The volume analyzer Synapse Vincent image analysis system (Fujifilm Medical, Tokyo, Japan) automatically calculated the approximate total liver volume (TLV) on the preoperative computed tomography (CT) scans. Remnant liver volume (RLV) was measured using the MDCT at 7 days, and 1, 2, 5, and 12 months postoperatively. RLV immediately after surgery was calculated as (TLV + tumor volume) – resected liver volume, while the regeneration rate was calculated as (RLV at 7 days, and 1, 2, 5, and 12 months/TLV) × 100. The approximate visceral fat area (VFA) at the umbilical level on preoperative CT scans was also automatically calculated using the Synapse Vincent image analysis system.
Synapse vincent image analysis system
Manufactured by Fujifilm
Sourced in Japan
The SYNAPSE VINCENT image analysis system is a laboratory equipment designed for advanced image processing and analysis. It offers core functionalities for the acquisition, visualization, and quantification of digital images. The system provides users with tools to efficiently manage, process, and extract meaningful data from various types of images.
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Lab products found in correlation
3 protocols using synapse vincent image analysis system
1
Liver Volume and Regeneration Assessment
2
Automated Liver Volume Assessment
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The Volume analyzer SYNAPSE VINCENT image analysis system (Fujifilm Medical, Tokyo, Japan) automatically calculated an approximate total liver volume (TLV) on preoperative computed tomography (CT) scans. Remnant liver volume (RLV) was measured using multidetector CT on postoperative day 7 and at 1, 2, 5, 12, and 24 months postoperatively. We calculated the RLV at day 0 after surgery as follows: (TLV + tumor volume) – resected liver volume, and the regeneration rate as follows: (RLV at day 7 and at 1, 2, 5, 12, and 24 months / TLV) × 100.
3
Quantifying Body Composition from CT
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CT images comprised 1 mm slice thickness throughout the entire lung. The chest CT images analyzed the visceral fat, subcutaneous fat, chest circumference, abdominal circumference, hepatic attenuation value, and splenic attenuation values. Hepatic and splenic attenuation values were measured using area region of interest (ROI) greater than 100 mm2. Hepatic attenuation values were calculated by placing 2 ROIs greater than 100 mm2 in the liver while excluding regions of nonuniform parenchymal attenuation, including hepatic vessels. Splenic attenuation was obtained by placing 1 ROI greater than 100mm2 in the spleen. The liver-to-spleen ratio (L/S) was calculated by taking the average Hounsfield unit (HU) measurement of both hepatic ROIs and dividing it by the spleen HU value [7] (link). Additionally, we measured the visceral fat, subcutaneous fat, and abdominal circumference in CT cross-sections under the diaphragm and the subcutaneous fat and chest circumference at the fourth thoracic vertebra using the SYNAPSE VINCENT image analysis system (Fujifilm Inc., Tokyo, Japan). We set the lower and upper thresholds of visceral and subcutaneous fat analysis to −200 HU and −50 HU, respectively.
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