Archive Storage Calculator

How much storage a PACS archive needs for what your modalities send, kept as long as you keep it.

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What the modalities send

One row per kind of study. Sizes start at a typical study as sent, with the range real scanners fall in beneath; change them to match your own equipment, or work one out below. Retention starts at 8 years - set each row to your records policy, since children's and screening imaging is often kept much longer.

Modality	Devices	Studies a day, each	Days a week	Study size (MB)	Sent compressed	Kept (years)	Stored a year	Remove

Add a modality

The archive

Planning horizon (years) Growth in studies (% a year) Busiest transfer window (hours)

Compression on storage

Stored as Ratio (to 1)

Where it is stored

Stored on

Copies kept RAID and filesystem overhead (%) Fill disk to no more than (%)

What it needs

Added in the first year

Work out a study size

From the images a study holds, or from a video's length and bitrate. Bits allocated is what is stored: 12-bit CT and MR still take 16 bits a pixel on disk.

From

Images in the study Frames each Rows Columns Bits allocated Colour

Use for

What this assumes

Sizing a Nexus archive?

Nexus can run as your PACS archive on local disk or in front of a DICOMweb store. Send us the summary above and we will go through the figures with you.

Talk to us about sizing