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SUMMER 2018-RADI 103-WEEK2
Terms in this set (36)
Using different colored cables and good cable management makes the PACS server rack pretty and easy to maintain.
PACS will need an inbound and outbound open port in the hospital network firewall to import and export images from other facilities.
All PACS systems have the exact same network architecture.
A DICOM SOP class is determined by the SCU and SCP.
Where is the PACS database server generally located?
In a rack in the data center with the other PACS servers.
NOC stands for?
NETWORK OPERATIONS CLOSET
What common monitor calibration program would need to connect to a server outside the hospital network?
The modalities in the Radiology dept. connect to the Radiology dept. switch. What connects the Radiology dept. switch to the PACS data center switch?
A TRUNK CABLE
If you were building the HGH PACS system would you plug all the servers into a single switch at the top of the rack? Is this a single point of failure that could take down the PACS system?
Yes this is a single point of failure, it would be a good idea to have a second switch on the rack.
The PACS acquisition gateway server is often called a DICOM server in the real world.
The PACS acquisition gateway optimizes image quality before storing the images in PACS.
Each modality should send to a single DICOM server.
The definition of PACS acquisition rate is?
The rate at which studies are received from the various modalities measured over a specific period of time.
The most common preprocessing function performed by the DICOM server is?
adjusts image orientation
If there is a discrepancy between how the image looks at the tech review station and how it looks on PACS the most likely cause is?
The difference in monitor quality and calibration
In figure 10.2 the acquisition gateway sits between what two components of the data flow?
web server and pacs workstation
In a DICOM and IHE compliant system what DICOM service is used to transmit the images?
In a DICOM compliant system what role does the imaging device take on when sending to the PACS acquistion gateway?
In a DICOM compliant system what role does the DICOM server take on when recieving images from the modality?
scp -service provider
If the SCU = CT and the SCP = image acquisition gateway in a DICOM and IHE compliant system what is the SOP class for their transaction?
CT Image Get
What are the three primary tasks of the image acquisition gateway?
Acquire images from the modalities.,Convert the modality specific data to PACS specific data.,Sends the images to the appropriate PACS storage location.
What are the four characteristics of PACS image acquisition gateway?
preserves the image data integrityits operation is transparent and automaticdelivers images in a timely manner to PACS storageperforms some image preprocesing functions
IF SCU = NM AND SCP = PACS DICOM SERVER
NM IMAGE STORE
SCP = PACS DICOM server
NM Image Store
If your facilities peak volume is 300 studies per hour and your PACS vendor tells you the maximum throughput of a DICOM server is 60 studies per hour how many DICOM servers should you have?
according to the math but every DICOM server should have a backup so the correct answer is 6.
All CT scanners generate about the same data volume regardless of what hospital or dept they are located in.
When designing acquisition gateway data generation workflow it is a good idea to connect a few high and low volume modalities to each gateway. This yields a more even flow across all the gateways.
By calculating the DICOM server total data generation volume based on the peak volume hour the actual volume over 24 hours will be less.
The amount of data stored in the PACS archive increases every day.
When the archive fills up PACS will IMMEDIATELY crash.
Data Generation refers to
How much data is being imported and stored through the acquisition gateway
How do you calculate the total volume of data generation across an acquisition gateway for all the modalities that send to it?
sum the peak volume numbers for each modality that sends to that acquisition gateway
What modality has the largest image file size?
How do you calculate how much data is being archived without using a dashboard?
sum the total volume of all acquistion gateways
What three things do you need to know to calculate the data generation volume of an acquisition gateway for a single modality?
Average image size per modality, average number of images for each study, how many images each modality sends during the peak hour
What PACS components provide some image data storage after the Archive fills up?
DICOM Server, NAS
THIS SET IS OFTEN IN FOLDERS WITH...
SUMMER 2018-RADI 103-WEEK1
SUMMER 2018-RADI 103-WEEK3
SUMMER 2018-RADI 103 -WEEK4
SUMMER 2018-RADI 103-WEEK5
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