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Scanner Rheumatology : Definition, Prepare, Indications, Complications, and Result

Thursday, December 27th 2012. | Radiography

Scanner Rheumatology Definition

The scanner is a medical imaging technique that provides cross-sectional images of the body.

The scanner is a medical imaging technique that provides cross-sectional images of the body. It combines X-rays (such as x-rays) to computer media which allows to reconstruct images in different dimensions: one can thus obtain longitudinal sectional views or horizontal.

The scanner is a radiological technique which uses as conventional radiography, a tube which emits x-rays, and sensors which are arranged in a ring. These measure the difference in intensity between the input and the output of an X-ray beam in a region of the body. The X ray tube and the sensors rotate around the body during the examination.Measuring the attenuation of the X-ray beam is performed at different rotation angles. These data are then transmitted to a computer which reconstructs images by assigning shades of black, white and gray depending on the nature of distinct organs through which the X-ray

The bone images are much more accurate with a CT scan with a simple radiological examination. This technique can also enable to study such things as the intervertebral discs of the spine bone, which are not visible in radiographs. The scanner also allows to reconstruct three-dimensional bone studied, which frees up angles on which any small fractures can be visualized.

Scanner Rheumatology

A scanner apparatus?

In radiology departments or among radiologists, scanner devices are installed in rooms with thick walls that prevent the passage of radiation. The scanner looks like a ring of about 2 m in diameter in which slides the examination bed on which the patient takes place.

It is in this ring are the X-ray tube and sensors.

The radiologist (or radiology technician) is generally placed behind a glass that does not pass the X-ray examination and follows in front of screens or computers that process data and visualize images. 

Data from the scanner are then reproduced on a radiographic film or paper.

They can also be transcribed onto a DVD or CD-ROM. Radiologists can also transmit images via Intranet or Internet inside or outside their workplace. All data are stored in a retrieval system that allows powerful compare images of the same patient after the other.

How to prepare?

The scanner is a rheumatologic or spinal examination that does not require injection of contrast.

The examination is prescribed by a physician and performed in a radiology practice or institutional care (hospitals and clinics).

Make sure you bring the prescription order review, your Social Security card and another.

 Injection of contrast material, a special order will be determined by the radiologist at the time of making an appointment and you will get these products in pharmacy before the completion of the examination.

Which indications?

A bone scan may be prescribed in cases of suspected fracture (pelvis, femur, vertebra, avulsion fracture of the ankle) and before the completion of surgery to help the surgeon to identify at the time of intervention.

A CT scan of the spine is indicated in cases of neck pain, back pain or lumbago rebel treatment to detect possible disc herniation which may require treatment neuro-surgery. This is also the case of sciatica and neuralgia cervicobrachial.

Hip pain, knee or shoulder can also be explored by scanner to analyze possible cartilage damage.

What are the Complications?

The irradiation delivered by the scanner unit must be taken into account when frequent examinations are prescribed.

A CT scan of the spine issue, in fact, much radiation as 400 chest x-rays and four years of natural radiation.

What results?

The CT images are available immediately after the examination, but they must always be analyzed by a radiologist.

It is possible that this analysis takes several hours.

The results are given in the form of a report to be transmitted to the prescriber to review images reproduced on film or on paper plates, and a CD-ROM which can be viewed on a computer with specific programs for reading scanner.

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