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Central nervous system

//Central nervous system

Diamox (Acetazolamide) Brain Stress Perfusion

By |2018-05-17T12:07:17+03:00May 26th, 2014|Central nervous system, Nuclear Medicine|

Diamox (Acetazolamide) Brain Stress Perfusion is a functional nuclear imaging technique performed to evaluate regional cerebral perfusion. Brain SPECT can be complemented with pharmaceutical agents that enhance regional cerebral blood flow, such as acetazolamide (carbonic anhydrase). Acetazolamide increases local pCO2 and causes arteriolar dilation, allowing for assessment of cerebrovascular reserve in transient ischemic [...]

Brain Tumour and Tumour Viability SPECT

By |2018-05-17T12:01:06+03:00May 26th, 2014|Central nervous system, Nuclear Medicine|

Tc99m-tetrofosmin/MIBI and thallium-201 perfusion agents concentrate mainly in viable tumour cells, less so in inflammatory cells and almost negligibly in necrotic tissue. Although early images may demonstrate uptake in infection because of passive diffusion, this usually clears on delayed 2-4 hr images. Thallium, Tetrofosmin and MIBI do not cross the BBB unless the [...]

Brain Perfusion SPECT

By |2018-05-17T11:54:06+03:00May 26th, 2014|Central nervous system, Nuclear Medicine|

Brain perfusion single-photon emission computed tomography (SPECT) imaging is a functional nuclear imaging technique performed to evaluate regional cerebral perfusion.Because cerebral blood flow is closely linked to neuronal activity, the activity distribution is presumed to reflect neuronal activity levels in different areas of the brain. A lipophilic, PH-neutral radiopharmaceutical (most commonly99m Tc-hexamethylpropyleneamine oxime [...]

Seizure (ICTAL, Post ICTAL and INTERICTAL) Brain Perfusion SPECT

By |2018-05-20T10:43:37+03:00May 26th, 2014|Central nervous system, Nuclear Medicine|

Seizure (ICTAL, Post ICTAL and INTERICTAL) Brain Perfusion SPECT is used primarily if an MRI and EEG didn't pinpoint the location of where the seizures are originating. There are two ways of doing the SPECT, during a seizure (ictal) and between seizures (interictal). The ICTAL SPECT provides the opportunity to image cerebral [...]

Brain Death Scintigraphy

By |2018-05-17T11:46:47+03:00May 26th, 2014|Central nervous system, Nuclear Medicine|

This study is performed to confirm a clinical diagnosis of brain death. Brain-specific or lipophilic tracers which cross the blood-brain barrier (eg, Tc-99m HMPAO or Tc-99m ECD) are preferred over non-specific or lipophobic tracers (eg,Tc-99m DTPA), which are considered angiographic radionuclides.source: newcastlenuclearmedicine.com.au English: Brain Death Study Instructions Arabic: Brain [...]