Archive for the ‘Instrumental Tests’ Category

A CT scan for early detection of lung cancer

Thursday, November 11th, 2010

Several studies have shown that the implementation of the TAC annual preventive reduce 20 percent of deaths from lung cancer in populations at risk, which for the director of the department of chest medicine at the University of Navarra Hospital and principal investigator of one of them, Dr. Javier Zulueta, should serve to reopen the debate about its effectiveness in the future.

CT scan

IELCAP international study, published recently and included the participation of the University Hospital of Navarra and the Center for Applied Medical Research (CIMA), University of Navarra, and the recent research conducted by the National Cancer Institute (NCI) and funded by the U.S. government, endorse the importance of this diagnostic test in the increased survival of patients with lung cancer. (more…)

Nuclear magnetic resonance (NMR)

Sunday, November 15th, 2009

It is a technique that uses the emission of electromagnetic waves created by a particular device, these waves through thin fabric were to be analyzed.

The received signals are generated by magnetic resonance of hydrogen nuclei especially abundant in all the constituent body, these signals are deciphered by a special transducer that builds three-dimensional image. (more…)

CT scan (Computerized Axial Tomography)

Thursday, November 12th, 2009

Is half-invasive for the amount of radiation and for the frequent use of contrast media.
The beam of x-rays used is flat and wide as a sheet perpendicular to the long axis of the body, the three-dimensional image to be reconstructed by a computer corresponds to a cross-section body top few millimeters.
If you hit this picture, you can get a two-dimensional figure which is reproduced on a film, so the body can be analyzed, layer by layer, to that portion of its axis that contains the body structures that are to be analyzed. (more…)


Wednesday, November 11th, 2009

The power of penetration and therefore the depth of these therapies depends on the wavelength;
Once you enter are converted into heat by acting locally, because the human body is not a good conductor of heat.

It follows that most of the radiation therapy is contraindicated when the depth of tissue to be irradiated, there are metal parts (prostheses, plates, screws, etc.). That being good conductors of heat, absorbing it, they get hot they can cause burns so deep.
The simplest is that radiation therapy that uses high-calorie artificial light rays through ovens where the party is asked to be treated.
Other forms of therapy are the ultraviolet rays with good capacity for disinfection and healing power. (more…)


Monday, November 9th, 2009

It is a survey technique that allows to obtain images in the district studied, using the reflection of a beam of ultrasound sent through tissues of different densities.
The acoustic signals produced by the passage of the ultrasound beam through tissues, are recorded by a probe in which case the conversion of the acoustic signal into an electrical signal and then in pictures, in this way makes it possible to precisely determine the location and size of organs and structures that are being considered, the presence of space-occupying formations and the nature of liquid or solid. (more…)

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