Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
All_answers.docx
Скачиваний:
1
Добавлен:
01.07.2025
Размер:
79.67 Кб
Скачать

73) Introscopy, its kinds.

Introscopy - (intro - inside) not destroying research of internal structure of object and processes proceeding in it by means of sound waves, electromagnetic radiation of various ranges, a constant and variable electromagnetic field and streams of elementary particles.

It is possible to allocate three basic kinds of introscopy methods:

Projective - reception of the shadow image of object;

Tomographic - reception tomographic images of object;

Echosounding, including Doppler’s echosounding.

  1. Projective methods. In projective methods sounding (irradiation) of object from some foreshortening and receive its shadow image (projection) is spent. X-ray radiation (rontgenography) is used as probing radiation more often.

  2. Tomography methods. A method of radiological research by means of which it is possible to make a picture of the layer lying on certain depth of investigated object. Reception of a level-by-level picture is based on moving of two of three components (an x-ray tube, an x-ray film, object of research).

  3. Echosounding. Some methods of echosounding (for example, usual, wrongly carry to a tomography that terminologically not truly. In ultrasonic research also receive the image of some section, but the method of its reception is not tomographic: there is no a shooting with many foreshortenings in crossed directions and, the most important, there is no decision of return tomographic problems.

74) Computer tomograph.

Computer tomograph (CT) is a combination of x-ray installation and a computer. X-ray installation does pictures of the patient under different corners, (cuts) which are processed and summarized by a computer - the image allowing doctors "to glance" inside of a body of the patient turns out.

-The computer tomography of a brain and skull allows the doctor to see tumors, sites of an insult, a hematoma, pathology of blood vessels and crises.

-The computer tomography of a neck is applied to detection of tumors and research of the reasons of increase cervical lymph nodes.

-The computer tomography of a thorax is appointed for specification of changes of the lungs revealed at photoroentgenography or rontgenography.

-The computer tomography of a belly cavity and a basin is often applied at a trauma of a stomach, to exact diagnostics of the suspected pathology before operation.

-The computer tomography of a backbone helps to reveal hernias of a disk, narrowing of the channel of a spinal cord.

75) Magnetic-resonant tomography.

Magnetic-resonant tomography (MRT) - tomography method of research of internal bodies of the person with use of the physical phenomenon of a nuclear-magnetic resonance - the method is based on measurement of the electro-magnetic response of atoms of hydrogen on excitation by certain combination of electro-magnetic waves in a constant magnetic field of a high tension. The principle of work of a magnetic-resonant tomograph is based on nuclear-magnetic a resonance of atoms of substance in a strong magnetic field.

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]