MHMS • 2026 • Paper-IV (Technical Paper - II)
A dose of 200 cGy is prescribed at depth. Dose rate at surface = 100 cGy/min, PDD = 80%. What is the treatment time? (Treatment time = Dose/(Dose rate x PDD))
A)
2 min
B)
2.5 min
C)
3 min
D)
3.5 min
Option B is correct: time=200/(100×0.80)=2.5 minutes.
MHMS • 2026 • Paper-IV (Technical Paper - II)
3D-CRT stands for:
A)
Three Diamensional Computed Radiotherapy
B)
Three Diamensional Conformal Radiotherapy
C)
Three Diamensional Controlled Radiotherapy
D)
Three Diamensional Cancer Radiotherapy
Option B is correct: Three Diamensional Conformal Radiotherapy.
MHMS • 2026 • Paper-IV (Technical Paper - II)
According to radiation safety guidelines, shielding must ensure that:
A)
Dose limits are not exceeded
B)
Radiation exposure increases
C)
Machines work faster
D)
Patients receive maximum dose
Option A is correct: Dose limits are not exceeded.
MHMS • 2026 • Paper-IV (Technical Paper - II)
A Multi-Leaf Collimator (MLC) is mainly used in which technique?
A)
Conventional radiotherapy
B)
Conformal radiotherapy
C)
Orthovoltage therapy
D)
Brachytherapy
Option C is correct: Orthovoltage therapy.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The three basic principles of radiation protection recommended by the International Commission on Radiological Protection are:
A)
Justification, Optimization, Dose Limitation
B)
Imaging, Diagnosis, Treatment
C)
Time, Distance, Speed
D)
Measurement, Calculation, Therapy
Option A is correct: Justification, Optimization, Dose Limitation.
MHMS • 2026 • Paper-IV (Technical Paper - II)
According to radiation safety, exposure to radiation is:
A)
Directly proportional to time
B)
Inversely proportional to time
C)
Independent of time
D)
Always constant
Option A is correct: Directly proportional to time.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The main target of radiation damage in the cell is:
A)
Cytoplasm
B)
Cell membrane
C)
DNA
D)
Mitochondria
Option D is correct: Mitochondria.
MHMS • 2026 • Paper-IV (Technical Paper - II)
An example of deterministic effect is:
A)
Skin erythema
B)
Genetic mutation
C)
Cancer
D)
Leukemia
Option A is correct: Skin erythema.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Beam quality is mainly determined by:
A)
Machine brand
B)
Beam energy
C)
Field size only
D)
Fraction number
Option C is correct: Field size only.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Pyriform fossa is part of the:
A)
Oropharynx
B)
Hypopharynx
C)
Nasopharynx
D)
Larynx
Option B is correct: Hypopharynx.
MHMS • 2026 • Paper-IV (Technical Paper - II)
A radiotherapy technologist may face legal action if:
A)
They perform duties responsibly
B)
They cause harm due to negligence
C)
They follow safety procedures
D)
They maintain records
Option A is correct: They perform duties responsibly.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The main lymphatic drainage of the breast is to:
A)
Inguinal lymph nodes
B)
Axillary lymph nodes
C)
Pelvic lymph nodes
D)
Cervical lymph nodes
Option B is correct: Axillary lymph nodes.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Treatment time in Telecobalt therapy mainly depends on:
A)
Prescribed dose
B)
Dose rate of the machine
C)
Field size and depth factors
D)
All of the above
Option B is correct: Dose rate of the machine.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Occupancy factor is important because:
A)
People may stay in adjacent areas
B)
Radiation intensity changes
C)
Machines produce more radiation
D)
Patients require longer treatment
Option B is correct: Radiation intensity changes.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Spinal cord tumors may be classified as:
A)
Intramedullary
B)
Extramedullary
C)
Extradural
D)
All of the above
Option D is correct: All of the above.
MHMS • 2026 • Paper-IV (Technical Paper - II)
In any radiation emergency situation, the technologist should:
A)
Inform the doctor immediately
B)
Inform the RSO immediately
C)
Leave the department
D)
Continue routine work
Option B is correct: Inform the RSO immediately.
MHMS • 2026 • Paper-IV (Technical Paper - II)
During radiotherapy treatment, the technologist should:
A)
Leave the patient unattended without monitoring
B)
Monitor the patient through camera and intercom
C)
Stay inside the treatment room
D)
Turn off machines
Option B is correct: Monitor the patient through camera and intercom.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Histopathologic classification of tumors is primarily based on:
A)
Tumor size
B)
Cell of origin and microscopic appearance
C)
Patient age
D)
Radiation sensitivity
Option C is correct: Patient age.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Which isotope was historically used in brachytherapy but is now rarely used due to safety concerns?
A)
Radium-226
B)
Iridium-192
C)
Cesium-137
D)
Cobalt-60
Option A is correct: Radium-226.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Empathy in patient care means:
A)
Ignoring patient emotions
B)
Understanding and sharing patient feelings
C)
Doing the procedure quickly without explaining
D)
Avoiding conversation
Option B is correct: Understanding and sharing patient feelings.
MHMS • 2026 • Paper-IV (Technical Paper - II)
IMRT helps to:
A)
Increase radiation exposure to normal tissue
B)
Reduce dose to surrounding healthy organs
C)
Avoid radiation treatment
D)
Increase patient movement
Option B is correct: Reduce dose to surrounding healthy organs.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Planning Target Volume (PTV) is created to:
A)
Include tumor only
B)
Compensate for setup errors and patient movement
C)
Reduce tumor size
D)
Replace treatment planning
Option B is correct: Compensate for setup errors and patient movement.
MHMS • 2026 • Paper-IV (Technical Paper - II)
Asepsis means:
A)
Presence of micro-organisms
B)
Absence of disease-causing microorganisms
C)
Using only antibiotics for treatment
D)
Growth of bacteria
Option A is correct: Presence of micro-organisms.
MHMS • 2026 • Paper-IV (Technical Paper - II)
A deterministic effect of radiation has:
A)
A threshold dose
B)
No threshold dose
C)
No biological effect
D)
No relation with dose
Option A is correct: A threshold dose.
MHMS • 2026 • Paper-IV (Technical Paper - II)
The wedge angle is defined as the angle between:
A)
Central axis and beam edge and the patient surface
B)
Isodose curve (usually 50%) and a line perpendicular to the beam axis.
C)
Two treatment beams
D)
Surface and central axis
Option B is correct: Isodose curve (usually 50%) and a line perpendicular to the beam axis..
