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.
Keywords