Podcast
Questions and Answers
What is the purpose of normalizing CT numbers to the attenuation value of water?
What is the purpose of normalizing CT numbers to the attenuation value of water?
- To reduce radiation exposure
- To make the CT numbers easier to read
- To highlight air in the image
- To allow comparison of tissue densities (correct)
What term is used to represent tissue density in a CT image?
What term is used to represent tissue density in a CT image?
- CT numbers (correct)
- Voxels
- Pixels
- C-arm
What is the CT number of air on the Hounsfield unit (HU) scale?
What is the CT number of air on the Hounsfield unit (HU) scale?
- Zero
- -500
- -1000 (correct)
- 1000
What is the basic principle behind Cone Beam Computed Tomography (CBCT) imaging?
What is the basic principle behind Cone Beam Computed Tomography (CBCT) imaging?
Which of the following is an indication for Maxillofacial Multidetector Computed Tomography?
Which of the following is an indication for Maxillofacial Multidetector Computed Tomography?
What do CT numbers represent in a CT image?
What do CT numbers represent in a CT image?
What is the purpose of capturing multiple sequential planar projection images during rotation?
What is the purpose of capturing multiple sequential planar projection images during rotation?
How are basis images different from cephalometric radiographic images?
How are basis images different from cephalometric radiographic images?
What determines the number of images that constitute the projection data in CBCT imaging?
What determines the number of images that constitute the projection data in CBCT imaging?
Which component of image production involves stabilizing the patient and setting the X-ray generator parameters?
Which component of image production involves stabilizing the patient and setting the X-ray generator parameters?
In CBCT imaging, what remains constant for the X-ray source during image acquisition?
In CBCT imaging, what remains constant for the X-ray source during image acquisition?
What role does the detector frame rate play in determining the number of images in CBCT projection data?
What role does the detector frame rate play in determining the number of images in CBCT projection data?
What is one of the advantages of CBCT compared to CT?
What is one of the advantages of CBCT compared to CT?
Which feature of CBCT allows for real-time dimensional assessment and measurements?
Which feature of CBCT allows for real-time dimensional assessment and measurements?
What is one of the disadvantages of CBCT imaging mentioned in the text?
What is one of the disadvantages of CBCT imaging mentioned in the text?
Which aspect of CBCT allows for unique display modes in maxillofacial imaging?
Which aspect of CBCT allows for unique display modes in maxillofacial imaging?
What is one difference between CBCT and medical CT?
What is one difference between CBCT and medical CT?
Which publication compares maxillofacial CBCT and medical CT?
Which publication compares maxillofacial CBCT and medical CT?
What is the basic principle of Computed Tomography (CT) imaging technique?
What is the basic principle of Computed Tomography (CT) imaging technique?
What advantage of CT imaging eliminates the superimposition of images?
What advantage of CT imaging eliminates the superimposition of images?
Which generation of CT scanner uses a solitary x-ray pencil like beam and a solitary detector?
Which generation of CT scanner uses a solitary x-ray pencil like beam and a solitary detector?
What is the characteristic of the fan beam in Second Generation CT scanners?
What is the characteristic of the fan beam in Second Generation CT scanners?
Which feature makes CT a painless imaging technique?
Which feature makes CT a painless imaging technique?
What does the detector in CT scanners record during imaging?
What does the detector in CT scanners record during imaging?
What is the role of flat panel detectors (FPDs) in X-ray detection for CBCT imaging?
What is the role of flat panel detectors (FPDs) in X-ray detection for CBCT imaging?
What does the grayscale ability of CBCT imaging depend on?
What does the grayscale ability of CBCT imaging depend on?
How many shades of gray can current CBCT machines identify with their 12 bit detectors?
How many shades of gray can current CBCT machines identify with their 12 bit detectors?
What occurs during the secondary (multiplanar) reconstruction stage in CBCT imaging?
What occurs during the secondary (multiplanar) reconstruction stage in CBCT imaging?
What is the significance of voxel size in CBCT imaging?
What is the significance of voxel size in CBCT imaging?
In CBCT imaging, what is the process involved in dividing the volume into tiny cubes or voxels?
In CBCT imaging, what is the process involved in dividing the volume into tiny cubes or voxels?
