Diathermy, Measurement of Radiation, Dose and its Calculations MCQ

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• With what energy must the radiation be given to image a bone of thickness 5 cm which has covering of skin of thickness of 2 cm on the both sides and the emerging intensity of the X – Ray is 200MeV. (impedance for bone = b for skin = s )
  ক

  2000e9

  খ

  200e(4s + 5[

  গ

  20/e

  ঘ

  2e
• If the half life is found to be 100 msec, what is the decay constant?
  ক

  693 per second

  খ

  24948 per hour

  গ

  0.1155 per minute

  ঘ

  59875.2 per day
• In a hypothetical radioactive material, the total number of active photons are 20000 and the decay constant is found out to be 4.916 X 10-17 per second. How much of the material will be left in a 100 years? (1 year = 365 days. Leap year is not assumed in the calculations)
  ক

  1589.99999

  খ

  19,999.9999

  গ

  19.999999

  ঘ

  123.99999
• The two known units of radioactivity and the relation between the two are _______
  ক

  Curie and Becquerel 1 Ci = 3.7 x 1010 Bq

  খ

  Curie and Becquerel 1 Bq = 3.7 x 1010 Ci

  গ

  Curie and Roentgens 1 Ci = 1000 R

  ঘ

  Roentgen and Becquerel 1 R = 1000 Bq
• What is the relation between 1 Rad, 1 Rem and 1 R?
  ক

  1 Rad ≈ 1.5 Rem ≈ 1000 R

  খ

  1 Rad ≈ 10 Rem ≈ 1.8 R

  গ

  1 Rad ≈ 1 Rem ≈ 1 R

  ঘ

  1 Rad ≈ 10 Rem ≈ 100 R
• Beyond what dose is the cerebral system shows signs of failure?
  ক

  25 – 200 rad

  খ

  200 – 600 rad

  গ

  600 – 1000 rad

  ঘ

  > 1000 rad
• Which of the following is used to measure the biological damage caused by radiation?
  ক

  Curie

  খ

  Rem

  গ

  Rad

  ঘ

  Roentgens
• In heat wave diathermy, the maximum power given out is 500 W and the maximum voltage possible is 4000V. Thus, what is the highest resistance that heat wave diathermy machine can deal with?
  ক

  3.2 K ohm

  খ

  32 K ohm

  গ

  320 K ohm

  ঘ

  3200 K ohm
• What precaution is used in diathermy?
  ক

  the patient is made to lie on a soft pillow

  খ

  pads are used for grounding and completing the circuit

  গ

  the patient is made to drink a large number of fluids

  ঘ

  wooden blocks are used for grounding
• What is the frequency range of the sound used for ultrasound diathermy?
  ক

  0.1 – 0.7 MHz

  খ

  0.7 – 3.3 MHz

  গ

  3.3 – 5 MHz

  ঘ

  5 – 15 MHz
• Which of the diathermy machine is good for deep tissue healing?
  ক

  short wave

  খ

  ultrasound

  গ

  cold compress

  ঘ

  electrical impulse
• The types of therapeutic diathermy machines that exist are ___________
  ক

  Short wave, micro wave and ultrasound

  খ

  Short wave, ultrasound and cold compress

  গ

  Cold compress, microwave and electrical impulse

  ঘ

  Electrical impulse, microwave and ultrasound
• What surgical functions are performed by the diathermy machine?
  ক

  cutting, coagulation, fulguration

  খ

  cutting, fulguration

  গ

  cutting, coagulation

  ঘ

  coagulation, fulguration
• For what all purposes is diathermy principal used?
  ক

  Surgical and Therapeutic

  খ

  Therapeutic and Diagnostic

  গ

  Diagnostic and surgical

  ঘ

  Diagnostic and rehabilitative