Approximately how much storage does a chest X-ray require?

Approximately how much storage does a chest X-ray require?

• A. 35 megabits
• B. 20 megabits
• C. 30 megabytes
• D. 20 megabytes

Answer: (D)

A chest X-ray stored digitally is a data-heavy image because it includes grayscale pixel data at a high resolution plus a lot of metadata in the file. A typical chest radiograph uses a 12–16 bit depth per pixel and a large image matrix, so the raw pixel data alone can be several megabytes. When you add the DICOM headers, patient and study information, and sometimes additional views or series in the same study, the total file size climbs into the tens of megabytes. So, around 20 megabytes is a reasonable rough estimate for the amount of storage a chest X-ray study might require, especially when not using aggressive compression. If compression is applied, the size would be smaller; if you have multiple views or a larger image matrix, it could be larger.

A chest X-ray stored digitally is a data-heavy image because it includes grayscale pixel data at a high resolution plus a lot of metadata in the file. A typical chest radiograph uses a 12–16 bit depth per pixel and a large image matrix, so the raw pixel data alone can be several megabytes. When you add the DICOM headers, patient and study information, and sometimes additional views or series in the same study, the total file size climbs into the tens of megabytes. So, around 20 megabytes is a reasonable rough estimate for the amount of storage a chest X-ray study might require, especially when not using aggressive compression. If compression is applied, the size would be smaller; if you have multiple views or a larger image matrix, it could be larger.