TSO X-Ray Image Interpretation 3

Question 1

On a dual-energy X-ray system, items with HIGH atomic numbers (Z-number) typically appear in which color?

Accepted Answer

Blue or green

Answer

Orange or amber

Answer

Red

Answer

Transparent

Question 2

A carry-on bag passes through X-ray and shows a cluster of small, bright white circular objects grouped together. The MOST likely concern is:

Accepted Answer

Ball bearings or metal projectiles that could be components of an IED

Answer

Decorative jewelry items

Answer

Vitamins or supplement capsules

Answer

Coins collected loosely at the bottom of the bag

Question 3

Why is it important for TSOs to vary their focus point and scan speed when viewing X-ray images?

Accepted Answer

To reduce visual fatigue and avoid missing items in peripheral areas of the image

Answer

To comply with TSA time quotas for bag processing

Answer

To allow the machine's software to recalibrate between bags

Answer

To ensure the conveyor belt speed matches the imaging rate

Question 4

Which of the following objects would appear MOST penetrable (darkest) on an X-ray image?

Accepted Answer

A foam pillow

Answer

A steel padlock

Answer

A glass bottle filled with water

Answer

A ceramic tile

Question 5

A bag contains what appears to be a book. However, the book's spine area shows a dense metallic line with small cylindrical objects. The TSO should:

Accepted Answer

Resolve the anomaly through additional screening because this pattern is consistent with a book-bomb configuration

Answer

Clear the bag since books are permitted items

Answer

Ask the passenger if the book is hardcover or paperback

Answer

Swab the exterior of the bag for explosive traces only

Question 6

What is the significance of the 'effective atomic number' (Zeff) provided by dual-energy X-ray systems?

Accepted Answer

It helps classify whether a substance is organic, inorganic, or metallic, aiding threat identification

Answer

It measures the exact weight of objects in the bag

Answer

It indicates the radiation dose delivered to the contents

Answer

It shows the manufacturer's safety rating for the X-ray machine

Question 7

A passenger's bag shows a large orange-amber blob obscuring a section of the image. What technique can the officer use to better evaluate what is underneath?

Accepted Answer

Use the organic-stripping or color-inversion feature to suppress the organic layer and reveal underlying items

Answer

Rotate the bag 180 degrees and re-scan

Answer

Manually move the organic item and re-scan the bag

Answer

Flag the bag for a physical search without further X-ray review