Biology · Physics

Diagnostic Imaging

984 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 botany cell and cellular organization cell theory microscope cell and its discovery

A student wants to study the metaphasic behaviour of chromosomes in a living cell. The technique most suitable is

  1. Phase-contrast microscope.

  2. X-ray microscope.

  3. Cell fractionation.

  4. Scanning electron microscope.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phase contrast microscopy is a type of microscopic technique which converts phase shifts in light passing through a transparent specimen to brightness changes in the image. This technique made possible to study living cells without staining.

Hence A is the correct option. 

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The conjugation of antibodies with which of the following is useful in fluorescence microscopy?

  1. Metal ions

  2. Dyes

  3. Carbohydrates

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

In immunofluorescence, antibodies are conjugated with fluorescent dyes (fluorophores) to detect specific antigens within a sample under a fluorescence microscope.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The only microscope which 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

Scanning electron microscopes do provide 3D images but not naturally. However, 3D images can be obtained by different methods such as:
Photogrammetry where 2 or 3 images are there from tilted specimen.
Photometric stereo where there is use of 4 images from detector.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

A fluorescent microscope is used

  1. For increasing resolving power.

  2. For obtaining X-ray diffraction pattern of DNA.

  3. To study cell and their components in a living state.

  4. To localise cell structure stained with fluorochrome dyes.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A fluorescence microscope is an optical microscope that uses fluorescence and phosphorescence instead of or in addition to, reflection and absorption to study properties of organic or inorganic substances. The "fluorescence microscope" refers to any microscope that uses fluorescence to generate an image, whether it is a more simple set up like an epifluorescence microscope or a more complicated design such as a confocal microscope, which uses optical sectioning to get better resolution of the fluorescent image. So, fluorescent microscope is used to localise cell structure stained with fluorochrome dyes and not for increasing resolving power, for obtaining X-ray diffraction pattern of DNA and to study cell and their components in a living state. 

Multiple choice

What do we call a doctor who specializes in x-rays?

  1. radiologist

  2. anesthesiologist

  3. pediatrician

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

A radiologist is a medical doctor who specializes in diagnosing and treating diseases and injuries using medical imaging techniques, such as x-rays, CT scans, and MRIs. Other options like pediatricians specialize in children, and podiatrists specialize in feet.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Infrared radiations are used in

  1. Microwave ovens

  2. Long distance photography

  3. Microscopes

  4. Treatment of cancer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Infrared radiation are used in microwaves ovens in electronagnetiic spectrum frequency and energy of microwave is smaller than visible light water contain is required for coobing food in microwave oven almost all food item contain some water contain.Microwaves interact with water molecules all atoms via their electric and magnetic fileds. Temprature of water molecules increases by this these water molecule share this energy with neighbouring food molecules, heating up the food.

Multiple choice physics magnetism and electromagnetism applications of electromagnets transformer transformers

The magnetic resonance imaging is used as a tool of diagnosis to detect the injuries in human body. It is based on the principle that:

  1. Protons in different types of human tissues have specific magnetic field environment

  2. Magnetic field pattern of human body resonates with the externally applied magnetic field
  3. Either $(1)$ or $(2)$
  4. Neither $(1)$ nor $(2)$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The basic principle of MRI is protons in different types of human tissues have specific magnetic field environment.

Multiple choice

Which of the following is a common type of non-destructive testing method?

  1. Ultrasonic testing

  2. Radiographic testing

  3. Magnetic particle testing

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultrasonic testing, radiographic testing, and magnetic particle testing are all common types of non-destructive testing methods.

Multiple choice

Which property of ultrasonic waves makes them useful for medical imaging?

  1. High frequency

  2. Low intensity

  3. Long wavelength

  4. High absorption in tissues
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The high frequency of ultrasonic waves allows for better resolution and penetration in medical imaging, enabling the visualization of internal organs and structures.

Multiple choice

In magnetic resonance imaging (MRI), what optimization approach is employed to minimize artifacts caused by motion?

  1. Gradient Descent

  2. Dynamic Programming

  3. Particle Swarm Optimization

  4. Branch and Bound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dynamic programming is often used in MRI to find an optimal sequence of pulses that minimizes motion artifacts while maintaining image quality.

Multiple choice

Which respiratory health screening test is used to detect lung cancer at an early stage?

  1. Chest X-ray

  2. Spirometry

  3. Pulse Oximetry

  4. Low-dose CT scan
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A low-dose CT scan is used to detect lung cancer at an early stage, particularly in individuals at high risk.

Multiple choice

Which of the following is a common biotechnology technique used in diagnostics?

  1. Polymerase Chain Reaction (PCR)

  2. Magnetic Resonance Imaging (MRI)

  3. Ultrasound

  4. X-ray
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polymerase Chain Reaction (PCR) is a fundamental biotechnology technique that allows for the amplification of specific DNA sequences, enabling the detection and analysis of genetic material.

Multiple choice

Which biotechnology technique is commonly used for rapid pathogen detection?

  1. Immunoassay

  2. Electrophoresis

  3. Chromatography

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

Immunoassays, such as enzyme-linked immunosorbent assays (ELISA), are widely used in diagnostics for rapid pathogen detection by utilizing antibodies to identify specific antigens associated with the pathogen.

Multiple choice

Which biotechnology technique is employed in prenatal diagnostics?

  1. Karyotyping

  2. Ultrasound

  3. X-ray

  4. Magnetic Resonance Imaging (MRI)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Karyotyping, the analysis of chromosomes, is a biotechnology technique used in prenatal diagnostics to identify chromosomal abnormalities and genetic disorders in the developing fetus.