Terms

Question 1

Catharsis

Answer 1

•bowel cleansing

Question 2

Claudication

Answer 2

•cramping pain in the legs due to poor circulation

Question 3

Cystogram

Answer 3

•administration of an iodine contrast agent directly into the bladder via Foley catheter

Question 4

Interpolation

Answer 4

•mathematical process allowing reconstructions of a thin motion free image

Question 5

Full width at half maximum FWHM illustrates

Answer 5

•spatial resolution of a Ct scanner

Question 6

PACS

Answer 6

•responsible for storing, retrieving, distributing,and displaying medical imaging

Question 7

Isotropic

Answer 7

•voxel with equal dimension along X,Y,Z

Question 8

Array processor

Answer 8

•raw data is reconstructed

Question 9

Misregistration

Answer 9

•artifact that occurs with pt inconsistent breathing resulting in the loss of anatomic information

Question 10

DICOM

Answer 10

•process of recording, storing, printing, and transmitting medical image data

Question 11

Orthogonal planes

Answer 11

•angles perpendicular to the original plane

Question 12

Ray sum

Answer 12

•the measurement of transmitted radiation made by an individual detector

Question 13

Epinephrine used for

Answer 13

•bronchodilator

Question 14

Diphenhydramine used for

Answer 14

•(Benadryl) reduces allergic reactions

Question 15

Atropine used for

Answer 15

•to combat bradycardia (slow heart rate) during reaction to contrast

Question 16

Extravasation

Answer 16

•contrast escape into the subcutaneous tissue

Question 17

Lisfranic joint

Answer 17

•articulation between the tarsals and metatarsal

Question 18

Photon fluence

Answer 18

•quantity of radiation passing through a patient

Question 19

Section interval

Answer 19

•the spacing between two adjacent CT images

Question 20

Temporal resolution

Answer 20

•ability of an MSCT system to freeze motion and provide a blur free image

Question 21

The reduction in intensity of an X-ray beam as it interacts with matter

Answer 21

•attenuation

Question 22

Orthogonal

Answer 22

•define pixel and voxel

Question 23

SFOV

Answer 23

• scan field of view
• area of interest selected by the CT technologist before the scan begins
• if anatomy falls outside this box it won’t be recorded

Question 24

DFOV

Answer 24

• display field of view
• “the reconstruction field of view”
• can be equal or less than the scan field of view

Question 25

ROI

Answer 25

* region of interest | * circle used to obtain a CT number

Question 26

Compton effect

Answer 26

* interaction between X-ray and matter | * the X-ray knocks out an outer shell electron causing a deflected X-ray and deflected scatter

Question 27

PT

Answer 27

* prothrombin time | * measures how long it takes for blood to clot

Question 28

PTT

Answer 28

* partial thromboplastin time | * measure the time it takes for blood to clot

Question 29

MSAD

Answer 29

* multiple scan average dose | * the amount of exposure a pt receives from a series of CT scans

Question 30

Nitroglycerin

Answer 30

•a vasodilator given by sublingual

Question 31

Albuterol inhaler

Answer 31

•relieves bronchospasm

Question 32

DLP

Answer 32

* Dose Length Product | * measures the total exposure pt receives for the entire scan

Question 33

Equilibrium phase

Answer 33

* 5 or so min delay of the liver | * contrast enhancement is at its lowest