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Low Dose Thoracic CT Scan

Thoracic Pathologies and Radiation Problems

The scanner is the reference diagnostic tool for thoracic pathology. Unlike a standard X-ray, sectional images help to avoid the appearance of shadows. Thanks to the air in the lungs and the contrast media, the resolution is ideal for lung parenchyma examination. In addition, the thoracic scanner has a very high spatial resolution, exceeding the performance of the MRI as part of a health check.

Fast and easy to perform (4 to 5 seconds), CT scan significantly reduces movement artifacts. In addition, the various filters, the software and the 3D reconstructions make it possible to improve the interpretation of the images obtained. Unfortunately, the CT scan shows a very high level of radiation. The low dose chest scanner has been developed to work around this problem.

MAJOR ADVANTAGES OF THE TECHNIQUE

With the low-dose chest CT scan, the primary goal is to obtain usable images with a radiation level equivalent to that of a standard X-ray. The dose is then adjusted according to the age and body size of the subject. The examination thus displays a radiation rate in the order of 1/10th to 1/20th of the 25th percentile of the reference level. Set by the ASCN (Nuclear Safety Authority), this value corresponds to the average dose used in hospitals.

At its lowest level, the low-dose chest CT scan by the best CT scan Centre in Delhi provides satisfactory images for nodule observation or monitoring of problems such as pleural effusion, pneumothorax, pneumonia, etc. With a slightly increased dose, it can serve as a first-line examination for the management of certain diseases. The examination has been particularly successful in the early diagnosis of bronchial cancer in the context of the National Lung Cancer Screening Trial (NLST).

The lung scan may be useful for detecting blood clots in the lungs (pulmonary embolism), but it has largely been replaced by CT angiography in the diagnosis of this condition. Pulmonary scintigraphy can also be used as a preoperative assessment in people with lung cancer. Pulmonary scintigraphy uses small amounts of a half-life radioactive substance to measure air and blood flow throughout the lungs. In general, the exam is done in two stages.

In the first step (pulmonary perfusion scintigraphy), a radioactive substance is injected into a vein, and the scanner produces an image of the diffusion of this product into the pulmonary bloodstream. If perfusion scintigraphy reveals abnormalities, it is necessary to proceed to a second step (pulmonary ventilation scintigraphy).

INDICATIONS AND DISADVANTAGES

The low-dose chest CT scan is particularly interesting because of the quality of the images obtained, its speed and the significant reduction of radiation risks. The technique is mainly used for the early detection of bronchial cancer in a population at risk and the follow-up of various thoracic disorders. Thus, doctors can quickly adjust the treatment of patients, case by case. However, computed tomography poses a significant problem because of CT scan price in Delhi.

Currently, low dose CT screening for lung cancer is four times more expensive than for breast cancer and ten times more expensive than for colon cancer. As a result, it is currently inconceivable to use it for repeated checks. The latter can indeed take several years and generate excessive expenditure for patients and care organizations.

The Differences between Making a Conventional CT Scan and One of the Latest Generation

The new computed tomography devices are not only less harmful to patients, but also facilitate and speed up the diagnosis process notably.

The doctor advised me that he has to perform a CT scan and that he will do it with a new generation computerized tomography equipment. What advantages do you have compared to the conventional CT?

The main advantage is that images is lower dose of radiation to the patient and lowest cost CT scan in Delhi. Also, its higher resolution power makes it possible to identify lesions with greater clarity and, being more quickly, the problems caused by the involuntary movement of the patient are reduced.

This new technology also allows heart studies to be made in the time that a heartbeat lasts, as well as screening for lung cancer using low radiation dose protocols. Finally, in the cases of patients who may have implanted metallic materials, it contains contracts that reduce the distortion of the image produced by these implants.

Does it involve any risk to undergo this test?

Only the inherent risk derived from radiation, although it is lower than in conventional CT since it has a precise dose control system that ensures the minimum radiation needed in each scan and for each patient (calculated about their physical characteristics). Also, it is a highly safe test in pediatric patients.

Do I require to do any prior preparation? Is the test always performed with contrast?

Most studies do not require any preparation on the part of the patient. Specific scans need fasting or certain restrictions in the diet. Some cardio logical examinations must be preceded by medication to control the heart rhythm, always under medical supervision. Neither is it still necessary to administer contrast, although in many cases its administration provides more information for diagnosis.

The conventional CT scan may take several minutes, depending on the body region and the size of the patient. CT is the technique of choice to acquire two-dimensional complete axial images of the body without the disadvantages of bone or air overlay of conventional radiographs.

One of the advantages of the helical technique by CT scan centres is the possibility of detecting lesions smaller than the conventional thickness of a cut.

Both in the CT with the single crown detector and in the multi-detector CT, the data is acquired continuously while advancing the table through the Gantry. The X-ray tube describes an approximately helical path around the patient. If the progress of the table is coordinated with the time required for a 360º rotation, the data acquisition will be complete without interruption.

In conventional CT the x-ray tube receives the energy for a rotation, which usually lasts 1sg and the intervals of 6 - 10 sg, this allows the tube to cool between one sweep and the next. In the helical CT, the x-ray tube is subjected to a crucial thermal state, since it receives energy for about 30 sg without interruption. Therefore, the helical CT tube is characterized by its high thermal capacity, its high cooling rates, and its large size. All these technical conditions increase the noise of the system.

Computed Tomography Of The Lungs

Computed tomography of the lungs is a method of X-ray examination, which is based on the reproduction of images obtained by circular scanning of the object by a directed beam of X-rays. In the study of lungs, CT provides an opportunity to determine the location of interlobar gaps, intersegmental septa clearly, and assess the state of bronchi and pulmonary vessels. Computerized tomography of the lungs is the fastest and most accurate method of diagnosing diseases in this area.

The Primary Indications for the CT Scan Cost in Delhi NCR Are:

  • Pleurisy
  • Tumor Education
  • Metastasis of tumors
  • Parasitic cysts of the lungs
  • Lung disorders caused by rheumatoid diseases
  • Abscesses
  • Suspicion of pulmonary arterial thromboembolism
  • Tuberculosis

Computer tomography of the lung can be performed on a conventional tomography or spiral. Traditional CT of the lung is performed to visualize pathological processes in the lungs. The study time is approximately 20 minutes. During the scan, the patient must repeatedly hold his breath. CT of the lungs, carried out on a spiral tomograph lasts only about 15 seconds and it is necessary to delay breathing only once. This method makes it possible to evaluate the state of the lymph nodes of the mediastinal organs as well.

No preliminary preparation is necessary before carrying out a computed tomography of the lungs to the patient. The only exception is when the CT scan cost in Delhi is performed with contrast. In this case, it is recommended to refrain from eating for 5-6 hours before the study, as when injecting a contrast agent, a feeling of nausea may appear.

Contrast substance helps to visualize soft tissues and blood vessels better. During the study, the patient is on the movable table of the apparatus, which moves inside the tunnel, and at this time a tomography ring rotates around it. After the end of the procedure, the patient expects results.

The doctor concludes within 10-15 minutes, then all the data (pictures and their description) are given to the patient's hands or sent by e-mail to the treating doctor. Depending on the type of pathology detected, the treatment can be prescribed by doctors: an oncologist, a surgeon, or a pulmonologist.

HOW TO SCAN?

The specialist helps the patient to take the correct position on the computer tomography table. It is possible to use soft straps or ribbons to help keep the neck in the right place.

During the scan, the patient will be inside the computer tomograph. Many X-rays will pass through the patient's body when the X-ray tube rotates around it. The machine will take pictures from many sides, forming transverse images (slices) of the neck.

The technologist leaves the room. During the scan, the patient will be alone in the place, but the technologist can always see, hear and talk with him through the intercom.

For the first few checks, the table quickly moves through the scanner. The schedule will proceed slower for the rest of the scan. Neck scanning can take up to 15 minutes. Then the doctor looks at the pictures on the computer.

Some patients need a contrast study. Patients will receive a contrast (X-ray dye) during the scan. The difference makes the tissues and blood vessels more visible to the doctor's view to see them in CT images.

Purpose, Process and Preparation For Abdominal CT Scan

The full form of CT Scan is Computed Tomography scan. You can call it a specialized x-ray that can produce and show you the cross-sectional images of any particular part of your body. When it is done for the abdomen area, then it is known as abdominal CT Scan.

Some Vital Points to Be Noted

Some critical points you must know regarding CT Scan Abdomen before you go through this test.

•    When a doctor suspects that there can be some abnormalities in the abdomen area of an individual, then he can advise for abdominal CT Scan.

•    If you have any dye allergies, then you must inform your doctor about the same before you go for this test.

•    In general, an abdominal CT scan takes 30 to 45 minutes to be done, and it takes 24 hours to prepare the report.

What Is The Purpose Of Having CT Scan

When your doctor suspects that something is wrong inside your abdomen and need a closer and clearer view of that area, then he can ask for a CT Scan. There are some symptoms due to which a doctor can advise you for this medical examination.

1.    Pain in the abdominal area

2.    To check the size and the location of the stones present in kidneys

3.    To check palpable mass in the abdominal area

4.    Unexplained weight loss

5.    To detect appendicitis

6.    To detect other abdominal infections

7.    Injuries inside the abdominal

8.    Blood clots

9.    Recent cancer diagnosis

10.    To check any obstruction in the intestinal area

Once the doctor gets the report of your CT scan, then he can check the same, and understand the cause of having any of these issues that are mentioned above. Sometimes, the doctor may suggest having the CT scan in between a treatment process to check the progress of that treatment on your body or the abdomen.

Process Of CT Scan

There is a certain machine used in CT scan. The device circles your body and sends its images to a computer which is adjoined with that device. Then those images will be viewed by a technician. Each of these images is viewed as a cross-section image so that it can provide the medical professionals with alternate views of your body.

Through an abdominal CT scan, the doctors are able to see the vessels, organs, and bones of your body in the cavity of the abdomen.

How To Get Prepared For This Test?

In general, the doctors ask the patients to fast for 2 to 4 hours before the test beings. They may also ask you to stop particular medication before this test. Since you will be needed to lie down on the best to go through this test; hence, you should wear something comfortable and loose. You should not wear any jewelry or other items when going through a CT scan.

To know the CT scan price, log on to www.3hcare.in and get details of diagnostic centers offering this service around your locality.

What is CT with contrast?

The CTS- Computed tomography is a diagnostic imaging method that, by exploiting the radiation, can represent the human body in the sections (tomography) performed according to axial planes, that is, with transversal cuts from head to toe. The X-ray tube, the element that emits X-rays, rotates around the patient, lying on a bed that moves horizontally.

The radiation passing through the patient's body are then converted into analog electrical signals and converted into digital data. In the most recent equipment (TAC multilayer or multidetector), sections, initially acquired according to the axial plane, can easily be reconstructed, without loss of detail, in all planes of space, sometimes using sophisticated dedicated reconstruction software.

What is CT scan with contrast?

The CT scan is used in motions fields: neurological, skeletal, trauma, thoracic, abdominal, cancer, gynecological, vascular and cardiac. With the multilayer, TAC can be displayed well not only the internal organs of the human body but also the arteries and veins.

What are contrast agents?

The contrast agents are substances or materials a radiology technician can be administered during a medical test to help better View the tissues and structures in your body. Commonly used in a computed tomography (CT) scans or magnetic resonance imaging (MRI) tests, the contrast media can help doctors diagnose certain medical conditions. While a severe reaction from the substances is rare, side effects and adverse reactions are possible.

The exam is designed exclusively for the study of the parenchyma (brain, lung, liver, pancreas, kidney, and uterus), the arterial blood vessels (aorta) and venous, soft tissue (muscle fascia), bones and joints.

How does the CT scan performed with contrast medium?

The patient is made to lie on a bed which flows through a short tunnel. There are claustrophobic. During the examination, it could be injected into a vein in the arm a contrast medium containing iodine, to make some details more visible (vascular structures and parenchyma). The injection causes a sensation of heat rather intense, but that fades quickly.

Contraindications

There are no absolute contraindications to the execution of a CT scan. Since it uses X-rays, it is however not recommended for pregnant women and children.

The use of contrast medium can be contraindicated in the case of previous allergic reaction to contrast media, renal insufficiency, severe heart failure and other rare conditions. In the case of doubt, please contact your doctor or medical department.

How to find best CT scan price?

While the prices for CT scan are usually dependent on the type of test, you are undergoing as well as the center or clinic you opt for, yet there are chances to get the lowest cost CT scan in Delhi. Search for the best offered price for CT Scan on our website www.3hcare.in with reputed and renowned centers.

Is CT Scan Imaging Same as MRI?

Both MRI and CT are two of the significant advances in current medicine since they allow the examination and detection of diseases using non-invasive methods, without the use of pesky and aggressive techniques such as lumbar punctures or arthrography for the patients.

For both reviews, the patient should lie on a stretcher and enter a relatively narrow cylindrical tunnel. The difference is that in MRI test the tube is a large electromagnetic magnet that allows you to take pictures of the inside of the body by subjecting it to a magnetic field. In a CT, the images are taken using an X-ray beam that makes a circular movement that surrounds the area to be investigated (multiple X-rays from various angles).

With the CT tests, it is possible to reconstruct in three dimensions the area explored, which is very useful when planning a surgery and is the order of the day to locate and treat tumors. Both are image tests, but they are not the same. The CT Scan cost is highly dependent on the scan center and clinic you are going for!

Magnetic resonance uses powerful magnetic fields to produce and detect changes at the molecular level of substances like the hydrogen that contains our body. These changes are very subtle and disappear when we leave the machine, but the machine can detect them and translate them into images of the interior of the body.

Both CT and resonance allow us to explore the inside of the body, but each one is more sensitive to a particular type of injury, so your doctor will indicate the one that is most appropriate as the case may be.

What is a CT Scan Test? What Does it Consist of?

The CT scan test is performed with a device called a scanner. During this test, the body is subjected to multiple rays released simultaneously from different angles, and then a computer assembles them to generate an image of the area to be studied. CT scanning is more detailed than an x-ray since only a beam of light is used on the current x-ray.

Because CT scan is a non-invasive procedure that provides detailed cross-sectional views of all tissue types, it is becoming the ideal method to diagnose many intestinal diseases such as diverticulitis and appendicitis and to visualize the liver, spleen, pancreas and the kidneys.

And Magnetic Resonance- What Does it Consist of?

On the other hand, Magnetic Resonance is a machine that allows obtaining an image of the soft tissues of a patient using the use of a magnetic field. Powerful magnets and radio waves are used to create body images. The main difference between CT and MRI test is that the second one does not use X-rays. Other differences are that the CT scan is faster to perform but has a lower resolution.

Because MRI test can give such clear images of the soft tissues around the bones, it is the most appropriate examination for spine and joint problems. It is also widely used to diagnose sports injuries, especially in the knee, shoulder, hip, elbow, and wrist. The images allow the doctor to see even tiny tears and lesions in the ligaments and muscles.

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