Question Bank
OPSC Assistant Professor (Radiodiagnosis) Exam - English
Duration: 180 · Questions: 200 · Max Marks: 200 · Language: 1
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Radiodiagnosis
1
The production of X-rays occurs in the:
2
The cathode in an X-ray tube is responsible for:
3
The target material in the anode is typically made of:
4
What controls the energy (quality) of the X-ray beam?
5
What determines the number (quantity) of X-rays produced?
6
The term "bremsstrahlung" refers to:
7
Characteristic X-rays are produced when:
8
The efficiency of X-ray production in an X-ray tube is approximately:
9
The heel effect results in:
10
Which factor reduces the heat load on the anode?
11
Which interaction predominates at lower X-ray energies?
12
The photoelectric effect is more likely to occur in:
13
Compton scattering primarily affects:
14
Pair production occurs when the photon energy exceeds:
15
What interaction dominates in diagnostic radiology (20-150 keV range)?
16
Tissue contrast in an X-ray image depends on:
17
Which factor increases Compton scattering?
18
High atomic number materials are used for radiographic contrast because they:
19
Air appears dark on an X-ray image because:
20
Grid use in X-ray imaging reduces:
21
Increasing kVp results in:
22
Contrast agents like iodine are used to enhance:
23
A high contrast X-ray image requires:
24
Reducing the focal spot size in the X-ray tube improves:
25
The main purpose of filtration in X-ray machines is to:
26
What is the effect of increasing the distance between the X-ray tube and the patient?
27
The inverse square law in radiography states that:
28
Collimators are used in radiography to:
29
The spatial resolution of an X-ray image depends on:
30
Motion artifacts in X-ray images can be minimized by:
31
The primary reason for using lead aprons in radiography is to:
32
Occupational radiation exposure is most effectively monitored using:
33
A primary barrier in radiography rooms is designed to:
34
The ALARA principle in radiography stands for:
35
What is the purpose of the automatic exposure control (AEC) in X-ray machines?
36
The rotating anode in X-ray tubes is used to:
37
Regular calibration of X-ray machines is essential to:
38
The filtration of an X-ray beam removes:
39
The role of a collimator in an X-ray system includes:
40
Digital radiography offers the advantage of:
41
Flat-panel detectors are commonly used in:
42
Image noise in digital radiography can be reduced by:
43
PACS (Picture Archiving and Communication System) is used for:
44
In computed radiography, the imaging plate is coated with:
45
Grid cut-off artifacts occur due to:
46
Quantum mottle is caused by:
47
A blurred X-ray image can be caused by:
48
The most common cause of repeated radiographs is:
49
Overexposure artifacts in digital radiography appear as:
50
The ALARA principle in radiology refers to:
51
Lead aprons primarily protect against:
52
The unit of radiation exposure in air is:
53
A dosimeter is used to:
54
Which protective device is used to reduce thyroid exposure during radiography?
55
The maximum permissible dose for radiology personnel annually is:
56
Which material is most commonly used for radiation shielding in radiology rooms?
57
Radiation badges measure exposure using:
58
The purpose of collimation in radiography is to:
59
Gonadal shielding is most effective when placed:
60
The unit of effective dose is:
61
The primary purpose of beam filtration is to:
62
Which device measures the cumulative radiation dose received over time?
63
Which organ is most sensitive to radiation?
64
The “ten-day rule” in radiology refers to:
65
The contrast of an X-ray image is primarily determined by:
66
Increasing the mA in X-ray imaging results in:
67
The relationship between kVp and image contrast is:
68
Spatial resolution in digital radiography depends on:
69
Which factor is most critical in reducing image noise?
70
Motion blur in radiography can be minimized by:
71
Grid usage in X-ray imaging helps:
72
Focal spot size affects:
73
Quantum mottle in digital X-rays occurs due to:
74
Increasing the distance between the X-ray tube and the detector results in:
75
What does "signal-to-noise ratio" (SNR) represent in radiography?
76
High contrast images are typically achieved using:
77
Scatter radiation is reduced by:
78
The "penumbra" in an X-ray image refers to:
79
The relationship between field size and scatter is:
80
The primary function of a radiation monitoring badge is to:
81
Protective barriers in radiology rooms are designed based on:
82
Which of the following reduces radiation exposure to the radiographer?
83
Which of these is a personal protective device in radiology?
84
The term “occupational dose” refers to:
85
The sharpness of an X-ray image depends on:
86
What happens to image noise when mAs is increased?
87
Which factor improves image contrast in X-ray imaging?
88
Magnification in X-ray images can be minimized by:
89
A high signal-to-noise ratio (SNR) results in:
90
Which of these factors reduces quantum mottle?
91
Collimation is used in radiography to:
92
The spatial resolution of an X-ray image increases when:
93
The term "grid ratio" refers to:
94
What effect does a higher grid ratio have on image quality?
95
The most effective way to reduce patient dose in radiography is:
96
Which method reduces scatter radiation during X-ray imaging?
97
High contrast images are generally associated with:
98
The inverse square law in radiography states that:
99
Reducing the source-to-image distance (SID) will:
100
The primary function of an intensifying screen in radiography is to:
101
Which bone forms the medial wall of the orbit?
102
On a coronal CT scan, which structure is located posterior to the trachea?
103
Which muscle is seen as a triangular structure in the axilla on axial CT images?
104
What is the primary blood supply to the liver?
105
Which structure is located in the anterior cranial fossa on a sagittal MRI?
106
On a chest X-ray, which structure forms the right heart border?
107
Which nerve runs through the carpal tunnel?
108
On an axial CT scan of the brain, which structure is located in the midline?
109
Which artery supplies the medial aspect of the cerebral hemispheres?
110
On a coronal MRI of the pelvis, which structure lies posterior to the bladder in males?
111
Which bone forms the lateral wall of the nasal cavity?
112
On a chest X-ray, which structure forms the left heart border?
113
Which structure is located in the posterior cranial fossa on a sagittal MRI?
114
What is the primary blood supply to the stomach?
115
On an axial CT scan of the abdomen, which structure lies anterior to the pancreas?
116
Which nerve innervates the diaphragm?
117
On a coronal MRI of the knee, which structure connects the femur to the tibia?
118
Which artery supplies the posterior aspect of the cerebral hemispheres?
119
On a chest X-ray, which structure forms the diaphragmatic dome?
120
Which bone forms the floor of the orbit?
121
On an axial CT scan of the pelvis, which structure lies lateral to the rectum?
122
Which structure is seen as a midline structure on a coronal MRI of the brain?
123
What is the primary blood supply to the kidneys?
124
On a sagittal MRI of the spine, which structure lies posterior to the spinal cord?
125
Which nerve innervates the biceps brachii muscle?
126
On a chest X-ray, which structure forms the costophrenic angle?
127
Which structure is located in the middle cranial fossa on a sagittal MRI?
128
On an axial CT scan of the abdomen, which structure lies posterior to the kidneys?
129
Which artery supplies the lateral aspect of the cerebral hemispheres?
130
On a coronal MRI of the pelvis, which structure lies superior to the bladder in females?
131
What is the primary function of the glomerular filtration barrier?
132
Which hormone regulates calcium levels in the blood?
133
What is the primary pathophysiological mechanism of pulmonary edema?
134
Which structure regulates blood pressure through the renin-angiotensin system?
135
What is the primary cause of atelectasis on a chest X-ray?
136
Which hormone is responsible for regulating blood glucose levels?
137
What is the primary pathophysiological mechanism of pneumothorax?
138
Which structure regulates sodium and water balance in the body?
139
What is the primary cause of pleural effusion seen on imaging?
140
Which hormone is responsible for erythropoiesis?
141
What is the primary pathophysiological mechanism of cerebral edema?
142
Which structure regulates acid-base balance in the body?
143
What is the primary cause of ascites seen on abdominal imaging?
144
Which hormone is responsible for regulating blood pressure?
145
What is the primary pathophysiological mechanism of myocardial infarction?
146
Which structure regulates body temperature?
147
What is the primary cause of pulmonary embolism seen on CT pulmonary angiography?
148
Which hormone is responsible for regulating metabolism?
149
What is the primary pathophysiological mechanism of hydrocephalus?
150
Which structure regulates blood volume?
151
What is the primary cause of a brain abscess seen on MRI?
152
Which hormone is responsible for regulating stress response?
153
What is the primary pathophysiological mechanism of stroke?
154
Which structure regulates oxygen levels in the blood?
155
What is the primary cause of pneumothorax seen on chest X-ray?
156
What is the primary source of X-rays in a radiographic tube?
157
Which parameter controls the energy of X-rays?
158
What is the primary advantage of CT over conventional X-ray?
159
Which imaging modality uses magnetic fields and radio waves?
160
What is the primary source of contrast in T1-weighted MRI?
161
Which ultrasound mode is used to assess blood flow?
162
What is the primary isotope used in PET imaging?
163
Which parameter controls the quantity of X-rays?
164
What is the primary advantage of MRI over CT?
165
Which imaging modality uses high-frequency sound waves?
166
What is the primary source of contrast in T2-weighted MRI?
167
Which isotope is commonly used in bone scans?
168
What is the primary function of a collimator in X-ray imaging?
169
Which CT parameter controls image resolution?
170
What is the primary advantage of ultrasound over CT?
171
Which MRI sequence is best for detecting edema?
172
What is the primary source of radiation in nuclear medicine?
173
Which parameter improves image contrast in X-ray imaging?
174
What is the primary advantage of PET over SPECT?
175
Which ultrasound parameter controls depth of penetration?
176
What is the primary source of contrast in CT imaging?
177
Which isotope is used in thyroid imaging?
178
What is the primary function of a grid in X-ray imaging?
179
Which MRI sequence is best for detecting hemorrhage?
180
What is the primary advantage of nuclear medicine over CT?
181
On a coronal CT scan of the brain, which structure lies superior to the cerebellum?
182
Which artery supplies the head of the pancreas?
183
On an axial MRI of the knee, which structure lies posterior to the femur?
184
Which nerve innervates the quadriceps femoris muscle?
185
On a chest X-ray, which structure forms the left upper heart border?
186
Which structure lies posterior to the stomach on an axial CT scan?
187
What is the primary pathophysiological mechanism of cirrhosis?
188
Which hormone regulates water reabsorption in the kidneys?
189
What is the primary cause of a brain tumor seen on MRI?
190
Which structure regulates blood glucose levels through insulin secretion?
191
What is the primary pathophysiological mechanism of emphysema?
192
Which hormone regulates bone metabolism?
193
What is the primary cause of a subdural hematoma seen on CT?
194
Which structure regulates blood pH through bicarbonate?
195
What is the primary pathophysiological mechanism of aortic dissection?
196
Which parameter controls the brightness of an X-ray image?
197
What is the primary advantage of CT angiography over conventional angiography?
198
Which MRI sequence is best for detecting tumors?
199
Which ultrasound mode is used to assess cardiac motion?
200
What is the primary isotope used in SPECT imaging?