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Tomography 1

Physics of Image Production

QuestionAnswer
During conventional Tomography, structures lying outside the object plane are blurred because of what? Motion blur
Conventional tomography employs what principle? Motion blur
What is the MAJOR advantage of conventional tomography? Contrast resolution
Conventional tomography has also been called what? Laminography,Planigraphy,Stratigraphy
What will the IR do during conventional tomography? Move opposite the x-ray tube in a seesaw motion
What determines the thickness of tissue imaged during linear tomography? Tomographic angle
What is the thickness of tissue imaged during conventional tomography called? The tomographic layer
What would the tomographic angle be for Zonographic Tomography? Less than 10 degrees
When the tomographic angle is 0 degrees, the tomographic layer will be _________. Infinite
During conventional tomography, the fulcrum is in the ____ _____. Focal Plane
The tomographic angle is the angle of x-ray tube movement during what? x-ray exposure
The MAJOR disadvantage of conventional tomography is ________ ________ _______. Increased patient dose
Name the five types of multidirectional tomographic modes. Circular, Elliptical, Figure 8, Hypocycloidal and spiral(trispiral)
What is the relationship between tomographic angle and section thickness Large angle=Small Thickness; Small Angle=Large thickness
When the Grossman principle is used to alter the focal plane level, ________ remains stationary and ________ is raised or lowered Fulcrum, Table
When the planigraphic principle is used to alter the focal plane, the fulcrum system is ________. The _________ is raised or lowered while the ________ remains stationary. Adjustable, Fulcrum, Stationary
What are the essential ingredients for Linear Tomography? x-ray tube, movable bucky and rigid connecting rod which rotates about a fixed fulcrum
_______ is a special x-ray technique that ______out the _______ of superimposed structures to show clearly the principle structures being examined Tomography. blurs. shadows.
Tomography is also referred to as __________ ________ _____________. body section radiography
The plane of maximum focus in tomography is referred to as what? Object/Focal plane
How would you locate the tomographic scout level when performing an examination of the kidneys? measure patient, divide by 2 and subtract two.
Created by: aldo.banos