Radiographer

Radiographer Interview Questions and Answers for Freshers

Updated 2 Mar 2025
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Q1. What is the basic principle of a CT scan?

Ans.

CT scan uses X-rays to create detailed cross-sectional images of the body.

  • CT scan stands for computed tomography scan

  • It uses a rotating X-ray machine to capture multiple images from different angles

  • The images are processed by a computer to create detailed cross-sectional images of the body

  • CT scans are commonly used to diagnose conditions such as tumors, fractures, and internal injuries

Q2. What do you know about radiology

Ans.

Radiology is a branch of medicine that uses imaging technology to diagnose and treat diseases and injuries.

  • Radiology involves the use of various imaging techniques such as X-rays, CT scans, MRI, and ultrasound.

  • Radiographers are trained professionals who operate imaging equipment and work closely with radiologists to interpret images.

  • Radiology plays a crucial role in diagnosing conditions such as fractures, tumors, and internal injuries.

  • Advancements in radiology technology hav...read more

Q3. Define the term ALARA in medical imaging ?

Ans.

ALARA stands for As Low As Reasonably Achievable, a principle in medical imaging to minimize radiation exposure to patients and staff.

  • ALARA is a radiation safety principle used in medical imaging to minimize radiation exposure to patients and staff.

  • It involves using the lowest possible radiation dose necessary to produce high-quality images for accurate diagnosis.

  • Techniques such as collimation, shielding, and proper positioning are used to adhere to ALARA principles.

  • Regularly...read more

Q4. Describe about Triphasic Abdomen study.

Ans.

Triphasic Abdomen study is a specialized imaging technique used to evaluate the blood flow in the liver and surrounding organs.

  • It involves three phases: arterial, portal venous, and delayed phases.

  • The arterial phase captures the early arterial blood supply to the liver, showing enhancement of lesions like hepatocellular carcinoma.

  • The portal venous phase highlights the portal vein and hepatic veins, aiding in the detection of liver metastases.

  • The delayed phase provides additio...read more

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Q5. What is CT number ?

Ans.

CT number is a quantitative measurement used in computed tomography (CT) imaging to represent the radiodensity of tissues.

  • CT number is a unitless value assigned to each pixel in a CT image, representing the attenuation of X-rays by the tissue at that location.

  • It is calculated based on the linear attenuation coefficient of the tissue and the attenuation of the X-ray beam.

  • CT number is used to differentiate between different tissues based on their radiodensity, helping in diagno...read more

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