MHMS • 2026 • Paper-IV (Technical Paper - II)
If the prescribed dose is 200 cGy and the dose rate is 100 cGy/min, the treatment time is: (Time=Dose/Dose rate)
A)
1 minute
B)
2 minutes
C)
3 minutes
D)
4 minutes
Option B is correct: time=dose/rate=200/100=2 minutes.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Codes of practice in radiation protection are designed to:
A)
Ensure safe use of radiation
B)
Increase radiation exposure
C)
Replace medical imaging
D)
Delay treatment
Option A is correct: Ensure safe use of radiation.
MHMS • 2026 • Paper-IV (Technical Paper - II)
If the hinge angle is 90°, what wedge angle is required? (Formula W=90-H/2)
A)
30°
B)
35°
C)
40°
D)
45°
Option D is correct: W=90−H/2=90−45=45°.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Cell that divide rapidly are generally:
A)
Radioresistant
B)
Radiosensitive
C)
Immune
D)
Non-reactive
Option A is correct: Radioresistant.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The recommended annual effective dose limit for radiation workers is:
A)
1 mSv
B)
5 mSv
C)
20 mSv
D)
100 mSv
Option C is correct: 20 mSv.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Reduced saliva production after radiation is known as:
A)
Xerostomia
B)
Dysphagia
C)
Aphagia
D)
Dyspnea
Option A is correct: Xerostomia.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Radiosensitivity of a tumor depends primarily on:
A)
Patient age
B)
Rate of cell division and differentiation
C)
Type of cells
D)
Tumor location
Option A is correct: Patient age.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Aseptic technique should be followed during:
A)
Injections and medical procedures
B)
Cleaning floors only
C)
Writing reports
D)
Patient registration
Option A is correct: Injections and medical procedures.
MHMS • 2026 • Paper-IV (Technical Paper - II)
A common symptom of paranasal sinus tumor is:
A)
Nasal obstruction
B)
Facial swelling
C)
Nose bleeding
D)
All of the above
Option A is correct: Nasal obstruction.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Interstitial brachytherapy involves:
A)
Placing sources in body cavities
B)
Direct implantation of radioactive sources into tissues
C)
Surface applicators only
D)
Teletherapy
Option B is correct: Direct implantation of radioactive sources into tissues.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Gloves should be worn when:
A)
Handling blood or body fluids
B)
Reading reports
C)
Talking to patients
D)
Walking in hospital
Option B is correct: Reading reports.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Shortening the overall treatment time without changing total dose is called:
A)
Hyperfractionation
B)
Acceleration fractionation
C)
Hypofractionation
D)
Protraction
Option B is correct: Acceleration fractionation.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The most effective method to prevent infection spread is:
A)
Hand washing
B)
Wearing jewelry
C)
Talking loudly
D)
Wearing perfume
Option A is correct: Hand washing.
MHMS • 2026 • Paper-IV (Technical Paper - II)
In radiotherapy, late-responding tissues include:
A)
Skin and mucosa
B)
Spinal cord, kidney, lung
C)
Bone marrow
D)
Hair follicles
Option B is correct: Spinal cord, kidney, lung.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Organ at Risk (OAR) refers to:
A)
Tumor tissue
B)
Normal organs sensitive to radiation
C)
Radiation machines
D)
Treatment couch
Option B is correct: Normal organs sensitive to radiation.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The main purpose of image fusion in radiotherapy is to:
A)
Reduce radiation dose to the patient
B)
Combine images from different modalities for accurate tumor localization
C)
Speed up treatment delivery
D)
Replace CT imaging entirely
Option B is correct: Combine images from different modalities for accurate tumor localization.
MHMS • 2026 • Paper-IV (Technical Paper - II)
According to guidelines of AERB for the construction of a radiotherapy room, construction material should be concrete with density of:
A)
1.35gm/cc
B)
2.25gm/cc
C)
2.35gm/cc
D)
2.45gm/cc
Option B is correct: 2.25gm/cc.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The ALARA principle mainly focuses on:
A)
Reducing unnecessary radiation exposure
B)
Increasing radiation dose
C)
Ignoring radiation protection
D)
Eliminating radiation equipment
Option A is correct: Reducing unnecessary radiation exposure.
MHMS • 2026 • Paper-IV (Technical Paper - II)
In TNM staging: ‘T’ refers to:
A)
Time of diagnosis
B)
Size and extent of primary tumor
C)
Type of tumor
D)
Total radiation dose
Option B is correct: Size and extent of primary tumor.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Oxygen effect in radiotherapy refers to:
A)
Oxygen reduces radiosensitivity
B)
Oxygen enhances radiation-induced cell killing
C)
Oxygen causes DNA repair
D)
Oxygen prevents radiotherapy
Option B is correct: Oxygen enhances radiation-induced cell killing.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Loss of hair due to radiation is called:
A)
Dermatitis
B)
Alopecia
C)
Necrosis
D)
Fibrosis
Option B is correct: Alopecia.
MHMS • 2026 • Paper-IV (Technical Paper - II)
PET-CT is particularly useful for:
A)
Detecting small brain metastases
B)
Assessing metabolic activity and detecting occult metastases
C)
Measuring radiation dose
D)
Only for head and neck cancers
Option B is correct: Assessing metabolic activity and detecting occult metastases.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Scatter radiation mainly originates from:
A)
Patient’s body
B)
Electrical cables
C)
Control panel
D)
Shielding walls
Option B is correct: Electrical cables.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Radiotherapy is less effective in tumors that are:
A)
Rapidly dividing
B)
Well-oxygenated
C)
Hypoxic
D)
Radiosensitive
Option C is correct: Hypoxic.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Compared to conformal blocks, MLC generally:
A)
Increases treatment preparation time
B)
Eliminates the need for block storage
C)
Requires manual casting
D)
Cannot be computer controlled
Option C is correct: Requires manual casting.
