BETA - What is a CT scan or a whole body low dose CT (WBLD-CT) scan? When are they used in myeloma diagnosis and monitoring?

This video explains the role of CT scans in multiple myeloma, including how they work, what they can detect, and how they compare to other imaging tools used throughout diagnosis, treatment, and monitoring.

The video begins by describing how CT (computed tomography) scans evolved beyond traditional X-rays to provide much more detailed and sensitive imaging of bone damage caused by myeloma. Unlike standard X-rays, CT scans create thin cross-sectional images of the body that can be reconstructed into detailed views of both bones and soft tissues, making them far more effective at detecting subtle lytic lesions and other abnormalities.

It also introduces the whole-body low-dose CT scan (WB-LDCT), an imaging method commonly recommended in myeloma because it provides a head-to-toe assessment of bone involvement while using significantly less radiation than a conventional CT scan. The video explains how WB-LDCT compares to low-dose CT scans used in lung cancer screening and emphasizes that advanced imaging—whether CT, PET/CT, or MRI—is now preferred over traditional skeletal surveys.

In addition, the video covers practical questions patients often have, including whether claustrophobia is an issue during CT scans, when contrast dye is used, and how to prepare for imaging appointments. It explains that CT scans for myeloma usually do not require contrast due to concerns about kidney function, while PET/CT scans require additional preparation such as fasting beforehand.

The video also highlights the difference between CT scans and PET/CT scans. CT imaging shows detailed anatomy and bone structure, while PET scans reveal areas of increased metabolic activity that may indicate active myeloma. When combined, PET/CT scans provide both structural and functional information, helping physicians identify active disease more precisely.

Finally, the video discusses radiation exposure and reassures patients that imaging schedules in myeloma are generally spaced out enough that radiation risk is usually low, especially with low-dose techniques. Overall, the video emphasizes that CT scans are a critical and highly sensitive tool for detecting bone disease, monitoring progression, and guiding treatment decisions in multiple myeloma.