Image Acquisition

Question 1

RWS (review workstation)

Answer 1

-advanced post processing features
-digital reading room darker than film reading rood
-digital= illuminance 20-45 LUX (viewing conditions under QC)

Question 2

Mammography monitors review workstation (RWS)

Answer 2

MQSA minimum is 5 megapixel monitors

Question 3

How are prior images retrieved?

Answer 3

• manually retrieved
• prefetch: triggered by schedule, usually night before
  -autofetch: triggered by first image arriving into PACS on day of exam

Question 4

Marking ROI on RWS

Answer 4

-can be stored as an overlay on original image (not suggested)
-may be stored as secondary capture (SC) or screenshot (preferred). lower quality image with marking

Question 5

When a pt schedules an exam, where is her information entered into?

Answer 5

HIS (hospital information system) or RIS (radiology information system)

Question 6

What is pts information converted into?

Answer 6

HL7 (health level seven) computer language

Question 7

What does HIS manage?

Answer 7

the information related to health care and manages data from ALL departments (medical, legal, admin, financial)

Question 8

What does RIS manage?

Answer 8

the radiology department and its specific modalities

Question 9

DICOM (digital imaging and communications in medicine)

Answer 9

used to share radiology images and data b/w different systems made by different manufacturers

Question 10

PACS (picture archiving and communication system)

Answer 10

-medical imaging technology used in healthcare organizations to securely store, retrieve, and transmit electronic images and reports from multiple modalities
-medical language for PACS is DICOM

Question 11

Cloud storage (cloud PACS)

Answer 11

-offsite server
-backup to traditional PACS: authorized users can have access to images anytime anywhere (imaged available for 30 days)

Question 12

EMR (electronic medical record)
EHR (electronic health record)

Answer 12

-digital version of paper chart that contains patient’s medical history from one practice
-ability to share this info across other health org.

Question 13

image/data compression

Answer 13

-data stored in smaller package
-req. less space & less money to store
-allows images to move faster over network

Question 14

Lossy data compression

Answer 14

-greater degree of compression
-req. less space
-30:1 ratio
-some data loss upon retrieval
-not allowed for FFDM

Question 15

Lossless data compression

Answer 15

-2:1 ratio
-only format for FFDM
-not insignificant in terms of saved space
-no data loss