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

Which waves are used in sonography?

  1. Micro waves

  2. Light waves

  3. Ultrasonic waves

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

Sonography (ultrasound imaging) uses ultrasonic waves - high-frequency sound waves above human hearing range (typically 2-18 MHz). These waves can penetrate tissue and reflect off internal structures, creating images of organs and fetuses. The other options (microwaves, light waves, infrared) are electromagnetic waves, not sound.

Multiple choice

Consider the following statements:

(1) The photocopy machines emit UV radiations which can cause eye problems. (2) UV radiations can be used to determine the temperature of objects, which is known as thermography. (3) CT scan uses computer processed X- rays and generates a three dimensional image of specific areas of the body.

Which of the given statements is/are true?

  1. Only (1)

  2. Only (2)

  3. Only (1) and (3)

  4. Only (2) and (3)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement (1) is correct. The photocopy machines emit UV radiations, which can cause eye problems.

Statement (2) is wrong. Infrared thermography (IRT), thermal imaging and thermal video are examples of infrared imaging science. Thermographic cameras usually detect radiation in the long-infrared range of the electromagnetic spectrum (roughly 9,000–14,000 nanometers or 9–14 µm) and produce images of that radiation, called thermograms. Statement (3) is correct. CT scan uses computer processed X- rays and generates a three dimensional image of specific areas of the body.
 

Multiple choice

Biological false positive widal is seen in ________________.

  1. malarial infection

  2. myocardial infection

  3. leptospirosis

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

Widal test It is a serological test to diagnose typhoid. It measures H and Q agglutinins for typhoid and paratyphoid bacilli. It is a tube agglutination reaction. Causes of false negative widal are a. Carrier state b. Inadequate amount of bacterium in the host c. Technical errors d.  Previous antibiotic treatment

Multiple choice

Consider the following facts:

  1. Magnetic Resonance Imaging (MRI) is a less effective way of picturing the interiors of the body than an X-ray.
  2. It is an application of nuclear medicine, since it uses nuclear magnetic resonance to create images of nuclei within the body.
  3. In this technique, a patient is actually made to lie within a large magnet before his interior organs can be pictured.

Which of the above is/are true?

  1. 1 and 2

  2. 2 only

  3. 2 and 3

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance Imaging (NMRI), or Magnetic Resonance Tomography (MRT) is a medical imaging technique used in radiology to visualise internal structures of the body in detail. MRI makes use of the property of nuclear magnetic resonance (NMR) to image nuclei of atoms inside the body. MRI can create more detailed images of the human body than are possible with X-rays. An MRI scanner is a device in which the patient lies within a large, powerful magnet where the magnetic field is used to align the magnetisation of some atomic nuclei in the body, and radio frequency magnetic fields are applied to systematically alter the alignment of this magnetisation.

Multiple choice

The gold standard for the diagnosis of osteoporosis is __________.

  1. dual energy x-ray absorptiometry

  2. single energy x-ray absorptiometry

  3. ultrasound

  4. quantitative computed tomography
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gold standard method of clinical bone mineral measurement, currently widely accepted is DX (dual energy x-ray absortimetry). If showed significant correlation between bone density values in jaws and those of lumbar spine, femoral neck and foramen. In osteoporosis, density of bone mineralization is reduced due to calcium loss and is assessed effective on DXA.

Multiple choice

Consider the following statements:

(1) Barium sulphate is used for diagnostic X-ray imaging. (2) Zinc is present in human tears.

Which of the given statements is/are correct?

  1. Only (1)

  2. Only (2)

  3. Both (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. Barium sulphate in suspension is frequently used clinically as a radiocontrast agent for X-ray imaging and other diagnostic procedures. Statement 2 is also correct. Zinc compounds are mostly found in human tears.

Multiple choice

Which of the following options is TRUE?

  1. X-rays are used in astronomy.

  2. X-rays can penetrate through human flesh.

  3. X-rays can pass through metallic materials.

  4. X-rays are used in optical microscopy.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

X-rays can penetrate through human flesh.

Multiple choice

X-rays are used in

  1. radio therapy to cure tumors

  2. sterilizing surgical instruments

  3. studying the structure of molecules

  4. detecting invisible writings
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

X-rays are used in radio therapy to cure tumors.

Multiple choice

Which of the following is not a use of ultrasound?

  1. Breaking small stones in kidneys

  2. Locating underwater objects

  3. Cleaning odd-shaped parts and electronic components

  4. Joining cracks and flaws in metal blocks
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultrasound can detect cracks and flaws in metal blocks, but cannot join them.