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# Computer Storage

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1. Commonly, medical digital radiology ultrasound studies consist of about 25 images that are extracted from a full-motion ultrasound examination. Each image consists of 512 x 512 pixels. Each pixel is represented by an 8-bit scale for intensity.
A. How many bits are there in 25 of these frames, or images?

B. Ideally, doctors would utilize these 512 x 512 x 8 bit frames at a transmission rate of 30 frames per second. How many bits would be sent in 1 second at this rate?

C. We have a complete study that consists of 25 seconds of frames (remember that they are sent at a rate of 30 frames/second). We want to store these studies on a CD-ROM. If we have 600 MB of storage space available on the CD-ROM, how many of these studies will fit on the disk?

2. An 8 x8 data matrix has been received as shown below. The parallel parity bits are shown, assuming EVEN parity. Determine if any errors are present, and IF POSSIBLE, correct them.,

1 0 1 1 0 1 0 0 0

0 1 0 1 1 1 1 0 1

1 0 0 0 0 1 1 0 1

0 0 0 0 1 0 0 0 0

1 0 1 0 1 0 1 0 0

0 1 1 0 0 0 1 0 1

1 0 1 0 0 1 1 1 1

0 0 0 1 1 0 0 1 1

0 0 0 1 1 0 1 0

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#### Solution Preview

1. Commonly, medical digital radiology ultrasound studies consist of about 25 images that are extracted from a full-motion ultrasound examination. Each image consists of 512 x 512 pixels. Each pixel is represented by an 8-bit scale for intensity.
A. How many bits are there in 25 of these frames, or images?

Solution: There are a total of

It will be composed of:

The total number of bits in 25 images is:

B. Ideally, doctors would utilize these 512 x 512 x 8 bit frames at a transmission rate ...

#### Solution Summary

This posting contains the solution to the given problems.

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