Radiography is an imaging technique to visualise the internal form of any object using x-rays which are electromagnetic radiation.

This technique is used to treat patient by  diagnosing any disease using x ray beams to visualise the internal structure of the body to detect the presence of any disease or anomaly in the body.

Radiography is done by passing an x-ray beam through the body and x ray beams are generated by x ray generator.Certain amount of x rays are absorbed depending on the density of the object and the remaining transmitted to a detector so that an image may be recorded for later evaluation.The recording of the pattern may occur on films.


Radiography was discovered by the German physics professor Wilhelm conrad Rontgen on 8 November,1895.

Rontgen referred the radiation as “x”which indicate that is an unknown type of radiation.He received the first Nobel prize for his discovery.

Rontagen made a photographic plate of his wife’s hand using x rays and that was the first ever photograph of a human body part using x rays.

The first use of x rays under clinical conditions was done by John Hall Edwards on 11 january 1896.

Medical Uses

The body is made up of various substances with different densities,x rays can be used to reveal the internal structure of the body on film.

Doctors generally prescribe to do x ray for :

  • To examine an area where you have pain or discomfort
  • To monitor the progression of any disease
  • Also prescribe for Bone cancer,Brest Tours,Fractures,injuries,Digestive problems,Blocked blood vessels.Osteoporosis,Heart problems,Arthritis.

Radiation Dose

Radiation is not like a medicine dose.

Radiation dose has many forms:

1.Absorbed Dose:This is the concentration of energy deposited in tissue means energy absorbed by human tissue.

The unit of measurement for an x ray is milligray(mGy).

2.Equivalent Dose:This is the impact of radiation on tissue.

The unit of Equivalent dose is millisievert(msv).

3.Effective Dose:This is a calculated in mSv and calculated by considering three factors:

The absorbed dose by all organs of the body

The relative harm level of the radiation

The impact on each organ by radiation

In general,Effective dose helps by giving information about the long term risk of radiation to the patient.

Risks associated with radiation:

There is only a small amount of radiation is exposed to a patient and it is safe for

majority of adults.However there are certain risks associated with radiation such as:

  • Radiation is not good for foetus if the lady is pregnant.At that time,she should inform doctors before going for radiation test.
  • Radiation may also develop radiation induced cancer or cataract some time later in life.
  • If x ray is done to diagnose a fracture or some painful injuries in the body then patient may experience pain or discomfort.So always patients are prescribed to take painkillers before procedure.
  • Also the patient has ingested a contrast agent before an x ray then the patient will experience nausea,vomiting,itching,metallic taste in the mouth.


Benefits of Radiation

Believe it or not but radiation has many advantages in medical field such as :

  • To determine when surgeries are necessary
  • Reducing the need for exploratory surgeries
  • Improving cancer diagnosis and treatment
  • Reducing the length of Hospitalisation
  • Guide the appropriate treatment for common conditions such as injury,cardiac disease and stroke.


How patient is prepared before radiation?

Before undergoing radiation therapy.your healthcare team guide you through a planning process to ensure that radiation reaches to the precise spot where it is needed.

  • First your healthcare team finds a comfortable position for you during treatment.To do this,you will lie on a small table where procedure will be carried out.
  • Then your team mark on your body by using temporary markers or small tatoos where radiation will be received.
  • Then your radiation therapy will have you undergo computerised tomography to determine the area of body to be treated.
  • After planning process,the healthcare team decides what tye of radiation and dose will be given depending on your health and goals of your treatment.


Thus there are some risks and benefits regarding Radiography but has it contributed a great in Medical field.



Leave a Reply

Your email address will not be published.