When describing most
A hyperintensity or T2 hyperintensity is an area of high intensity on types of magnetic resonance imaging (MRI) scans of the brain of a human or of another mammal that reflect lesions produced largely by demyelination and axonal loss.
The tumor region is displayed with golden yellow color and the necrotic region is shown as white color. The grayscale MRI FLAIR, T2, T1c images are converted to RGB color model using the pseudo coloring process. Each of these is an 8-bit image that could contain gray shades varying from 0 to 255.
On a T1-weighted scans show tissues with high fat content (such as white matter) appear bright and compartments filled with water (CSF) appears dark. This is good for demonstrating anatomy.
Increased signal intensity (ISI) on T2-weighted magnetic resonance imaging (MRI) often indicates severe compression in patients with cervical myelopathy (CM).
White matter lesions (WMLs) are areas of abnormal myelination in the brain. These lesions are best visualized as hyperintensities on T2 weighted and FLAIR (Fluid-attenuated inversion recovery) sequences of magnetic resonance imaging. They are considered a marker of small vessel disease.
The dominant signal intensities of different tissues are: fluid (e.g. joint fluid, CSF): high signal intensity (white) muscle: intermediate signal intensity (grey) fat: high signal intensity (white) hyaline cartilage: intermediate signal intensity (grey)
Orange represents kidney cancer and leukemia. Green stands for liver cancer, lymphoma, and gall bladder cancer. Variations of purple signify pancreatic cancer, testicular cancer, leiomyosarcoma, Hodgkin lymphoma, stomach cancer, and esophageal cancer.
The majority of our scans are done in gray scale however some of our specialty exams offer color imaging as a way to aid the Radiologist using special computers.
The MR signal is a small electrical current induced in the receiver coil by the precession of the net magnetization (M) during resonance. This is a manifestation of Faraday's Law of Induction, wherein a changing magnetic field induces a voltage in a nearby conductor.
Abnormal low signal on T1 images frequently indicates a pathological process such as trauma, infection, or cancer.
Regions in red and yellow have high myelin content.
Changes to white matter will show up super-bright white (your doctor may call this "hyperintense") on an MRI scan.
T2-weighted images/sequences
Tumors, swelling, bruising, and infections are usually bright and stand out. Common colors of body parts: Cerebrospinal fluid, cysts, swelling/edema, bone bruises, fat: white. Organs, muscle: gray.
But inside our bodies, most of the surfaces and tissues appear pink. And the same is often true of cancer. If only a tumour were a vivid green, our challenge would be an easy one. Unfortunately, this is not the case – tumours can sometimes appear 'invisible' on camera as they blend in to their healthy surroundings.
They vary in size, shape, and color, like shades of pink, tan, brown, or black. Check with your doctor if a mole has changed in color and size or has spread. This may indicate skin cancer and require removal. Osteochondromas are the most common noncancerous bone tumors in children and young adults.
In most cases, doctors need to do a biopsy to be certain that you have cancer. A biopsy is a procedure in which the doctor removes a sample of abnormal tissue. A pathologist looks at the tissue under a microscope and runs other tests on the cells in the sample.
Foci of high signal in the cerebral white matter are common incidental findings on MR images of the brain of control subjects or patients with a variety of diseases.
White matter lesions, quantified as 'white matter signal abnormalities' (WMSA) on neuroimaging, are common incidental findings on brain images of older adults. This tissue damage is linked to cerebrovascular dysfunction and is associated with cognitive decline.
T2 MRI sequences are used to highlight areas of demyelination, which happens when the outer layer of the neurons is damaged due to MS activity. T2 sequences can be used to count the total number of MS lesions, which look like bright white spots on T2 sequences, and can be called “hyperintense”.
The Health Insurance Portability and Accountability Act (HIPAA) guarantees you access to your medical imaging exams. Your image files are typically stored at the facility where you had your exam. When you request your medical images, you will need to sign a release form.
“Plenty of patients ask, but techs should not give information and should not even react to what they're seeing on the image,” Edwards said. “They aren't doctors, and while they do know how to get around your anatomy, they aren't qualified to diagnose you.”