liver (NL group) and those with an unresectable liver (UL group). The average values in the two groups were 2038 and 962 (FV/m2), respectively.
Fig 3.
(A) Calculation of the resection limit. The average SLF of the NL group (2038) was set as 70% resectable, and that of the UL group (962) as 0% resectable. The liver resection limit for patients undergoing hepatectomy (white circles) was calculated based on a SLF of 70%. (B) Resection limit calculated from the SLF. Both an average line and a 2SD line are displayed. The average line defines the “safety limit”, and the 2SD line the “maximum limit.” Accordingly, the area under the average line (light gray) is the “safety area”, and that between the 2SD line and the average line (dark gray) the “risk area”.
Table 1.
Characteristics of the patients in the normal liver (NL) and unresectable liver (UL) groups.
Fig 4.
Resection limit formula in validation set.
The SLF and the resected liver volume in the 50 patients included in the validation of the resection limit formula.
Table 2.
Characteristics of the 50 patients in the validation set.
Fig 5.
(A) Representative cases in the validation set. Abdominal enhanced computed tomography (CT) shows a very large tumor in the right lobe. Based on 3D volumetry using SYNAPSE VINCENT, the remnant volume after right lobectomy of the liver was 45.2%. (B) Representative cases in the validation set. Abdominal enhanced CT shows the tumor in the lateral segment (arrowhead). On 3D volumetry using SYNAPSE VINCENT, the volume of the lateral segment was 16.4%.