Why does sitting for long periods of time increase back pain sometimes? This question has been studied for the past 50 years and researchers still find controversy when trying to answer the question. At the heart of the dilemma is a mechanical dynamic between body weight, body posture, and spinal disc load.
A loading, compressive force on a spinal disc creates a certain amount of pressure within the disc which is like a marshmallow in between two graham crackers being squished together. This pressure can be measured with special devices inserted into the disc. With various body positions like lying down, sitting, standing and bending forward, the pressure amounts vary and were first reported in the landmark study performed by Dr. Nachemson in 1981 . In this study, he found that sitting produced higher pressures in the spinal disc than standing. So, for the past thirty years, clinicians have told patients with degenerative disc related back pain to avoid prolong sitting because h...
Definition A chest x-ray is an x-ray of the chest, lungs, heart, large arteries, ribs, and diaphragm. Alternative Names Chest radiography; Serial chest x-ray; X-ray - chest How the test is performed The test is performed in a hospital radiology department or in the health care provider's office by an x-ray technician. Two views are usually taken: one in which the x-rays pass through the chest from the back (posterior-anterior view), and one in which the x-rays pass through the chest from one side to the other ( lateral view). You stand in front of the machine and must hold your breath when the x-ray is taken. How to prepare for the test Inform the health care provider if you are pregnant. Chest x-rays are generally avoided during the first six months of pregnancy. You must wear a hospital gown and remove all jewelry. How the test will feel There is no discomfort. The film plate may feel cold. Why the test is performed Your doctor may order a chest x-ray if you have any of the following symptoms: A...
A chest tomogram is a picture of the chest area created by moving the x-ray machine in one direction while moving the recording film the other way. This method blurs structures in front of and behind the area of the chest being studied. This allows for a more detailed view of a specific level within the chest cavity.
Laminography; Planigraphy; Stratigraphy; Tomogram - chest
How the test is performed
The test is performed in a hospital radiology department by an x-ray technician. You will be asked to lie on your back on the x-ray table. You should not move during the test, as this will affect the image quality.
How to prepare for the test
Tell the health care provider if you are pregnant. You must wear a hospital gown and remove all jewelry.
How the test will feel
There is generally no discomfort associated with tomography.
Why the test is performed
A chest tomogram can show certain problems ...
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