Accurate segmentation and area estimation of neural foramina from both CT and MR images are essential to clinical diagnosis of neural foramina stenosis. Existing clinical routine, relying on physician's purely manual segmentation, becomes very tedious, laborious, and inefficient. Automated segmentation is highly desirable but faces big challenges from diverse boundary, local weak/no boundary, a...

We report two autopsy cases that revealed the partial absence of the septum pellucidum with ventriculomegaly. In each case, the brain showed mild dilatation of both frontal horns of the lateral ventricles, normal third and fourth ventricles and no aqueductal stenosis. The posterior portion of the septum pellucidum was absent and the fornices were fused in a single midline nodule, abnormally dis...

STUDY DESIGN Retrospective radiographic study. OBJECTIVE The optimal radiographic modality for assessing cervical foraminal stenosis is unclear. Determination on conventional axial cuts is made difficult due in part to the complex, oblique orientation of the cervical neuroforamen. The utility of 3-dimensonal (3D) computed tomography (CT) reconstruction in improving neuroforaminal assessment i...

Spinal stenosis is caused by narrowing of the spinal canal or neural foramina producing root ischaemia and neurogenic claudication [1] . Stenosis of the spinal canal is most often caused by a combination of loss of disc space, osteophytes and a hypertrophic ligamentum flavum. Not all patients with narrowing develop symptoms. However, the narrowing may progress to cause compression of the spinal...

BACKGROUND Previous studies in humans have reported that the dimensions of the intervertebral foramina change significantly with movement of the spine. Cervical spondylomyelopathy (CSM) in dogs is characterized by dynamic and static compressions of the neural components, leading to variable degrees of neurologic deficits and neck pain. Studies suggest that intervertebral foraminal stenosis has ...

The radiologic appearance of a "ballooned" fourth ventricle usually occurs consequent to obstruction of its exit foramina. One variant of ballooned fourth ventricle is the "isolated" ventricle, which occurs when there is both an aqueductal stenosis as well as extraventricular obstructive hydrocephalus. We describe the neuroradiologic evaluation of a patient originally thought to have an isolate...

Among the etiological causes of lumbar pain, osteoma is a rare benign bone tumor spine. The slowly growing arising from normal formation in periosteum. Osteomas are usually seen skull and long bones, but literature, cases osteomas affecting vertebra corpus, pedicle posterior element encountered. In this case, 28-year-old man presented with an originating left L5-S1 lateral recess causing lumbo-...

A 42-year-old man presented with chronic, continuous, bifrontal pressure headaches, slightly worse in the morning, forgetfulness, and confusion. There was no history of prior CNS hemorrhage or infection. The neurologic examination was unremarkable. No papilledema was present. Neuroimaging demonstrated symmetric enlargement of the lateral ventricles, a slit-like third ventricle, and downwards tr...

In their article in this issue of AJNR, Nowicki and coauthors (1) take as their point of departure the embarrassing fact that we are quite poor at relating the sensory and motor symptoms of spinal stenosis to the radiologic picture of the spinal canal and its foramina. They quote figures of 30% false negatives (ie, pain with no obvious disease), and 20% false positives (ie, asymptomatic disease...