Login
Forgot your password?

Approvals/Requirements Satisfied by eRADIMAGING Courses
~ ASRT approval for ARRT® Category A credit   ~ MDCB approval by the Medical Dosimetrist Certification (Selected Courses)
~ ARMRIT accepted (All MRI Courses) ~ CAMRT and Sonography Canada recognize the ASRT approval (All Courses)
~ ARDMS accepted (All Courses) ~ Florida approval for all courses 1 credit or more
~ NMTCB accepted (All Courses) ~ California CE requirements met for all radiography courses
~ All Courses eligible of international radiographers' CPD requirements ~ All Courses available for RRAs
~ ASRT and MDCB are approved continuing education providers of ARRT® and all courses are accepted by ARRT®

Functional Magnetic Resonance Imaging in Brain Tumor Surgery

Mark P. Bowes, PhD*

*Medical Writer, Portland, Oregon

Address correspondence to: Mark P. Bowes, PO Box 82043, Portland, OR 97282. Email: mpbowes@gmail.com

Disclosure statement: Dr Bowes reports having no financial or advisory relationships with corporate organizations related to this activity.

 

ABSTRACT

More than 26,000 people are diagnosed with primary cancers of the brain and nervous system each year in the United States, and many more develop metastatic brain cancers resulting from primary tumors in other parts of the body. Neurosurgery can help to achieve several goals in patients with brain tumors, including decreasing tumor mass, relieving seizures and other symptoms, and prolonging overall survival. However, brain surgery is also associated with the risk of damaging regions of the cerebral cortex that are important for language, sensory and motor function, or other tasks. Functional magnetic resonance imaging (fMRI) allows surgeons to visualize critical regions of the cerebral cortex to aid in surgical planning and to assess the potential risk of permanent brain injury associated with surgical intervention. This approach uses the blood oxygen level-dependent (BOLD) effect, which is based on differences in magnetic resonance signal properties between oxygenated and deoxygenated hemoglobin in the brain. Patients are asked to complete a number of sensory, motor, or language-related tasks, which result in activation of corresponding brain regions and a corresponding increase in cerebral blood flow. fMRI detects the increased presence of oxygenated hemoglobin associated with these hemodynamic changes. fMRI is able to identify brain regions that are important for language or other cognitive tasks with a high level of precision, even when the anatomy of the brain has been altered due to tumor growth or prior surgery. Patient preparation is essential to ensure success of the fMRI session, including screening to identify appropriate patients, ensuring patients understand task requirements, and minimizing or correcting for head motion. It is also essential to understand potential limitations for fMRI, including artifacts associated with prior surgery, the presence of metal or medical devices, and effects of image processing.     

 

Full Course Content available to active members of eRADIMAGING.com



Sample eRADIMAGING Course *

* This sample course is for reference purposes only. It is not currently available for earning CE credits. To earn ARRT CE credits please subscribe to eRADIMAGING where you will see a complete listing of all active and eligible CE courses.


Follow us on social media

Advertising