Scientists and doctors are not always sure about the exact diagnostic meaning of hyperintense lesions.

Lymphangioma It is classified according to the size of the lymphatic channels as simple-capillary (small lymphatic vessels), cavernous (dilated lymphatic channels), or cystic (cystic spaces with lymphatic fluid, also known as cystic hygroma). MRI interpretation T1 v T2 images. Absence of T2 hyperintensity on STIR also rules out disc edema, and can be passed off as benign finding.

I might be wrong! Fat saturation is routinely used for postcontrast imaging in the orbits, suppressing the signal intensity from retrobulbar fat that might otherwise … Key points. Hypointense signal intensity in T1-weighted and hyperintense signal intensity in T2-weighted images confirm water content. If the mass has areas of hyperintense T1 signal, the next step is to evaluate suppression on fat-suppressed T1-weighted images. The radiologist or technician can view hyperintense lesions on T2 MRI images in real time from the observation room.

On the T2-weighted axial image, this large retinoblastoma demonstrates characteristic low signal intensity. Answered by Dr. Sudhir Kumar (2 hours later) … Enhancement is present on the postcontrast image. Based on the type and relative proportion of signal alterations on conventional T1-weighted (TIW) and T2-weighted (T2W) MR images, various etiologies of bone marrow lesions can be divided into three categories [Table 1].

On T1 images FAT is white; On T2 images both FAT and WATER are white; It’s all about FAT and WATER.

So, basically, the machine makes a signal, the tissues respond, the device records the response of the tissues to the signal.

Contrast MRI study: A 1.5mm T2 hyperintense lesion at the junction of anterior and posterior gland which may represent microadenoma.

Typically, neoplastic processes have lower T1-weighted signal and have hyperintense STIR and fat-suppressed T2-weighted signal relative to the adjacent disk and paravertebral muscles .

The timing of radiofrequency pulse sequences used to make T1 images results in images which highlight fat tissue within the body.

Pathologic processes show avid enhancement, but this may be difficult to appreciate when it is a diffuse process. At least I think this is how it was explained to me! Posted by Dr Balaji Anvekar at 11:03 …

Common Causes. The two basic types of MRI images are T1-weighted and T2-weighted images, often referred to as T1 and T2 images.

STIR can be used for confirmation where T1 high signal of fat gets suppressed.

Although not shown, it also was slightly hyperintense on the T1-weighted image. C5-6 intervertebral disc show unsual high signal on sagittal T1 and T2w images implies to Fat replacement in the disc space, a rare sign of degenerative disc disease. A tiny T1 hypointense and T2 hyperintense lesion seen at the junction of anterior and posterior gland measuring around 1.5 mm in size.There appears to be enhancement f lesion on the delayed images.