Can we see everything in a scanner?

Can we see everything in a scanner?

Can we see everything in a scanner?


A CT scan is a medical imaging tool that uses x-rays to create images of the inside of the body. Although CT imaging is very useful in diagnosing diseases, it cannot see every detail of the body.

The CT scan can reveal information about bones, organs and soft tissues, including lesions and abnormalities. However, some parts of the body are more difficult to image using a CT scan, such as the brain, soft tissues of the abdomen, and small blood vessels.


The scanner uses X-rays to create images, but some parts of the body may absorb more X-rays than others, making it difficult to visualize. For example, soft tissue is not as dense as bone and may appear blurry on a CT image. Additionally, it is possible that some image disturbances may appear due to the patient's breathing or movements.


A scanner can be used to view different parts of the body, including the head, chest, abdomen and limbs.


Radiologists and medical imaging technicians are the healthcare professionals who use the scanner to diagnose diseases and abnormalities.

Figures and examples

According to a study published in the journal Radiology, the CT scan can diagnose a wide variety of diseases, including bone fractures, tumors and brain injuries. However, CT imaging can also show false or erroneous results in approximately 30% of cases. Additionally, the cost of a scanner can range from a few hundred to several thousand dollars.

8 Similar questions/searches:

1. What are the advantages and disadvantages of a scanner?

The CT scan has advantages, such as the ability to visualize internal structures and diagnose diseases. However, it can also have disadvantages, such as radiation and difficulty visualizing certain tissues.

2. How does a scanner work?

A scanner uses x-rays to create images of the body's internal structures. The patient lies on a table, which moves through a tube-shaped ring. X-rays are emitted through the body, and detectors measure the amount of X-rays absorbed to create the image.

3. What are the alternatives to scanner?

Other medical imaging techniques, such as ultrasound and MRI, can also be used to visualize internal organs and diagnose diseases.

4. Why are some parts of the body more difficult to visualize in a CT scan?

Some tissues in the body can absorb more X-rays than others, making viewing more difficult. Additionally, patient movement can cause blurring in images.

5. Are the scanners safe?

Although exposure to x-rays can cause a health risk, modern scanners emit very low levels of radiation. However, it is important to take into account the cumulative radiation doses in a patient's life.

6. How is scanner data used to diagnose diseases?

Images from the scanner can be used to look for abnormalities in the body's internal structures and help diagnose diseases.

7. Can patients feel pain during a CT scan?

The scan itself does not cause pain, but some patients may feel claustrophobic or anxious throughout the process.

8. How long does it take to perform a CT scan?

The time required to complete a CT scan depends on the part of the body being scanned and the complexity of the exam. Most scans take between 10 and 30 minutes.

Sources consulted:
– Publication in the journal Radiology entitled “Performance of low-dose CT screening for lung cancer: computed tomography screening takes 1 or 2 years? », consulted in June 2023.
– Mayo Clinic website accessed June 2023.

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