How do you do a CT Cisternography?

How do you do a CT Cisternography?


  1. pre-contrast CT is performed with thin slices.
  2. 3-10 mL of an iodinated non-ionic low-osmolar contrast agent is instilled into the thecal sac after lumbar puncture.

What is Mr Cisternography?

The MR cisternography technique is a new examination method with a higher sensitivity for the detection of CSF fistulae than CT cisternography. The CISS technique is superior compared with PSIF and should be used in patients with high-flow CSF fistulas.

How long does a cisternogram take?

The scan takes about 30-60 minutes. You will be scheduled for serial scans starting about 24 hours, 48 hours and possibly 72 hours after your initial scan. If you had pledgets placed, they will be removed at the 24-hour scan.

Is a cisternogram painful?

What will I feel, will it hurt? You may feel a slight stinging sensation when the doctor numbs the skin where the spinal needle will be placed. You will feel some pressure as the spinal needle is placed into the spinal canal.

How is CSF rhinorrhea treated?

Very small leaks may only require bed rest and medication to resolve. However, in most cases, to cure cerebrospinal fluid rhinorrhea, surgery will be necessary. The type of surgery required will depend on the cause of your condition (surgery or trauma).

Can MRI show CSF leak?

CT cisternography, though invasive, helps accurately identify the site of CSF leak, especially in the presence of multiple bony defects. Magnetic resonance imaging (MRI) accurately detects CSF leaks and associated complications such as the encephaloceles and meningoceles.

What is a CSF fistula?

Cerebrospinal fluid (CSF) fistula represents a rare neurosurgical entity that can be defined as a communication between the subarachnoid space and nasal fossa or less commonly the ear cavity. It can be spontaneous without an evident etiology or secondary following a skull base surgery or trauma.

Who performs a cisternogram?

A radiologist will interpret the images, write a report, and deliver the results to your doctor via the internal computer system. This process usually takes less than 24 hours.

What is the half life of indium 111?

2.8 days
Indium In 111 decays by electron capture with a physical half-life of 67.2 hours (2.8 days). The energies of the photons that are useful for detection and imaging studies are listed in Table 1.

What conditions can a lumbar puncture diagnose?

A lumbar puncture can help diagnose serious infections, such as meningitis; other disorders of the central nervous system, such as Guillain-Barre syndrome and multiple sclerosis; or cancers of the brain or spinal cord.

What is in-111 DTPA used for?

In-111 DTPA is indicated for use in radionuclide cisternography In-111 DTPA – Clinical Pharmacology

How does in-111 enter the basal cisterns?

After intrathecal administration, the In-111 DTPA is absorbed from the subarachnoid space and the remainder flows superiorly to the basal cisterns within 2 to 4 hours and subsequently will be apparent in the Sylvian cisterns, the interhemispheric cisterns, and over the cerebral convexities.

What is the effective dose for a radionuclide cisternography with SPECT/CT?

On the basis of these estimations, the combined effective dose for a radionuclide cisternography study with SPECT/CT can range between 3 and 16 mSv. Despite the risks associated with ionizing radiation, hybrid SPECT/CT has many valuable indications, particularly for the evaluation of CSF dynamics, with the benefit of anatomic localization.

What are the benefits of 111 in-DTPA?

When injected into the subarachnoid space, 111 In-DTPA can provide physiologic information on CSF dynamics, with minimal radiation dose to the patient and no direct adverse effects. A variety of CSF flow patterns can be demonstrated on radionuclide cisternography.