Patient Portal


“We are updating the website to improve the patient experience and expand our online services, so some services are temporarily disabled”

Patient Portal

The management and staff of ERESA Grupo Médico want to welcome you and are at your service. For your benefit and that of other patients, we request your collaboration and the compliance of all the rules. At our centres we serve clients of Insurance Companies, Mutual Insurance Companies, Collaborating Companies of Social Security,  agreements with Public Healthcare services and any individual person that comes to our facilities.

We offer the following services:

Diagnostic Imaging:

  • Magnetic Resonance
  • CT scan, standard Radiology
  • Mammography
  • Ultrasound scan
  • Advanced studies of cardiac pathology.

Nuclear Medicine:

  • PET-CT scan
  • Studies of Sentinel Lymph Node
  • Radiation Oncology.


  • Conventional
  • Mammography
  • MRI
  • CT scan
  • Cardiac MRI
  • ECO
  • Reports on special MRI scans
  • Second opinion reports.

You must provide the following documentation when you come to the centre:

  • National Identity Document (DNI), your Insurance Card, medical report from your mutual insurance company and /or the book of vouchers for medical assistance. Information about your illness (if any). The fully completed physician order. Authorization from the insurance company or the medical report.

ERESA Grupo Médico group is not responsible for lost or misplaced objects in its facilities.

What is a Magnetic Resonance?

Magnetic resonance imaging (MR or MRI) is a scan that allows us to study the internal organs of the human body. The system is based on the resonance of radio waves on the human body, subjected to a strong magnetic field, producing radio signals that allow computers to reconstruct images of internal structures of the body. It is a tunnel-shaped device with an examination table for the patient to lay. MRI does not use ionizing radiation (X-rays).

Is Medication used?

In some cases during scanning, it will be necessary to inject a contrast agent  in one of the patients veins. Sedation is sometimes needed for small children for them to remain completely still during the scan. This sedation can be administered to very young children either by mouth or by injecting a vein.

What will happen during the scan?

After undressing, the patient will be taken to the scanning room where they will be placed on the examination table. A venous catheterization will be performed if a contrast agent or intravenous sedation is required.

Throughout the scan, patients requiring sedation are controlled by a heart rate monitor and pulse oximetry. The scan begins once the patient is introduced into the tunnel of the scanner. The noise of the magnetic field gradient pulse will be heard during the scan. It is important that the patient be completely still to obtain optimal images. The complete scan will take about 30 to 45 minutes. If the patient has received sedation, they will be monitored until they awake. Afterwards, the patient can get dressed and return to their normal activities.

When will the results be available?

The scan and radiology report will be sent to your physician. It will be available for them on the same day of the consultation.

How Should the Patient Prepare for the Scan?

In tests without contrast or sedation, there is no need for them to arrive in a fasted state. For that reason, it is important for them to confirm whether sedation or intravenous contrast will be required for the test. For the patient-child under 1 year of age, they must not eat 3 hours prior to the scan. Older children must be 6 hours in a fasted state.

Generally, no other special preparation is needed. If necessary, specific written or oral instructions would be given along with the appointment.

Are There Any Contraindications?

If the patient has a prior history of reactions to medications, allergies, asthma, has any serious diseases, or is carrying any prosthesis or other metal object; report it to the nurse who will take care of them.

Before the scan, the radiology service staff inquire about your records and if you carry any object that can contraindicate the MRI. Cardiac pacemakers, for example, should not be subject to a magnetic field as powerful as a Magnetic Resonance, albeit some latest ones are compatible. Other metal prostheses can produce artefacts. It is important that this information is mentioned to the radiologist and radiology staff before entering the room.


They are compounds that allow us to study the morphology and functioning of the organs. They join the organs and release a small amount of radiation that is detected by devices called gamma cameras.

This radioactive signal is amplified and later converted into an electric signal that is analysed by a computer and shown as an image, in a gray-scale or in colour, the intensity of which is proportional to the energy received. This way we can study the radiopharmaceutical arrival to the organ, its distribution and later its elimination.


It depends on the test requested. It usually lasts between 30 to 60 minutes. There are some tests that require several scans throughout the day and others on separate days. We will let you know if more than one scan is required.

The waiting period will depend on the specific scan. Not all patients have the same waiting time, so at times you will pass before patients who arrived later.


Not at all. You will be injected the necessary dose of the product by intravenous injection (like a blood draw). This will have no side effects nor will it prevent you from doing your normal activities. The only negative aspect is that during the scan you must lie completely still.


NOT generally; but if so, you will be properly notified. If you are taking any type of medication you must notify it. There may be a chance you have to quit taking it.


It may be suitable to drink more water or juice than normally to facilitate the elimination of the injected agent. You should urinate frequently to help  eliminate the substance. In general, you will not need to have any additional care.


The irradiation that you will receive from a Nuclear Medicine scan is very small, and even less than that received in a traditional X-ray examination.

Considering  the characteristics of the products used, the probability of adverse side effects is extremely rare.


Yes, but you should not come with small children or pregnant women.


After performing a Nuclear Medicine scan, its convenient not to be near (holding in arms or sitting on knees) young children during the rest of the day.


You should not have any radiation scan performed. Please tell us if you are pregnant or think you may be pregnant. (Have you missed a period?). If so, it is important you notify us before we give you any injection.


If you are breastfeeding, tell us before we give you any injection. There are substances that are excreted through breast milk and may be harmful to the infant.

What Is A CT or Scanner?

The scanner is a complex machine that consists of a flat table, on which the patient lies and a “gantry”, where there is a special X-ray tube that rotates at high speed. It allows us to acquire information of the patients entire volume.

Its a radiology test that is also known as a computed tomography or CT Scan. The test is performed in a device that is located in the Radiology Diagnostic Services at Hospitals. The procedure is based on the use of X-rays and powerful computers to get internal images of the patient and detect whether they are suffering from any illness.

Is A CT Better than A Conventional X-Ray?

Its neither better nor worse; each test is indicated for the different diseases that the doctor wants to study. The greatest advantage of a CT scan is the ability to visualize body parts that otherwise would be impossible to study; modern CT scanners can achieve this in a very precise manner enabling early diagnosis.

Is the test uncomfortable or painful?

Its an absolutely painless test. The patient has to lie down completely still on a stretcher that is in motion during the examination; they will be told when to hold their breath.

Is it a dangerous test?

The risks are related to the use of ionizing radiations and iodinated contrast agents, although the use of contrast is not necessary in all cases. These risks are low and, if carried out for medical reasons, provide more benefits than disadvantages for the patient.

Who can have it done?

Any patient can have a scan performed, provided their physician needs this study to learn about their illness or its evolution.

In children, since they are more sensitive to the harmful effects of X-rays, its recommendation must be indicated by the Paediatrician.

Testing in pregnant women will be conducted only if strictly necessary, in order to not cause damage to the foetus.

In women of childbearing age, if the study is not urgent, it must be confirmed that the patient is not pregnant before testing.

What Preparation Is Needed?

If the study is to be performed with contrast, you must not eat in the last 6 hours, although you can drink fluids moderately up until an hour before the study.

Is Any Medication Administered?

For the assurance of a more precise examination, in most TC scans it will be necessary to inject a vein in the arm with a “contrast” (dye). In isolated cases, this substance can cause mild allergic reactions, but in some rare cases they can be very serious. Make sure to always check beforehand that you can be injected with a contrast agent. In some cases, we may ask for an informed consent.

If there is a history of any type of allergic reaction, the doctor requesting the test and the radiologist must be informed of this condition. Upon arrival at the Radiology Department, if the examination is abdominal, you will be given a liquid to drink that will help visualise the intestine better.

How Long Does the Examination Take?

The duration depends on the quickness of the team, (currently the so-called Helical CT scans are quite fast) and the segment of the body that needs to be studied. Normally, any examination lasts no longer than 20 to 30 minutes.

Who Is Will Be Performing The CT?

A medical specialist in radiodiagnosis plans the examination, evaluates and diagnoses the images, and issues a report that is sent to the patients physician who will analyse it along with other images or laboratory tests.

Along with the radiologist, a nurse and radiologist technician will collaborating and answering doubt that arise from the patient of family members.

What Are The Most Frequent Indications?

Examinations for head injuries or neurological diseases,…Thorax and abdominal scans due to various diseases, spinal examinations, etc…

On numerous occasions and in the same CT room, “Interventional diagnostic procedures” are performed, to take samples of ill organs or even to treat medical complications such as abscesses or infected fluid collections.

Este sitio web utiliza cookies para que usted tenga la mejor experiencia de usuario. Si continúa navegando está dando su consentimiento para la aceptación de las mencionadas cookies y la aceptación de nuestra política de cookies, pinche el enlace para mayor información.

Aviso de cookies