Tomography #1 Flashcards
(24 cards)
During conventional Tomography, the image receptor will?
Move opposite the x-ray tube in a seesaw motion
During conventional Tomography, structures lying outside the object plane are blurred because of which of the following?
Motion blur
Which of the following is a multidirectional tomographic mode?I. Trispiral II. Elliptical III. Hypocycloidal IV. Linear
I, II, and III
Conventional tomography employs which of the following principles?
Motion blur
During conventional tomography, the fulcrum is in the?
Focal plane
When the tomographic angle is 0 degrees, the tomographic layer will be?
Infinite
To obtain a tomographic layer of 1mm, the tomographic angle should be?
50 degrees
Which of the following is the MAJOR disadvantage of conventional tomography?
Patient dose
The MAJOR advantage of conventional tomography is better?
Contrast resolution
The thickness of tissue imaged during conventional tomography is called which of the following?
The tomographic layer
The thickness of tissue imaged during linear tomography is determined by which of the following?
Tomographic angle
Which of the following tomographic angles would be considered for use in zonography?
5 degrees
Conventional tomography has also been called which of the following?
Laminography
The tomographic angle is the angle of x-ray tube movement during which of the following?
X-ray exposure
Conventional tomography has also been called what?
Laminography,Planigraphy,Stratigraphy
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, Patient
What are the essential ingredients for Linear Tomography?
X-ray tube, movable bucky and rigid connecting rod which rotates about a fixed fulcrum
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 (Sharpest) 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.
