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  1. Computed Tomography
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CT Registry Questions and Answers (Q&A)

How did slip ring technology make spiral CT a possibility?
M. Kennedy, Web Content Writer
Answered: Jun 28, 2018
The slip ring is known to be a device that will have the ability to turn stationary energy to kinetic energy. This will allow any rotating structure to work well. Based on the different choices...Read More

2 Answers

701 views
What is an advantage of scans of the pituitary taken in the coronal plane?
J. Shatner, Content writer
Answered: Sep 26, 2018
The pituitary gland is the master gland present in the brain. It has two sections, the anterior pituitary and the posterior pituitary. The anterior pituitary secretes 7 different hormones that...Read More

2 Answers

629 views
Which of the following statements regarding retrospective image reconstruction is false?
N. Kingsley, Writer
Answered: Nov 05, 2018
Retrospective image reconstruction is also known as CT reconstruction because CT stands for Computed Tomography. Tomographic reconstruction refers to the amount of projections needed for a...Read More

2 Answers

582 views
What is an advantage of scans of the pituitary taken in the coronal plane?
Slarti
Answered: Jul 31, 2017
Single-channel axial and helical CT of the pituitary gland is best performed in the direct coronal plane by maximally extending the patient's neck while the patient is either supine or prone....Read More

4 Answers

516 views
What does tube interscan delay time refer to in Computed Tomography(CT)?
John Smith
Answered: Apr 18, 2024
The time between the end of one scan and the start of the next scan during which the tube will cool

1 Answer

501 views
What is the component of the CT scanner responsible for the mathematical calculations of the image reconstruction?
John Smith
Answered: Apr 18, 2024
Array Processor
(d) The array processor is a specialized component of the CT computer system. It is capable of performing the massive calculations required for CT image reconstruction.

1 Answer

485 views
How can the intensity of the CT x-ray beam be increased?
M. Kennedy, Web Content Writer
Answered: May 07, 2019
Decreasing collimation. In X-ray beams, collimation is importing for image quality and patient dose during fluoroscopy and radiation projections. This process makes light rays parallel and...Read More

3 Answers

459 views
What increases the signal-to-noise ratio of a CT image?
John Smith
Answered: Apr 18, 2024
Increased aperture size

The signal to noise ratio of a CT image is increased when a larger amount of x-ray photons are absorbed by the detectors.

1 Answer

414 views
What is the major disadvantage of the fan shaped x-ray beams used in modern CT units when compared with pencil  thin beams?
John Smith
Answered: Apr 18, 2024
Increased patient dose

(b) The use of a fan shaped beam during CT imaging increases the total volume of tissue irradiated, thereby increasing the amount of scatter radiation produced.

1 Answer

410 views
Which physical phenomena does the term beam hardening describe?
E. Stanley, Technical writer
Answered: Aug 29, 2018
The answer to this is Beam hardening. Beam hardening is described as the x-ray beam passes through the item or the object that is being x-rayed. This means that the lower energy photons do not...Read More

2 Answers

359 views
What does the term viscosity refer to?
John Adney
Answered: Jul 10, 2017
Vis·cos·i·ty ËŒviˈskäsÉ™dÄ“/ noun the state of being thick, sticky, and semifluid in consistency, due to internal friction. synonyms:...Read More

3 Answers

324 views
What is an analytic form of image reconstruction?
John Smith
Answered: Apr 18, 2024
2 and 3 only
(c) The analytic methods of CT image reconstruction include the filtered back-projection and the Fourier transform method. These techniques are called analytic because they use...Read More

1 Answer

289 views
Why does CT scanning expose the patient to less radiation than a plain x-ray film?
Urboros
Answered: Oct 16, 2017
But even with the more collimation a chest x-ray is 2 imges and a ct chest is easily more.

Ct exposes the patient to more radiation just based on how it functions, combined with the...Read More

3 Answers

286 views
What does a Hounsfield value of +10 likely represent?
L. Brett, Sales Manager
Answered: May 29, 2019
Sir Godfrey Hounsfield founded the Hounsfield Scale. It measures radiodensity. It has to do with the radio waves of an electromagnetic spectrum and the X-ray of an electromagnetic spectrum....Read More

2 Answers

256 views

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