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Myths And Realities Of Computed Tomography

For the prevention, diagnosis and treatment of diseases there are various medical technologies such as ultrasound and computed tomography, which allow the doctor to know the health status of a patient.

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Computed Tomography (CT) is an advanced medical equipment with which images are obtained through the combination of x-rays (x-rays) and computed technology that allows cross-sections (horizontal and vertical) to be obtained from any area of ​​the body.

The advantage of this technology is the quality and detail of the images of bones, muscles and organs, which is why it is frequently used for the diagnosis of cancer and heart disease. Before having a CT scan, it is suggested to know the CT scan head cost in Delhi.

For the diagnosis of cancer, Dr. José Hinojosa, head of Radiotherapy at the Cancer Centre of the ABC Hospital, said that together with the pathological examinations, the images help to characterize the tumour, which allows, among other diagnostic elements, identify if the patient is a candidate for operation.

However, when a patient is asked for a tomography study, there are doubts and fears about this type of procedure, below we share some myths and realities about the CT scans.

Myth 1

The tomography hurts.

Reality

Computed tomography does not cause pain, it is even a study that can be performed on an outpatient basis, unless it is part of the treatment of an inpatient.

Myth 2

Tomography causes radiation.

Reality

With the technological advancement, equipment such as the Philips Ingenuity CT, have managed to reduce radiation to the patient by up to 80%. More radiation is received in a morning sunbathing on the beach than in a CT scan.

Myth 3

Tomography is a complicated procedure.

Reality

It is a very simple procedure, where specialized personnel attend and instruct the patient at all times. Alejandro Sampedro, a 22-year-old patient, commented “during the first scan I was afraid, however I learned that the important thing is to live the experience in a relaxed way, be with yourself and especially cooperate with the medical staff to facilitate your work and have a better Outcome. It is, in short, a simple procedure. ”

It is important to be assured that the medical staff is on the lookout for the patient throughout the procedure and that the sounds and movements of the scanner are to emit low doses of x-rays that, absorbed by the body and detected by the scanner, will result in Reliable images that the doctor will have to make an accurate diagnosis.

So if you have doubts about any symptoms, do not forget to go to the CT scan centre in Noida, and it is even better to consult it when nothing hurts because prevention is always better and cheaper. You have to overcome the fear of the great devices that have been created to help take care of your health.

Alzheimer's Diagnosis, What Are The Differences Between A Resonance, A CT Scan And A Cerebral PET?

Magnetic resonance imaging, Computed Axial Tomography (CT) or Positron Emission Tomography (PET) are three neuroimaging tests that allow us to obtain 3D brain images and high resolution. Neurologists can request them to confirm a diagnosis of Alzheimer's disease and rule out other causes that may be behind cognitive disorders such as memory loss.

computed-tomography

When we talk about these tests, the image that comes to mind is that of diagnostic testing which we have to be completely still, lying down and with our heads inside a donut-shaped device. Although the machine and a part of the procedure are similar, the three tests are different and offer us different information.

Here are the most significant differences between them:

Magnetic resonance

It works with a magnet. To get an idea of ​​its power, a 3 Tesla magnetic resonance is equipped with a magnetic field 60,000 times more powerful than Earth's. This magnetic field is combined with radio pulses to detect the magnetic characteristics of the body's hydrogen atoms, and thus be able to send the computer the information necessary to reproduce the brain image.

Provides comprehensive information of soft tissues. It is one of the most used techniques in research since it allows to obtain high-resolution images, with detail of up to 0.4 millimeters, in the case for example, of resonance of 3 Teslas.

It is harmless, does not produce ionizing radiation. Therefore, and due to the magnetic field, it is only contraindicated in people who have a pacemaker or metal implants.

The test usually lasts more than 30 minutes. The person inside the machine must be still during the entire acquisition.

It is a very noisy test. The sound comes from the vibration of the gradient coils, produced by the alternative passage of the current needed to scan.

CT

It works with an x-ray beam. The scanner allows obtaining multiple images, taken from different angles, from the absorption made by the different tissues to X-rays.

It offers bone, soft tissue, and air images. Its resolution in soft tissues is lower than that of magnetic resonance.

It emits small ionizing radiation. The risk of developing cancer due to radiation is negligible. However, it is not recommended to repeat the test excessively and its use is only prescribed in children when it is strictly necessary. Nor is it recommended for pregnant women, because of the risk that it may affect the foetus.

Some tests can be done in just 10 minutes. The person inside the machine must also be still during the entire acquisition. It is suggested to know the CT scan price in Delhi first, before having a CT scan.

Brain PET

It works with a radioactive tracer that is administered intravenously before testing. To take the images, the PET machine also incorporates a CT scan or an MRI.

Provides information about biological processes. Thanks to the contrast substances contained in the tracer, it allows obtaining high definition images to assess aspects such as, for example, the consumption of glucose in the brain, which indicates the activity of different areas or to detect the characteristic amyloid protein deposits of Alzheimer's disease.

It also uses ionizing radiation. Therefore, the best CT scan in Delhi is not recommended for pregnant women.

Why Is Computed Tomography Important For Diagnosing Diseases Of The Circulation?

Cardiovascular diseases have become one of the main reasons of death in the world. In several countries, according to data from the Ministry of Health, they are the first cause of death among the population. Computed tomography equipment can help doctors establish an early diagnosis to prevent circulatory system pathologies.

diagnosing-diseases

What is a CT scan?

A CT scan is a procedure that uses an x-ray source that revolves around a circular structure called Gantry. Each time a complete rotation is performed, a computer constructs a 2D image cut, repeating the process until the desired number of cuts is obtained. In each image cut, the thickness of the tissue to be checked is represented; this thickness can vary between less than 1 millimeter and 10 millimeters depending on the type of equipment used.

The images can rotate in space or see the cuts successively, generating a 3D image showing the skeleton, organs, and tissues of the patient simultaneously. Thanks to this, it will be more precise to locate the point where any anomaly is occurring.

CT scans are used to detect tumors, infections, fractures, hemorrhages, among other pathologies. Despite its versatility in clinical diagnosis, its use should be limited since exposure to X-rays is high (although it does not leave remains in the body after the end of the test). Special care must be taken with children, who are more sensitive to ionizing radiation.

Contrast for a CT

In soft tissues, the ability to retain radiation is variable and, therefore, more complicated to visualize inside. Therefore, contrast media have been developed, which makes these tissues highly visible in a CT scan.

In contrast, media the patient is injected with a substance rich in iodine that circulates to the organs, changing the way they look through the x-rays. In the case of the circulatory system, the contrast will illuminate the blood vessels in search of possible obstructions. It is essential to know contrast CT scan cost in Delhi first.

There are other types of contrasts, such as barium compounds that are used to examine the digestive system.

How can a CT diagnose circulatory diseases?

Angiography performed with computed tomography or Angiotomography (ATC) equipment analyses blood flow in different parts of the body, such as the brain, heart, abdomen, legs, and arms.

CT scan serves not only to assess the proper functioning of blood vessels but also to diagnose diseases related to circulatory problems such as:

  • Alterations in arteries or veins (aneurysms).
  • Atherosclerotic plaques in the arteries.
  • Obstructions in the blood vessels.
  • Congenital disease in the arteries.
  • Ischemic accidents or cerebral hemorrhages.
  • Arterial disease in the blood vessels of the heart.
  • Pulmonary embolism in the arteries etc.

Also, the ATC through computed tomography equipment are used by surgeons to see the result and evolution of an intervention performed or to plan a future surgery using it for example to:

  • Guide in a reconstruction of blood vessels.
  • Evaluate coronary veins after the placement of a pacemaker.
  • Review the efficacy of an angioplasty or stent placement.
  • Evaluate the need for a bypass.
  • Perform a tissue biopsy.

Angiography with computed tomography is a faster, non-invasive type of test that has fewer complications for the patient than is traditionally performed using a catheter.

Using The CT Method (Computed Tomography) In The Diagnosis Of Oncology

To detect the presence of cancer cells in the body, there are several modern methods of examination. One of them is computed tomography. With the help of this instrumental study, it is possible not only to identify oncology, but also to find its individual foci (metastases), as well as other pathological processes.

diagnosis-of-oncology

Metastases quickly spread throughout the body, affecting various parts of it. With the help of CT, one can detect both volumetric neoplasms and the smallest cancers. What is good about this study is that the image transmitted by the tomograph will allow you to examine any type of tissue - from soft to bone.

Why is it important to use computed tomography to diagnose cancer? Because the device will show the formation of any size - up to several millimeters. Thanks to such a detailed diagnosis, the oncologist has a unique opportunity to clarify the diagnosis and prescribe the right treatment. The CT scan price in Delhi varies according to the type of CT scan that is to be conducted.

The effectiveness of computed tomography has been proven in the study of such systems and organs as:

  • Lungs, bronchi;
  • Brain;
  • Pelvic organs;
  • Spine and other parts of the skeleton;
  • Blood vessels;
  • Skin integument, subcutaneous tissue;
  • Abdominal organs;
  • Lymph nodes.

When is computed tomography prescribed?

The CT method is effective in examining most organs and systems of the human body. Indications for examination are many pathological changes. So, it is necessary to carry out:

Brain tomography under the assumption of hemorrhagic stroke, vascular pathologies, neoplasms in the brain and meninges, hematomas (with the specification of their location). If the patient has a history of malformation or vascular aneurysm, CT scan is necessary. Before undergoing a CT scan, it is good to know the CT scan cost in south Delhi first.

  • CT of the head (cranial box) - in case of severe contusion, developmental abnormality, skull fracture, suspected cyst and other formation. The picture will allow the doctor to assess the patient’s condition and help to decide on the need for surgical intervention.
  • Computed tomography of the larynx, nose - if there is concern about the presence of a tumor, chronic sinusitis, and inflammation of the lacrimal flows.
  • Tomography of the lungs - to determine the presence of focal and pathological neoplasms, pneumonia, emphysema, etc.
  • CT of the chest - with suspected pathology in the organs located in the chest cavity: pleura, lungs, bronchi, esophagus, heart, lymph nodes.
  • Computed tomography of the spine - in difficult cases, to clarify the diagnosis. Indications for CT - scoliosis, trauma, osteoporosis, leg pain, intervertebral hernia, damage to the vertebrae and discs, osteochondrosis.
  • Tomography of the abdominal cavity - to determine the presence of cysts and their size, pancreatitis, blood clots, inflammation, appendicitis, fluid accumulation, pathological changes. This examination is indispensable for suspected neoplasms.
  • CT of the joints (shoulder, hip, knee) - to determine the cause of pain in the joint during movement, the accumulation of fluid in it. Such a study is carried out when the patient is suspected of developing arthrosis, arthritis, as well as to determine the degree of pathological changes in the joints.
  • Computer tomography of the genitourinary system - with suspected cancer in the bladder, kidneys.
  • CT of the intestine - to establish the cause of the problems in this organ.
What Are The Causes Of Chest Pain?

Pain in the chest is one of the most important symptoms of a number of diseases of the heart and blood vessels. Chest pains can be caused by pathology not only of the heart, but also of other organs and tissues of the chest, and also caused by diseases of the abdominal organs.

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Timely differential diagnosis of chest pain requires a doctor with sufficient theoretical knowledge and knowledge of the methods for examining patients at the CT scan centre. Chest pain may appear in a previously healthy person for the first time in their life.

In other cases, the patient develops pains of a different nature than before, and this may be due to the progression of an existing disease or the appearance of its complications.

The most important characteristics for differential diagnosis of chest pain: factors that provoke pain, localization of pain, duration, depth, circumstances of pain relief, as well as some other specific features of the pain syndrome. You should first know the chest CT scan cost in Delhi, before going to have a CT scan.

Provocative factors

When collecting an anamnesis, it is necessary to determine the dependence of the occurrence of pain on various circumstances and situations in which the pain begins to bother the patient or intensifies.

  • With an attack of angina pectoris, pain often occurs during exercise.
  • Pain characteristic of pericarditis occurs with a change in body position and deep breathing.
  • For pleural pain with pneumonia, pneumothorax, pleurisy, a connection with breathing is also characteristic.
  • With peptic ulcer and esophageal reflux, the relationship of pain with food intake (on an empty stomach), time of day (at night), and body position (lying) is important.
  • With esophagospasm, chest pain often occurs during exercise or after a cold drink, but can also be spontaneous.
  • Pain in vertebral hernias is often aggravated by movement of the head and neck and palpation, which is also characteristic of musculoskeletal pain.

 Pain localization

The sternal pain localization characteristic of IHD is also observed in diseases of the esophagus, in case of hyperventilation, and pulmonary hypertension. Against the background of the pathology of the gastrointestinal tract, pains are often localized in the lower part of the sternum and in the epigastrium. Pain with stratified aortic aneurysm often radiates to the back or lumbar region.

The basic principles of medical tactics for acute chest pain

  • With any nature of the pain syndrome, an electrocardiographic study is performed to exclude the most formidable pathology - acute myocardial infarction.
  • Patients who are in doubt about the diagnosis, aged over 40 - 50 years old with intense pain in the chest (even atypical nature of angina pectoris), before the diagnosis is clarified, it is advisable to be hospitalized,

In all cases, it is necessary to strive for the maximum removal of the pain syndrome. Naturally, the relief of pain is carried out taking into account its pathogenesis and should be only part of the complex therapy of a known or suspected underlying disease.

Important Pointers To Consider For A CT Scan In Case Of Suspected Abdominal Injury

Doctors are concerned about the active appointment of an examination using computed tomography (CT) in paediatric traumatology. With this diagnostic method, the child is exposed to x-rays, which in the long term increases the risk of cancer. Therefore, CT should be prescribed in case of emergency. Before going for a CT scan, it is suggested to first know the CT scan cost in Noida.

A group of American scientists from the University of California School of Medicine at Davis conducted a study to determine the feasibility of appointing a CT scan in cases of suspected abdominal injury. Researchers studied data from a little over twelve thousand patients aged 5 to 16 years who were admitted to the hospital with suspected abdominal injury as a result of an accident or for other reasons from 2007 to 2010.

It turned out that 45% of CT patients were prescribed in the emergency department. In 6%, abdominal injuries were recorded, which could be detected using the method of computed tomography. Only 25% of these patients needed emergency surgery, such as surgery or a blood transfusion.

After analysing the data obtained during the study, experts identified seven main signs indicating a small probability of trauma to the abdominal cavity. They believe that a child should not be sent to a CT scan of the abdomen if:

  • On the stomach there are no traces of the seat belt or other visible damage;
  • No evidence of chest injury;
  • The patient does not complain of abdominal pain;
  • No breathing difficulties;
  • No vomiting.

According to researchers, the predictive value of these rules is 99.9%, sensitivity - 97% and specificity - 42.5. In practice, among patients whose condition was assessed taking into account these signs, in one case out of a thousand, acute abdominal trauma was identified, requiring medical intervention.

How accurate is it to get body scans with high-tech CTs for early diagnosis? Is it possible for any health damages to repeat these examinations every year (even almost every six months)? Are these tests a significant benefit in terms of health protection and early diagnosis of diseases? Let's continue to ask: How accurate is it to perform a CT scan for every headache, neck stiffness, pain in the waist, numbness in the leg?

There is a significant increase in unnecessary CT scans. Due to some unimportant images detected in these scans, people are unnecessarily worried and re-subjected to new CT scans. It is also important that the method is expensive. There is a serious economic loss. There are radiologists who say that no country in the world has as many CT devices as in our country (for example, in Istanbul).

'Needs' should be questioned well

Even if different and new CT scanners have been developed in recent years to help expose them to a lower dose of irradiation, those who plan to have these scans (whether doctor or patient does not notice) need to question the “need” well. When used correctly, it is very important to determine who should perform this screening and how often, under what conditions and the CT scan cost in Delhi. Otherwise, our bodies could become radiation dumps.

Computed Tomography: What Is Important To Know?

Computed tomography is a non-invasive x-ray diagnostic method that can serve as the basis or an additional source of information when making the correct diagnosis and prescribing the necessary treatment.

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Is computed tomography safe?

Yes, CT is considered a safe method. X-ray dose is relatively low. There is a small risk in the presence of concomitant pathology of the kidneys, thyroid gland, bronchial asthma, if the use of contrast agents is used. It is good to know the CT scan price in Delhi before undergoing one.

The patient should warn the doctor if he is allergic to drugs, iodine, seafood, if he suffers from diabetes, bronchial asthma and thyroid diseases and about the drugs that he takes.

During pregnancy, the question of conducting a CT scan is decided by the attending physician; a woman must inform about the presence and timing of pregnancy!

Information for patients:

  1. As a rule, computed tomography is performed without preliminary preparation.
  2. With the use of intravenous contrast agent on an empty stomach.
  3. In chronic diseases of the liver and kidneys without exacerbation, moderate fluid intake is recommended 6 hours before the study.
  4. The study time is 15-25 minutes; scanning itself from 4 to 20 seconds.
  5. During the scan, you need a stationary body position on the table and the ability to carry out breath holding commands for 4-20 seconds.
  6. Before the study, clothing with metal hooks, buttons and zippers should be removed; jewellery in the form of chains and earrings.
  7. With the introduction of a contrast medium, the patient may feel a passing wave of heat.

To undergo research in the CT-MRI department, you should have:

The passport- A referral for the best CT scan in Delhi from a doctor, which indicates:

  1. Name
  2. No. of medical history or outpatient card
  3. The diagnosis
  4. The field of study with the formulation of a specific task (identification, exclusion or confirmation of the presence of changes on the part of the examined organs and systems)
  5. A note on the absence of contraindications for intravenous administration of a contrast medium (if the study is conducted with contrasting). When recording a patient, he is informed of the time of arrival at the department (and not the time of the start of the study)

Relative contraindications to the administration of contrast medium:

  • Pregnancy
  • Allergy to iodine-containing contrast agents
  • Severe hepatic and renal failure
  • Decompensated diabetes mellitus
  • Myeloma
  • Decompensated thyroid disease

Recommendations after computed tomography using a contrast agent:

* It is very rare for patients to have a rash on their skin, etc. - side effect of injection of iodine solution. Therefore, the outpatient should be under the supervision of a doctor in the CT-MRI unit for 2 hours, so that in case of a skin reaction he can receive timely medical help.

* If you have been given a contrast drug intravenously, it is recommended that you drink clean water within the amount allowed by your doctor for a day (1-3 l) in order to speed up the removal of the contrast drug from the body.

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