Fisher CT grading scale is used to grade severity of intracranial subarachnoid hemorrhage associated with rupture of an intracranial aneurysm. This scale predicts the risk of subsequent arterial spasms.

Apart from giving the dimensions of an intracranial aneurysm, its size should be cathegorized according to this table.

The diameter of the neck of the aneurysm is cathegorized as well.

Grading of intracranial hemorrhage in neonates is based on ultrasound imaging. It has four grades with increasing mortality and decreasing outcome.

Neer classification divides lesions of the rotator cuff into three stages that typically succeed in this order during one's life.

The classification of fractures of axis was introduced by Effendi et al. and later modified by Lewine and Edwards. With further two types added (IA and IIA), the modified classification has five types.

Lesions of the menisci on MRI are divided into four grades. Normal meniscus has uniformly low signal intensity on T2-weighted images (T2W). Grade I and II lesions can be a normal appearance of ageing in older patients.

Injuries to the medial collateral injury are divided into three grades similarly to other ligamentous lesions elsewhere.

Calculating doubling time of focal lesions or massess can give a hint, whether it has a malignant or rather benign growth dynamics. Doubling time of malignant lesions is between 30 and 500 days with a median of 100 days.

The Pfirrmann classification was developed in 2001 and was based on previous systems. It was validated on 60 MRI examinations of the lumbar spine assessed by three independent observers. The imaging protocol included sagittal T1 weighted spin-echo, T2 weighted fast spin echo (FSE) in sagittal and axial plane.

In 2007, Watanabe et al. published grading of degenerative changes of the intervertebral disc by MRI. It is based on T2 weighted axial sections.