Laurent Milot1, Kayan Ma2, Erin Efford1, Gal Sela2, Carolyn Maloney1, Susan Crisp1, Natalie Coburn3, Masoom Haider1, Cameron Piron2, Calvin Law3, Don Plewes4
1Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; 2Sentinelle Medical Inc, Toronto, Ontario, Canada; 3Department of Surgical Oncology, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; 4Department of Imaging Research, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
Ultrasound and MRI provide complimentary information useful in pre-operative planning for surgical resection of hepatic metastases from colorectal cancer. This study investigates the value of real-time co-registration of preoperative MRI and ultrasound images to determine if this method improves the ability to localize suspicious targets under ultrasound, using MRI as a gold standard. Co-registered MRI/ultrasound imaging yielded a significant increase in the number of targets successfully localized compared to ultrasound examination alone. Co-registered imaging was particularly effective in localizing small lesions (less than 5 mm) which were difficult to identify under conventional ultrasound examination.