What does sagittal mean in MRI?

This type of magnetic resonance imaging (MRI) study looks at the brain with 24 sagittal (vertical – front to back) cuts beginning at right side of the brain and moving to the left. • Flair images allow the signal from cerebrospinal fluid (CSF) to be suppressed so existing lesions are easier to see.

What is T1WI and T2WI?

The two basic types of MRI images are T1-weighted and T2-weighted images, often referred to as T1 and T2 images. The timing of radiofrequency pulse sequences used to make T1 images results in images which highlight fat tissue within the body.

What is sagittal T2?

Conventionally, sagittal FSE T2 is the most commonly used sequence when imaging the spinal cord in MS. Our results suggest that the use of an additional sagittal sequence can significantly increase the detection of MS lesions in the cervical and thoracic cord without a substantial decrease in specificity.

What is difference between T1 and T2 MRI?

T1-weighted images are produced by using short TE and TR times. The contrast and brightness of the image are predominately determined by T1 properties of tissue. Conversely, T2-weighted images are produced by using longer TE and TR times.

What is meant by sagittal?

Definition of sagittal 1 : of or relating to the suture between the parietal bones of the skull. 2 : of, relating to, situated in, or being the median plane of the body or any plane parallel to it.

What is T2 and flair Hyperintensities?

Focal hyperintensities in the subcortical white matter demonstrated by T2-weighted or FLAIR images are a common incidental finding in patients undergoing brain MRI for indications other than stroke. They are indicative of chronic microvascular disease.

What are T2 lesions in the brain?

White matter hyperintensities (WMHs) are lesions in the brain that show up as areas of increased brightness when visualised by T2-weighted magnetic resonance imaging (MRI). WMH’s are also referred to as Leukoaraiosis and are often found in CT or MRI’s of older patients.

What does sagittal T1WI mean?

A, Sagittal T1WI demonstrates a well-circumscribed hyperintense lesion within the L2 vertebral body consistent with a hemangioma. B, Sagittal T2WI demonstrates high signal within this lesion confirming the diagnosis of hemangioma. C, Sagittal STIR image.

What is high signal on the sagittal stir?

Bone marrow has high signal on this sequence, which may obscure some vertebral body lesions. C, Sagittal STIR (short tau inversion recovery). This is a T2-weighted fat saturated sequence.

What is t1wii lumbar spine?

A, T1WI of the lumbar spine demonstrates compression fracture of the L4 vertebral body with greater than 50% loss of vertebral body height. The heterogeneous low signal within the vertebral body could be a result of edema rather than metastatic infiltration.

What is axial T2WI on stir?

D, Axial T2WI at the T12 level demonstrates the hyperintense well-circumscribed hemangioma within the left side of the vertebral body. Fig. 9-4 Typical benign hemangiomas may sometimes have high signal on STIR images. A, Sagittal T1WI demonstrates a well-circumscribed hyperintense lesion within the L2 vertebral body consistent with a hemangioma.