CT
CT Scan Resources Normal Pathology
Gliomatosis cerebri
Gliomatosis cerebri (infiltrative diffuse astrocytosis) is a rare primary brain tumor. It is commonly characterized by diffuse infiltration of the brain with neoplastic glial cells that affect various areas of the cerebral lobes. Glimatosis Cerebi behaves like a malignant tumor that is very similar to Glioblastoma.
Number of View :488Categories: Head Tags: Gliomatosis cerebri
Arachnoid Granulations of Pacchioni
Arachnoid granulations of Pacchioni play a major role in the resorption of cerebrospinal fluid. They are most commonly found within the lacunae laterales of the superior sagittal sinus, producing calvarial impressions between 13 and 15 mm lateral to midline in the region.
Number of View :690Categories: Head Tags: Arachnoid, Granulations, Pacchioni
Stroke
A stroke, previously known medically as a cerebrovascular accident (CVA), is the rapidly developing loss of brain function(s) due to disturbance in the blood supply to the brain. This can be due to ischemia (lack of blood flow) caused by blockage (thrombosis, arterial embolism), or a hemorrhage (leakage of blood). As a result, the affected area of the brain is unable to function, leading to inability to move one or more limbs on one side of the body, inability to understand or formulate speech, or an inability to see one side of the visual field. Read more…
Number of View :920Cerebral venous sinus thrombosis
Cerebral venous sinus thrombosis (CVST) is a rare form of stroke that results from thrombosis (a blood clot) of the dural venous sinuses, which drain blood from the brain. Symptoms may include headache, abnormal vision, any of the symptoms of stroke such as weakness of the face and limbs on one side of the body, and seizures. The diagnosis is usually by computed tomography (CT/CAT scan) or magnetic resonance imaging (MRI) employing radiocontrast to demonstrate obstruction of the venous sinuses by thrombus.
Number of View :1064Categories: Head Tags: Cerebral, thrombosis, venous sinus
Glioma
A glioma is a type of tumor that starts in the brain or spine. It is called a glioma because it arises from glial cells. The most common site of gliomas is the brain.
Gliomas are classified by cell type, by grade, and by location.
Number of View :430Arachnoid cyst
Arachnoid cysts are cerebrospinal fluid covered by arachnoidal cells and collagen that may develop between the surface of the brain and the cranial base or on the arachnoid membrane, one of the three membranes that cover the brain and the spinal cord. Arachnoid cysts are a congenital disorder, and most cases begin during infancy; however, onset may be delayed until adolescence.
Number of View :606Meningioma
Meningiomas are the second most common primary tumor of the central nervous system, arising from the arachnoid “cap” cells of the arachnoid villi in the meninges. These tumors are usually benign in nature; however, they can be malignant.
Number of View :498Categories: Head Tags: Meningioma
Subdural hematoma
A subdural haematoma (subdural hematoma) or subdural hemorrhage (SDH) is a form of traumatic brain injury in which blood gathers within the inner meningeal layer of the dura matter (the outer protective covering of the brain). Usually resulting from tears in veins that cross the subdural space, subdural hemorrhages may cause an increase in intracranial pressure (ICP), which can cause compression of and damage to delicate brain tissue. Acute subdural hematoma (ASDH) has a high mortality rate and is a severe medical emergency.
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Hounsfield scale
The Hounsfield scale, named after Sir Godfrey Newbold Hounsfield, is a quantitative scale for describing radiodensity.
The Hounsfield unit (HU) scale is a linear transformation of the original linear attenuation coefficient measurement into one in which the radiodensity of distilled water at standard pressure and temperature (STP) is defined as zero Hounsfield units (HU), while the radiodensity of air at STP is defined as -1000 HU.
It is the definition for CT scanners that are calibrated with reference to water. Read more…
Categories: General Tags: Hounsfield scale, UH
Focal nodular hyperplasia (FNH)
Focal nodular hyperplasia (FNH) is a benign tumour of the liver (hepatic tumour), which is the second most prevalent tumour of the liver (the first is hepatic hemangioma). It is usually asymptomatic, rarely grows or bleeds, and has no malignant potential. This tumour is often resected because it is difficult to distinguish from hepatic adenoma. Read more…
Number of View :1053Categories: Abdomen Tags: FNH, Focal nodular hyperplasia
