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 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 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 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

What is the proper term for a tumor when cancer spreads?

  1. metastasic

  2. benign

  3. carcinogenic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When cancer cells break away from the original tumor and travel through the blood or lymphatic system to form new tumors in other parts of the body, the resulting tumor is called metastatic (spelled 'metastasic' in the options). Benign tumors do not spread, and carcinogenic refers to substances that cause cancer.

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

Which of the following electromagnetic waves is used in medicine to destroy cancer cell?

  1. IR- rays

  2. Visible rays

  3. Gamma rays

  4. Ultraviolet rays
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Gamma rays are dominantly used in medicines to destroy the cells that are cancer affected. The gamma rays are chosen such that its energy does not harm the healthy cells.

Therefore, the rays used in medicine to destroy cancer cells are Gamma rays.