The HU for Metal is

Study for the Image Modalities Test. Learn with flashcards and multiple choice questions, each comes with hints and explanations. Get ready for your credentialing exam in the field of medical imaging!

Multiple Choice

The HU for Metal is

Explanation:
In CT imaging, Hounsfield units quantify how much a material attenuates X-rays relative to water. Water is defined as 0 HU, air is about -1000 HU, and bone is around +1000 HU. Metals attenuate X-rays far more than bone because they are denser and have higher atomic numbers, so they yield very high HU values. This places metals in the thousands on the HU scale, typically in the +2000 to +4000 range, though exact values depend on the specific metal and the scan energy. That’s why the range +2000 to +4000 is the best match for metal.

In CT imaging, Hounsfield units quantify how much a material attenuates X-rays relative to water. Water is defined as 0 HU, air is about -1000 HU, and bone is around +1000 HU. Metals attenuate X-rays far more than bone because they are denser and have higher atomic numbers, so they yield very high HU values. This places metals in the thousands on the HU scale, typically in the +2000 to +4000 range, though exact values depend on the specific metal and the scan energy. That’s why the range +2000 to +4000 is the best match for metal.

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