Automated CT Based Liver Volume Assessment - Definiens

Methods
• 30 consecutive CT scans from distinct patients with liver
metastases were obtained. Patients had tumor burdens form
minimal to heavily occupying much of the liver
– 320 slice Toshiba CT scanner
– Study details:
• 1mm collimation
• Portal venous phase contrast-enhanced scans of the abdomen
• All scans were manually segmented to define reference standard
for liver boundaries (including metastatic lesions) using in-
house software
– Parts of the inferior vena cava and portal vein were included within
the liver boundary when enclosed by liver parenchyma in order to
make the liver contour smooth
Medical Imaging – Princess Margaret Hospital – University Health Network – Mount Sinai Hospital – University of Toronto