Day22 X-ray and CT

Radiography and Radiology

1. radiography
   • to produce an image of the internal organs, exposing the body to a small dose of radiation
2. radiology
   • the use of radiation in the diagnosis and treatment of disease such as cancer

X-ray examination (the chest X-ray)

【Procedure of serial chest X-rays】(serial(adj)連続的な, series(n)連続)

A chest X-ray may be repeated at intervals to track for any changes.

1. The patients stands, facing the photographic plate
   • with the chest pressed to the plate
   • with hands on hips and elbows pushed out in front
2. The radiographer, the technician who takes the X-ray
   • ask patients not to move
   • ask patients to breathe in deeply and not to breathe out
     • it’s easier to see abnormalities in inflated lungs than in deflated lungs
3. For a side, patients is asked to stand sideways to photographic plate
   • with arms raised

Dr

Now, take a deep breath and hold your breath.

Keep still.

【Densities of X-ray】

Dark

1. Andrew – Air
2. Felt – Fat
3. Sorry For – Soft tissue, Fluid
4. Causing – Calcium
5. Mammography – Metals

White

Computed Tomography (=CT scan)

CT scan can take up to 16 simultaneous cross-sectional images (slices)

• CT scan is used for
  • diagnosis of muscle and bone
  • locating tumors, infections and clots
  • monitoring the progress of malignant disease and the response to therapy
  • providing accurate guidance for interventional procedures such as biopsies and drainage

Today’s new words