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The Differences between Making a Conventional CT Scan and One of the Latest Generation

The new computed tomography devices are not only less harmful to patients, but also facilitate and speed up the diagnosis process notably.

The doctor advised me that he has to perform a CT scan and that he will do it with a new generation computerized tomography equipment. What advantages do you have compared to the conventional CT?

The main advantage is that images is lower dose of radiation to the patient and lowest cost CT scan in Delhi. Also, its higher resolution power makes it possible to identify lesions with greater clarity and, being more quickly, the problems caused by the involuntary movement of the patient are reduced.

This new technology also allows heart studies to be made in the time that a heartbeat lasts, as well as screening for lung cancer using low radiation dose protocols. Finally, in the cases of patients who may have implanted metallic materials, it contains contracts that reduce the distortion of the image produced by these implants.

Does it involve any risk to undergo this test?

Only the inherent risk derived from radiation, although it is lower than in conventional CT since it has a precise dose control system that ensures the minimum radiation needed in each scan and for each patient (calculated about their physical characteristics). Also, it is a highly safe test in pediatric patients.

Do I require to do any prior preparation? Is the test always performed with contrast?

Most studies do not require any preparation on the part of the patient. Specific scans need fasting or certain restrictions in the diet. Some cardio logical examinations must be preceded by medication to control the heart rhythm, always under medical supervision. Neither is it still necessary to administer contrast, although in many cases its administration provides more information for diagnosis.

The conventional CT scan may take several minutes, depending on the body region and the size of the patient. CT is the technique of choice to acquire two-dimensional complete axial images of the body without the disadvantages of bone or air overlay of conventional radiographs.

One of the advantages of the helical technique by CT scan centres is the possibility of detecting lesions smaller than the conventional thickness of a cut.

Both in the CT with the single crown detector and in the multi-detector CT, the data is acquired continuously while advancing the table through the Gantry. The X-ray tube describes an approximately helical path around the patient. If the progress of the table is coordinated with the time required for a 360º rotation, the data acquisition will be complete without interruption.

In conventional CT the x-ray tube receives the energy for a rotation, which usually lasts 1sg and the intervals of 6 - 10 sg, this allows the tube to cool between one sweep and the next. In the helical CT, the x-ray tube is subjected to a crucial thermal state, since it receives energy for about 30 sg without interruption. Therefore, the helical CT tube is characterized by its high thermal capacity, its high cooling rates, and its large size. All these technical conditions increase the noise of the system.

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