Amyotrophic lateral sclerosis (ALS), also known as Charcot’s disease, is a neurodegenerative disorder that primarily affects the motor neurons in the brain and spinal cord. It gradually leads to muscle weakness, atrophy, and, in advanced stages, a loss of mobility.

There is no single test to confirm ALS. However, medical imaging, especially magnetic resonance imaging (MRI), plays an important role in ruling out other possible causes and in better understanding the neurological involvement.

At Radimed, imaging exams are performed using state-of-the-art equipment, such as the GE Healthcare SIGNA Artist MRI scanner, which provides high-resolution images. These images are interpreted by specialized radiologists to support referring physicians in their diagnostic assessment.

Technology never replaces the human element—it supports it. We believe that a clear image is above all a tool for understanding and guidance in what can often be a complex healthcare journey.

Understanding Amyotrophic Lateral Sclerosis (ALS)

Diagnosing ALS can be a lengthy process because it is a diagnosis of exclusion. Physicians rely on the patient’s medical history, a comprehensive neurological examination, and various tests to rule out other conditions that may cause similar symptoms.

ALS is a progressive disease that leads to muscle weakness, atrophy, and, over time, paralysis. It affects about 2 to 5 people per 100,000 worldwide. Symptoms vary widely from person to person but often include:

  • difficulty speaking, swallowing, or breathing,
  • muscle cramps,
  • spasticity, and
  • gradual weakness in the limbs.

The Role of MRI in ALS evaluation

MRI does not directly diagnose ALS, but it helps exclude other neurological disorders that may mimic its symptoms, such as:

  • multiple sclerosis (MS),
  • brain or spinal cord tumors,
  • strokes (CVA), or
  • spinal cord injuries.

Brain MRI

Brain MRI provides a detailed view of the motor cortex and nerve pathways. In some advanced cases, motor cortex atrophy may be visible, but the primary purpose of this exam is to rule out other conditions.

Spinal MRI (Cervical, Thoracic, Lumbar)

Spinal MRI helps visualize the spinal cord to detect possible compressions, lesions, or abnormalities that may explain muscle weakness.

It is important to note that, while powerful, MRI has limitations in the early diagnosis of ALS. Imaging-visible changes are generally not present during the initial stages of the disease.

How Does an MRI Work?

Magnetic resonance imaging (MRI) is a non-invasive, painless, and radiation-free exam that provides highly detailed images of the brain, spinal cord, and other internal structures.

1. Before the Exam

Our team reviews your medical history, allergies, and previous imaging studies.
All metal objects (jewelry, watches, credit cards, etc.) must be removed because MRI uses a strong magnetic field.
In some cases, a contrast agent (gadolinium) may be injected to enhance visualization of certain structures. This agent is generally well tolerated.

2. During the Exam

You’ll lie comfortably on a motorized table that slides gently into the scanner.
The exam is safe but can produce loud, repetitive sounds due to the imaging technology. Earplugs or headphones are provided to reduce the noise.
It’s important to remain still during image acquisition to obtain the best results. The duration varies depending on the area being examined

3. After the Exam

No recovery period is needed—you can resume your usual activities right away.
If a contrast agent was used, we recommend staying well hydrated in the hours following the exam.

The images are then analyzed by our specialized radiologists, who prepare a detailed report that is quickly sent to your referring physician.

The Evolution of Imaging Technologies

Some advanced imaging techniques, such as magnetic resonance spectroscopy (MRS) or diffusion tensor imaging (DTI), are currently being explored in clinical research.
These methods aim to improve understanding of microscopic changes in the brain and spinal cord but are not yet used in routine clinical practice.

Radimed closely follows these scientific developments to integrate the most relevant technologies into diagnostic practice when they become clinically applicable.

In Summary

The diagnosis of ALS relies on a comprehensive clinical evaluation supported by high-quality imaging studies.
MRI plays a key role in excluding other conditions and in documenting the state of the nervous system.

At Radimed, imaging exams are performed in a safe, patient-centered environment, with a continuous focus on precision and comfort.
A medical referral is required for all imaging exams, in accordance with current clinical standards.

Schedule your appointment today or visit our website to learn more about our diagnostic imaging services.