RADT 1030 Chapter 1 Questions and
Answers Graded A+
What is the primary purpose of radiology in medicine?
✔✔Radiology is used to diagnose and monitor medical conditions by producing images of the
inside of the body using various techniques like X-rays, CT scans, MRIs, and ultrasounds.
What are the common types of imaging techniques used in radiology?
✔✔The most common imaging techniques include X-rays, CT (computed tomography) scans,
MRI (magnetic resonance imaging), ultrasound, and nuclear medicine scans.
How does an MRI work?
✔✔MRI works by using strong magnetic fields and radio waves to create detailed images of
organs and tissues inside the body, without the use of ionizing radiation.
What is the difference between CT scans and X-rays?
✔✔CT scans provide cross-sectional images of the body and can offer more detailed information
compared to standard X-rays, which produce flat, two-dimensional images.
1
,What is an ultrasound and when is it used in radiology?
✔✔Ultrasound uses high-frequency sound waves to create images of the inside of the body,
commonly used for viewing soft tissues like the heart, muscles, and organs, as well as
monitoring pregnancies.
Why are radiology technicians important in healthcare?
✔✔Radiology technicians are responsible for operating imaging equipment, ensuring patient
safety, preparing patients for procedures, and assisting doctors in interpreting results for accurate
diagnoses.
What is the role of contrast agents in radiology?
✔✔Contrast agents are substances used to enhance the visibility of specific areas in imaging
tests, making it easier for doctors to detect abnormalities in organs or blood vessels.
What safety precautions should be followed in radiology?
✔✔Radiology professionals must ensure proper shielding to minimize radiation exposure to both
patients and staff, follow safety protocols, and use the lowest possible radiation doses for
necessary imaging.
2
,What is the principle behind X-ray imaging?
✔✔X-ray imaging works by passing X-rays through the body, which are absorbed differently by
various tissues, creating an image based on the varying densities of tissues like bones, muscles,
and organs.
What is the significance of mammography in radiology?
✔✔Mammography is an X-ray imaging technique specifically used to examine breast tissue for
signs of abnormalities, including tumors or calcifications, to aid in the early detection of breast
cancer.
How does a PET scan work and what does it show?
✔✔A PET (positron emission tomography) scan uses radioactive tracers to observe metabolic
activity in the body, helping doctors identify cancer, heart disease, and brain conditions by
detecting abnormal cell activity.
What is the purpose of radiology in emergency care?
✔✔Radiology plays a crucial role in emergency care by providing quick and accurate imaging to
assess injuries, detect fractures, bleeding, or internal damage, and guide treatment decisions.
3
, What is the difference between a radiologist and a radiologic technologist?
✔✔A radiologist is a medical doctor who interprets medical images and diagnoses conditions,
while a radiologic technologist operates the imaging equipment and assists in the process of
obtaining images.
How is radiation dose measured in radiology?
✔✔Radiation dose is commonly measured in units such as millisieverts (mSv) or grays (Gy),
depending on the type of radiation and the method used, to ensure patient safety during imaging
procedures.
What is fluoroscopy used for in radiology?
✔✔Fluoroscopy is a continuous X-ray imaging technique that allows real-time visualization of
moving body structures, often used during surgeries, biopsies, or to guide the placement of
medical devices.
What is the significance of radiology in cancer treatment?
✔✔Radiology aids in cancer treatment by helping in the diagnosis, staging, and monitoring of
cancer, as well as guiding radiation therapy and minimally invasive procedures like biopsy and
tumor ablation.
4
