Free radiology MCQ exam model for clinical students

Explanation:

• Stomach → Correct because double contrast enhances mucosal detail.

• Lungs → Incorrect because they are evaluated by X-ray/CT.

• Brain → Incorrect because it is evaluated by CT/MRI.

• Heart → Incorrect because it is evaluated by echo/angiography.

• Kidneys → Incorrect because IVU or CT is used.

Explanation:

• Iodinated contrast → Correct because it enhances CT images.

• Barium sulfate → Incorrect because it is used in GI fluoroscopy.

• Gadolinium → Incorrect because it is used in MRI.

• Air → Incorrect because it is not a contrast agent.

• Carbon dioxide → Incorrect because it is not routinely used.

Explanation:

• MRI without contrast → Correct because it does not use ionizing radiation.

• CT scan → Incorrect because it uses ionizing radiation.

• X-ray → Incorrect because it exposes fetus to radiation.

• PET scan → Incorrect because it uses radioactive tracers.

• Fluoroscopy → Incorrect because it uses continuous X-rays.

Explanation:

• CT scan → Correct because it uses X-rays, which are ionizing radiation.

• Ultrasound → Incorrect because it uses sound waves.

• MRI → Incorrect because it uses magnetic fields and radio waves.

• PET without tracer → Incorrect because PET inherently uses radioactive tracers.

• Doppler study → Incorrect because it is a form of ultrasound.

Explanation:

• ERCP → Correct because it visualizes biliary and pancreatic ducts.

• Barium swallow → Incorrect because it assesses esophagus.

• IVU → Incorrect because it assesses urinary tract.

• Hysterosalpingography → Incorrect because it assesses uterus and tubes.

• Cystography → Incorrect because it assesses bladder.

Explanation:

• MRI → Correct because it provides superior soft tissue contrast resolution.

• X-ray → Incorrect because it has poor soft tissue differentiation.

• CT scan → Incorrect because it is better for bone than soft tissue.

• Ultrasound → Incorrect because it is operator dependent.

• Fluoroscopy → Incorrect because it provides real-time X-ray imaging only.

Explanation:

• Imaging of body structures for diagnosis → Correct because radiology uses imaging techniques to diagnose disease.

• Treatment of diseases using drugs → Incorrect because this is pharmacology.

• Surgical management of diseases → Incorrect because this is surgery.

• Laboratory diagnosis → Incorrect because this is pathology.

• Histological examination → Incorrect because this is histology.

Explanation:

• Absent lung markings → Correct because air in pleural space collapses lung.

• Air bronchogram → Incorrect because it is seen in consolidation.

• Homogeneous opacity → Incorrect because it suggests effusion or consolidation.

• Pleural effusion level → Incorrect because it shows fluid.

• Kerley B lines → Incorrect because they indicate pulmonary edema.

Explanation:

• CT scan brain → Correct because it rapidly detects acute bleeding.

• MRI brain → Incorrect because it is less sensitive in acute phase.

• Ultrasound brain → Incorrect because it is limited to neonates.

• PET scan → Incorrect because it assesses metabolism.

• Skull X-ray → Incorrect because it cannot detect hemorrhage.

Explanation:

• X-ray → Correct because it is quick, cheap, and effective for fractures.

• MRI → Incorrect because it is not first-line for fractures.

• CT scan → Incorrect because it is used for complex fractures.

• Ultrasound → Incorrect because it is not ideal for bone imaging.

• Bone scan → Incorrect because it is used for occult fractures later.