Biology · Physics

Diagnostic Imaging

1,100 Questions

Diagnostic imaging involves various techniques used to look inside the human body for diagnosis and treatment. This covers technologies like computed tomography, ultrasound, and magnetic resonance imaging. These questions often appear in general science and general awareness examinations.

Medical imaging technologiesRadiation therapyDiagnostic proceduresNon-destructive testing

Diagnostic Imaging Questions

Multiple choice

The only microscope that gives 3D' images is

  1. compound microscope

  2. electron microscope

  3. scanning electron microscope

  4. fluorescent microscope
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 The only microscope that gives 3D' images is scanning electron microscope.

Multiple choice

Which is the modern tool for imaging brain tumours?

  1. X - rays

  2. magnetic resonance

  3. electron spin-resonance

  4. ultrasound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Magnetic Resonance Imaging (MRI) is the modern standard for imaging brain tumors. It uses powerful magnets and radio waves to create detailed images of soft tissues, which is superior to X-rays or ultrasound for brain analysis.

Multiple choice

Which waves are used in sonography?

  1. Microwaves

  2. Infra-red rays

  3. Sound waves

  4. Ultrasonic waves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sonography, also known as ultrasound imaging, utilizes high-frequency sound waves that are above the human hearing range (typically above 20,000 Hz). These ultrasonic waves reflect off internal body structures to create detailed images for medical diagnosis. Other waves like microwaves or infra-red rays are electromagnetic and serve different purposes.

Multiple choice

Echogenic focus is a bright spot seen in human organs. In which of the following conditions are five or more echogenic foci per view in either or both testes observed?

  1. Testicular microlithiasis

  2. Epididymal cyst

  3. Appendix testis

  4. Testicular torsion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In testicular microlithiasis, five or more echogenic foci per view in either or both testes are observed. The actual cause of testicular microlithasis is unknown. It may be a reason of tesicular cancer in some individuals.

Multiple choice

Which is the modern technique for imaging brain tumours?

  1. X-Rays

  2. Magnetic Resonance

  3. Electron Spin Resonance

  4. Ultrasound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Magnetic Resonance Imaging (MRI) is the standard and most effective modern technique for visualizing soft tissues, including brain tumors, without using ionizing radiation.

Multiple choice

The enzymes used in many medical diagnostic techniques are ________.

  1. transferases

  2. lyases

  3. isomerases

  4. ligases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This class of enzymes is responsible for the catalysis, of biochemical reactions, during which the ions other than hydrogen, are transferred between the reactants. A good example of this type of enzyme, is the class known as the transamidases, that transfer amide ions across reactants; many medical diagnostic techniques employ these enzymes.

Multiple choice

Which of the following techniques is specifically used to visualise blood vessels in bony or dense soft tissues?

  1. Digital subtraction angiography

  2. Peripheral angiography

  3. Magnetic resonance angiography

  4. Microangiography
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Digital subtraction angiography is used to visualise arterial and venous supply to the brain. This is a fluorescence technique to clearly visualise blood vessels in bony or dense soft tissues, like brain.

Multiple choice

Cardiac catheterisation is the insertion of a catheter into a chamber or vessel of the heart for diagnostic and interventional purposes. Which of the following techniques is used to visualise the path of the catheter as it enters the heart or the coronary arteries?

  1. Cardioscopy

  2. Fluoroscopy

  3. Pneumoscopy

  4. Arthroscopy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fluoroscopy is a technique to visualise the path of the catheter as it enters the heart or the coronary arteries. The use of fluoroscopy requires radiopaque contrast.

Multiple choice

Angiocardiography is a technique for radiographic examination of the heart chambers, thoracic veins and arteries that exploit the radiocontrast agent. Which of the following radiocontrast agents is used in angiocardiography?

  1. Barium

  2. Thorium dioxide

  3. Iodine

  4. CO2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Radiocontrast agents used in angiocardiography contain iodine. Ionic iodine and non-ionic iodine based contrast media are used most commonly due to their solubility and their relatively harmless interaction with the body.

Multiple choice

Transesophageal echocardiogram (TEE) is an alternative way to perform an echocardiogram. Which of the following is false about TEE?

  1. TEE has a very high sensitivity for locating a blood clot inside the left atrium.

  2. TEE is of limited use for the structures at the back of the heart of adults, such as the left atrial appendage.

  3. TEE may require sedation or general anesthesia.

  4. TEE is very useful during many cardiac surgical procedures, like mitral valve repair.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is false. TEE gives a clearer image of structures that are difficult to view transthoracically because the heart rests directly upon the esophagus, leaving only millimeters that the ultrasound beam has to travel.

Multiple choice

Ultrasound imaging is useful in diagnosing

  1. brain disorders

  2. gall stones

  3. cirrhosis

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultrasound is a versatile diagnostic tool used to visualize soft tissues and organs, including the brain (in infants), gallstones, and liver conditions like cirrhosis.

Multiple choice

The unit of CT scan image is

  1. pixel

  2. tesla

  3. photons

  4. electrons
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A CT scan image is composed of a grid of picture elements, known as pixels. The density of these pixels is measured in Hounsfield units.

Multiple choice

What is X-Ray flag 08?

  1. It is a treatment for H5N1 virus.

  2. It is a missile developed by Russia.

  3. It is an international defence exercise.

  4. It is a new technique for detecting bone deformities.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

X-Ray 08 was an international maritime defense exercise conducted by the Indian Navy in 2008, involving multiple countries.