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 biology food through digestive tract role of large intestine in digestion busy at work - our internal organs parts of the digestive system: structure and function

Examination of large intestine for diseases is done by

  1. Colonoscopy

  2. Endoscopy

  3. MRI

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Colonoscopy is the endoscopic examination of the large intestine and the distal part of the small bowel with a CCD camera or a fibre optic camera on a flexible tube passed through the anus. It can provide a visual diagnosis and grants the opportunity for biopsy or removal of suspected colorectal cancer lesions. 

Multiple choice detection and recording of x-ray images option c: imaging physics

Which waves are used in sonography?

  1. Microwaves

  2. Infrared rays

  3. Radio rays

  4. Ultrasonic rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Ultrasound imaging is also termed as the ultrasound scanning or sonography, This technique uses the small probe along with the gel placed on the skin. The sound waves of very high frequency (Ultrasonic sound) are sent into the body via gel using the probes to obtain the images of body parts.

Therefore, the sonography or ultrasonic scanning uses the Ultrasonic rays.
Multiple choice zoology mutation dna fingerprinting human genome project and dna fingerprinting instruments in biotechnology

Assertion : Thermographic imaging is a unique technique.

Reason : Thermographic imaging has some relation with DNA finger printing. 

  1. If both assertion and reason are true and the reason is the correct explanation of the assertion.

  2. If both assertion and reason are true but reason is not the correct explanation of the assertion.

  3. If assertion is true but reason is false.

  4. If the assertion and reason both are false.

  5. If assertion is false but reason is true.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Thermographic imaging is a technique for detecting heat radiation, while DNA fingerprinting is a biological analysis method. They are distinct fields with no direct functional relationship.

Multiple choice botany breeding and biotechnology branches of biotechnology gene cloning biotechnology and genetic engineering

Radiology deals with the study of

  1. UV rays

  2. Gamma rays

  3. Cosmic rays

  4. X-rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radiology is a medical specialty that uses imaging to diagnose and treat disease seen within the body. Radiologists use a variety of imaging techniques such as X-ray radiography, ultrasound, computed tomography (CT), nuclear medicine, positron emission tomography (PET) and magnetic resonance imaging (MRI) to diagnose or treat diseases. 

Multiple choice physics observing space: telescopes maxwell's equations the nature of light introduction to electromagnetic waves

Identify the electromagnetic wave which is most often used in medicine for diagnostic imaging?

  1. infrared

  2. ultraviolet

  3. microwave

  4. radio

  5. gamma ray
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During diagnosis of the body heat signatures of the organs are vital. These heat waves lie in the infrared region of the spectrum.

Therefore, infrared waves are used in diagnostic imaging.

 Option A is, therefore, correct. 

Multiple choice reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

Which of the following technique is misused for sex determination of foetus?

  1. Chromatography

  2. Ultrasound

  3. X- ray radiography

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

An ultrasound scan is a medical test which uses high-frequency sound waves to capture live images from the inside of human body. It is also used for sex determination of fetus. Thus the correct answer is option B.

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Find the incorrect statement

  1. Ultrasound can be used to determine the sex of the unborn baby (embryo)

  2. Ultrasound can be used to keep away rodents in cold storage

  3. Ultrasound can be used to detect even bone fractures

  4. Ultrasound travels faster than sound
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

Ultrasound frequency used for imaging is about $5 MHz.$
The corresponding wavelength is $\lambda = \dfrac{v}{\nu}=\dfrac{1540 \text{m/s}}{5\times 10^6} = 0.3mm$ 
Here speed of ultrasound in tissue is taken to be $1540 m/s$.
So ultrasound can not be used for bone fractures as it bone fracture can have size of few microns.
Ultrasound does not travel faster than sound. Sound speed does not depend on frequency.
$v=\nu \lambda$ if $\nu$ is higher, $\lambda$ becomes smaller and $v$ remains constant.

Multiple choice audible, infra and ultra sound with its application study of sound physics

What are the uses of ultrasonic sounds?

  1. To track medical problems

  2. To study molecular structures

  3. For navigational studies and by animals to locate prey and obstacles

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

Ultrasonic sounds are inaudible to humans, hence they are used for various purposes. These waves strike the object of interest and are reflected back. These reflected waves are captured and the object of interest is studied.

Multiple choice bio-chemistry cell structure membrane bound organelles cell: size and differentiation microscopy

Which of the following statements is false?

  1. Electrophoresis can help separate proteins.

  2. Image formed by compound microscope is vertical and erect.

  3. An angstrom is one-hundredth of a micron.

  4. Unstained living cells can be studied with the help of a phase-contrast microscope.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An angstrom is 10^-10 meters, while a micron is 10^-6 meters. Therefore, an angstrom is 10^-4 of a micron, not one-hundredth. The other statements are standard biological/microscopy facts.

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

Which microscope is best to study cell division in functional state?

  1. EM

  2. SEM

  3. Phase contrast microscope

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

Phase contrast microscopy is particularly important in biology. It reveals many cellular structures that are not visible with a simpler bright field microscope. These structures were made visible to earlier microscopists by staining, but this required additional preparation and killed the cells. The phase contrast microscope made it possible for biologists to study living cells and how they proliferate through cell division. So, phase contrast microscope is best to study cell division in functional state compared to EM, SEM and simple microscope.

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

Separation of chromatids during metaphase and behaviour of chromosomes during mitotic and meiotic divisions can be best studied by

  1. Phase contrast microscope

  2. SEM

  3. X-ray microscope

  4. Cell-fractionation method
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phase contrast microscope has a phase plate and an annular diaphragm. They bring about changes in light rays passing through the specimen producing differences in light intensity. Denser parts alter path of light more than the thinner parts. This produces varying contrast for different regions. 

The microscope is useful in the study of small living organisms, living cells, constituents of living cells, effect of various factors over living structures, and study of various cellular events like behaviour of chromosomes during mitosis and meiosis, spindle formation, cytokinesis, pinocytosis, phagocytosis, cyclosis, glandular secretions, spermatogenesis, oogenesis etc.