FREE Computed Tomography Trivia Questions and Answers
Which of the following technical aspects directly affects the dose given to patients?
The milliampere-second (mAs) setting is a technical factor that directly affects patient dose during medical imaging procedures.
Which of the following signs may a patient in shock display?
A patient in shock may exhibit all of the following symptoms:
1. Tachycardia - rapid heart rate: The heart rate increases to maintain blood pressure and circulation.
2. Rapid, shallow breathing: The body tries to compensate for decreased oxygen delivery by increasing the respiratory rate.
3. Cyanosis- discoloured skin {bluish}: The skin and mucous membranes may appear bluish due to decreased oxygen delivery.
Other symptoms that may be present in a patient in shock include low blood pressure, cold and clammy skin, confusion, and reduced urine output. These symptoms can vary depending on the cause and severity of the shock. It's important for medical professionals to recognize and quickly address the signs of shock, as it is a life-threatening condition that requires immediate medical attention.
The patient should be questioned about the following matters before receiving an intravenous injection of iodinated contrast material:
1. Renal Function- One kidney dose is cut
2. Allergic History- Premedicated
3. Cardiac History- Heart disease
Who is credited with the invention of Computed Tomography (CT)?
Godfrey Hounsfield, an English electrical engineer, is credited with the invention of the CT scanner. He shared the Nobel Prize in Physiology or Medicine in 1979 for this contribution.
Which type of contrast agent is commonly used in CT scans to enhance blood vessels and soft tissues?
Iodine-based contrast agents are frequently used in CT imaging to enhance visualization of blood vessels and soft tissues due to their ability to absorb X-rays.
For an adult, the usual range of respiration is
The normal range of respiration for an adult is 12-20 breaths per minute, with the average being around 16 breaths per minute. However, it's important to note that this range can vary depending on age, health, and activity level. It's always a good idea to consult a medical professional with concerns about your breathing or respiratory rate.
Which type of CT imaging provides real-time assessment of tissue perfusion and blood flow?
Perfusion CT is a technique used to assess tissue perfusion and blood flow by tracking the passage of contrast material through blood vessels during a CT scan.
What is the purpose of "windowing" in CT image display?
Windowing is a technique used to adjust the range of brightness and contrast levels in CT images, optimizing visualization of different tissue densities.
Which of the following signs may a patient in shock display? Which infection control measures are necessary at the site of an intravenous injection of iodinated contrast media?
Which part of a CT scanner rotates around the patient during the scan?
The gantry is the part of the CT scanner that houses the X-ray tube and the detector array. It rotates around the patient during the imaging process.
What is the primary advantage of helical (spiral) CT scans over conventional CT scans?
Helical (spiral) CT scans allow for continuous image acquisition, resulting in reduced radiation dose compared to conventional step-and-shoot CT scans.
Iodinated contrast material is frequently injected intravenously at the following sites:
All of the above veins can be common sites for the intravenous injection of iodinated contrast media, depending on the patient's anatomy and the healthcare provider's preference.
What is the typical unit of measurement used for the density of tissues in CT scans?
Hounsfield Units (HU) are used to quantify the density of tissues in CT images. Water is assigned a value of 0 HU, and other substances are assigned values relative to that.
What does the term "slice increment" refer to in CT imaging?
Slice increment in CT imaging refers to the gap or interval between consecutive image slices. It affects the level of overlap between slices and can impact image reconstruction.
Which type of CT scan is specifically designed for imaging the coronary arteries and heart structures?
Cardiac CT is a specialized type of CT scan used for imaging the coronary arteries and assessing heart structures.
A patient having a history of an allergic reaction to iodinated contrast media may undergo the following procedures in advance of a contrast-enhanced CT scan:
If a patient has an initial allergic reaction to iodinated contrast media, preparing for a contrast-enhanced CT exam may include premedication with steroids and antihistamines. This reduces the risk of an allergic response during the exam. The specific medications and dosages used may vary depending on the patient's medical history and the severity of their initial reaction. The patient needs to inform their healthcare provider about any prior allergic reactions or medical conditions before undergoing any medical imaging procedure.