20-45 minute
How an MRI scan is performed. A magnetic resonance imaging (MRI) scan is a painless procedure that lasts 15 to 90 minutes, depending on the size of the area being scanned and the number of images being taken.  Guide. Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to take pictures of the head. In many cases, MRI gives information that can't be seen on an X-ray, ultrasound, or computed tomography (CT) scan. Magnetic resonance imaging (MRI) of the head is done to: 1  Look for the cause of headaches. 2  Help diagnose a stroke or blood vessel problems in the head. 3  Problems with blood vessels may include an aneurysm or abnormal twisted blood vessels that are present at birth (this is called an arteriovenous [AV] malformation). PET (positron emission tomography) scan times take longer than either MRI or CT scans because the injection of a radioisotope take 45 to 1.5 hours to travel through the body. The typical scan (or image acquisition) time for brain and oncology related scans is 30 to 60 minutes. Consequently, a complete PET scan customarily takes 2 hours. Sometimes, an additional 20 minutes of imaging time is necessary for scans related to melanoma and sarcoma. Prior to the actual scan, patient registration and meeting with the technologist takes approximately 30 minutes. Here are typical timelines for your scan: MRI (magnetic resonance imaging) scan times will take 30 to 40 minutes for the majority of scans. That is, brain, knee, spine and shoulder. However, if the study requires a contrast agent your scan time can be 50-60 minutes The scan itself may take another 30 to 60 minutes. The heart and brain studies take less time for imaging. You will be asked to remain still for the entire length of the exam, since motion will reduce the quality of the images.  Magnetic Resonance Imaging (MRI) - Head. Magnetic resonance imaging (MRI) of the head uses a powerful magnetic field, radio waves and a computer to produce detailed pictures of the brain and other cranial structures that are clearer and more detailed than other imaging methods.  An MRI (magnetic resonance imaging) scan is an imaging test that uses powerful magnets and radio waves to create pictures of the body. It does not use radiation (x-rays). Single MRI images are called slices. The images can be stored on a computer or printed on film.  The length of the exam depends on the type of study being performed. 1  MRI of the Brain … 20-45 minute scan time. 2  MRI of the Orbits … 20-35 minute scan time. 3  MRI of the TMJ … 45-60 minute scan time. 4  MRI of the Soft Tissue Neck … 25-35 minute scan time. 5  MRI of the Cervical Spine … 20-35 minute scan time. 1 MRI of the Brain … 20-45 minute scan time. 2  MRI of the Orbits … 20-35 minute scan time. 3  MRI of the TMJ … 45-60 minute scan time. 4  MRI of the Soft Tissue Neck … 25-35 minute scan time.
http://www.nhs.uk/Conditions/MRI-scan/Pages/How-is-it-performed.aspx http://www.webmd.com/brain/magnetic-resonance-imaging-mri-of-the-head http://info.shields.com/bid/43435/MRI-CT-and-PET-Scan-Times http://my.clevelandclinic.org/services/imaging-institute/imaging-services/hic-pet-scan http://www.radiologyinfo.org/en/info.cfm?PG=headmr http://www.nytimes.com/health/guides/test/mri/overview.html http://www.advancedimagingofmt.com/index.php?page=mri-faq
length of time for brain mri