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Practice Radiologie am Rathausmarkt

Focus: MRI, CT and Mamma Diagnostics & Digital X-Ray

Mönckebergstraße 31 · 20095 Hamburg

Appointments

E: rathausmarkt@radiologische-allianz.de
T: +49 40-32 55 52-101
F: +49 40-32 55 52-201

How to reach us by public transport

Rapid transit lines U & S, station “Jungfernstieg”, approx. 5 min. walk, Rapid transit line U3, station “Rathaus”, Metrobusses no. 4, 5, 6 & bus no. 109, Rapid busses no. 35, 36, 37, until station “Rathaus” 

Doctors

Dr. med. Jörg Gellißen Radiologist  ·  Dr. med. Ulrike Golin Radiologist  ·  Dr. med. Alexander Hoffmann Radiologist  ·  Dr. med. Andreas Keulers Radiologist  ·  PD Dr. med. Thomas Kucinski Radiologist, Neuroradiologist  ·  PD Dr. med. Jörn Lorenzen Radiologist, Nuclear Medicine Physician  ·  Dr. med. Rudolf Rieser Radiologist  ·  Prof. Dr. med. Jörn Sandstede Radiologist  ·  Dr. med. Maria Schofer Radiologist  ·  Dr. med. Joachim Schubert Radiologist

Radiologie am Rathausmarkt

Methods


Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging (MRI)

Magnetic Resonance Imaging (MRI) is a medical imaging technique used primarily in medical diagnostics to visualize internal structure, the function of tissues and body organs.

MRI uses electric and magnetic fields. The high-frequency pulses (radio waves) stimulate atoms with an odd mass number (dipoles) in the human body, so that they vibrate. Different types of tissues of the body are determined by different so-called relaxation times. In this way, the contrasts between organs and tissues are made visible.

Images showing the body on each possible level depict all organs in detail, thus meaning that potential pathological changes can be recognized.

The process is performed completely without x-rays. However, in Germany it may only be used by radiologists.

MR Angiography

MR Angiography

This method makes it possible to examine your blood vessels without surgical intervention. With the help of the magnetic field technique, we create a three-dimensional model of your vessels so we can see if everything is running “smoothly” there. It helps to recognize narrowing and tissue weaknesses (aneurysms) that may cause circulation problems, stroke or bleeding. The MR Angiography is so advanced that its image quality is the same as that of conventional angiography. In case of specific problems beyond vasoconstriction, e.g. in an upper or lower limb artery, MR Angiography provides more precise information than conventional angiography does. 

Advantages of MR Angiography compared with X-ray Angiography (DSA)

The standard method of examination used to be X-ray Angiography. For this purpose, a thin tube (catheter) was inserted from the groin into the artery. While x-ray contrast media was injected through the catheter under high pressure, we would create x-ray images which depicted the blood vessel filled with contrast agent.

MR Angiography no longer requires inserting a thin tube (catheter) from the groin into the artery. This saves approximately four hours of semi-hospitalization. In MR Angiography a contrast agent is injected into the vein. In addition to that, no x-rays are used in MRAngiography, but the vessels are visualized with the help of a strong magnetic field.

Advantages of MR Vessel examination

  • In MR Angiography, no catheter is inserted into the femoral artery. The contrast material is injected only into the arm vein.
  • In the case of specific problems, MR Angiography provides more detailed information than the regular x-ray angiography.
  • The examination is done quickly and without semi-hospitalization.
  • There are no problems such as bleeding or clotting disorders.
  • MR Angiography does not use x-rays. The vessels are shown with the help of a strong magnetic field.
  • The contrast agent used in MR Angiography does not contain iodine and can therefore be used for patients suffering from hyperthyroidism.

The procedure is completed without x-rays. However, in Germany it may only be performed by radiologists.

Computed Tomography (CT)

Computed Tomography (CT)

In Germany, Computed Tomography may only be performed by radiologists.

Unlike a regular x-ray examination, CT creates not only a simple silhouette, but also a cross-sectional image of the corresponding organ or body section. One or two x-ray sources rotate around the affected body part during recording, while the opposite x-ray detectors collect the weakened beams left after having gone through body structures (organs, bones, soft tissue).

Converted into digital data, this information provides a slide by slide picture of an anatomical cross-section that can be reconstructed and viewed on the screen.

CT Angiography

CT Angiography

In exceptional cases when MR Angiography cannot be performed, for example due to a pacemaker, we also offer CT Angiography. This, however, is carried out by using an iodinated contrast agent and x-rays. But the contrast agent is only injected into your arm vein and no catheter is inserted into the groin. Therefore, the CT Angiography procedure is performed as quickly as the MR Angiography. It does not require any follow-up, so you can take up your usual activities after examination. In general, this examination does not differ a lot from the MR Angiography.

Mamma Diagnostics

Mamma Diagnostics

The Radiologische Allianz offers the whole range of breast diagnostics along with the newest equipment. In addition to digital mammograms, we also use the following diagnostic procedures:

Tomosynthesis

In 3D tomosynthesis, three-dimensional images of the breast are created. This means that we can recognise tumours which are hidden by overlapping tissue – something which was not possible until now. The presentation of the breast tissue without anything superimposed on it makes a more precise diagnosis possible, and reduces the number of so-called false positive results.

Sonography

Sonography is an additional procedure which can be used to characterise results which cannot be evaluated reliably using a mammogram alone, and to confirm results found by touch. For women aged 40 or younger, the imaging procedure is the first choice. Women over 40 should also have a mammogram if they have high mammary gland density.

Biopsy as outpatient procedure (vacuum-assisted and punch biopsies)

Inconclusive results can be clarified by taking tissue samples under local anaesthetic. The removal of the tissue is monitored using an imaging procedure.

MR Mammography

During MRI of the breast, images are created using contrast agent. This is the most sensitive procedure available for diagnosing breast cancer. It can be used as an additional method in the case of inconclusive results, and to answer specific questions as part of post-operative aftercare.

MR Mammography

MR Mammography

Sometimes, the MRI examination of the breast can be used not only complementarily, but also as an alternative to x-ray mammography. It can help to clarify certain issues that may have possibly been left open after mammography and other examination procedures of the breast. As no x-rays are used during magnetic resonance imaging (MRI), this method is considered to be especially gentle.

The breast MRI is performed, for example, in order to precisely examine patients with breast cancer before surgery. In the after-care of patients who have already undergone breast surgery or have breast implants, MR Mammography is also used. This method complements the conventional x-ray mammography procedure, especially for women with dense tissue structures. 

MR Mammography indisputably has the highest sensitivity and preciseness for the detection of breast tumours that are already growing invasively.

Who are the examinations intended for?

  • For women with diagnosed changes in the breast tissue (such as a digital rectal examination, or abnormalities in the x-ray or ultrasound examination): Magnetic Resonance Imaging of the breast may clarify whether the changes in the breast are benign or malignant, in the cases when the usual screening tests such as mammography (x-ray) and ultrasound do not provide reliable information.

  • For patients with breast cancer, as a test before surgery to exclude other focuses of cancer and to plan the operative procedure. Should chemotherapy be required before surgery, its efficiency and progress can be checked. 
  • For breast cancer patients in after-care to exclude a scar recurrence (tumour formation on the scar) with greater safety.
  • For women with breast implants (e.g. silicone): The implants can interfere with the conventional diagnostic mammography (the implant covers large parts of the glandular tissue as a ‘shadow’). In addition, the position and integrity of the implants can be checked. 
  • For patients who may have specific reasons which do not allow them to undergo breast cancer screening or x-ray mammography or they do not wish to do it: For example, young women with frequent breast cancer cases in the family history, who need an early detection of breast cancer as early as after the age of 30.

Advantages and disadvantages of magnetic resonance imaging of the female breast

  • The images are created with the help of a strong magnetic field. X-rays are not required.
  • The magnetic resonance imaging can be so good that it complements mammography and / or breast ultrasound in case of appropriate indications.

Magnetic resonance imaging alone cannot always distinguish benign tumours from malignant ones or detect breast cancer in its preliminary stages (carcinoma in situ).

The procedure is performed completely without x-rays. However, in Germany it may only be performed by radiologists. 

Low-dose Mammography and Tomosynthesis

Low-dose Mammography and Tomosynthesis

The Radiologische Allianz also offers Low Dose Mammography, Tomosynthesis (3D mammography of the breast) and often a Computer Assisted second Diagnosis, (CAD).

Low Dose Mammography

A mammogram is an examination of the breast using x-ray. It is used to diagnose breast cancer in its early stages, and in connection with breast cancer operations. A mammogram can make the tiniest tumours visible at very early stages when they cannot yet be felt, thus improving the patient’s chances of recovery. The Radiologische Allianz works with digital mammograms as its standard method.

Scientific studies confirm that mammograms are the best way to diagnose tiny tumours in their early stages. For this reason, this examination method forms the basis of the Radiologische Allianz’s breast cancer prevention approach.

With the same image quality, the low dose mammogram makes it possible to reduce the radiation dose by up to 30 percent by dispensing with the anti-scatter grid. In view of the large number of mainly healthy women who are examined as part of early detection mammography, this is a significant change.

Tomosynthesis

In 3D tomosynthesis, three-dimensional images of the breast are created. This means that we can recognise tumours which are hidden by overlapping tissue – something which was not possible until now. The presentation of the breast tissue as a cross-section without anything superimposed on it makes a more precise diagnosis possible, and reduces the number of so-called false positive results. This technique is used by the Radiologische Allianz in addition to the usual digital mammograpy and other breast diagnostics methods, in particular for patients with dense mammary tissue and an inconclusive diagnosis.

Periradicular Therapy (PRT)

Periradicular Therapy (PRT)

Periradicular Therapy (PRT) is a form of therapy that can be used in case of chronic back pains which are caused by changes in the intervertebral discs (e.g. herniated disk). The treating physician inserts a thin needle into the area of the nerve root and/or into the small vertebral joint. When the needle is correctly positioned, which is checked by computed tomography, a mixture of a local anaesthetic, a cortisone preparation and an x-ray contrast agent are administered. The medication is only active in the nerve root. An effect on the whole body is almost excluded. The intervention is carried out under local anaesthesia.

We carry out this procedure with the help of multislice computed tomography (multislice CT). Therefore, we are able to precisely check the position of the tip of a needle and we can treat the area causing pain very precisely. It is also possible to distinguish other structures such as blood vessels, bones and muscle tissue, in order not to damage them.

After four to six sessions, the patient will suffer from much less pain or will be completely pain-free.

Digital X-ray

Digital X-ray

X-rays are electromagnetic waves which are produced with an X-ray tube for medical purposes. In German, they are named after Wilhelm Conrad Röntgen, who discovered them in 1895 in Würzburg. In the x-ray system, the x-rays developed by it are sent through the body area being examined, and then the photons let through are transmitted to a digital detector system for the development of an image. The dose is accurately recorded and documented.

The dose the patient is exposed to during an x-ray examination, is kept as low as possible. Compared with the early 20th century, less than 1 percent of the radiation dose needed at that time is needed today for creating an x-ray image.

The Radiologische Allianz has switched completely to digital radiography. The advantages are the lower radiation dose and the fact that it is possible to save the image in a digital archive. We can mostly forgo usual x-ray images. Patients will receive prints and a CD, on which the data are saved instead. So the patients can look at the results of their examination on any modern PC or tablet.

Neuroradiology

Neuroradiology

Neuroradiology is the examination and treatment of diseases of the central and peripheral nervous system with the help of imaging procedures such as Magnetic Resonance Imaging (MRI) und Computed Tomography (CT). The visualization of vascular diseases, for example a narrowing of the carotid artery, can be performed by means of MR or CT angiography instead of an invasive intra-arterial angiography. Neuroradiology is a subfield of radiology, which requires an additional specialization.

The most frequent and important examination is the MRI of the central nervous system as well as of the spinal column and brain. In many cases, such as after a nerve root compression caused by a herniated disc, it is not necessary to use intravenous contrast agents.

Many common clinical problems can be clarified with the help of computed tomography. In addition to this, calcifications and bone structures can be presented in great detail. CT Angiography can be a reasonable alternative to an MR Angiography when an especially high resolution is required, for example a tear of the posterior cerebral artery (vertebral dissection). Furthermore, the CT helps to precisely place an injection needle near a painful nervous root (Periradicular Therapy) or to make a contrasted visualization of the spinal canal (CT-Myelography).

Integrated Imaging of the Nervous System

By this, we understand the use of imaging procedures to clarify illnesses and functional disorders of the nervous system. It is less about simply showing the organ (brain, spinal cord, nerve) than about the type of disorder – modern imaging procedures can make a crucial contribution to explaining this. The procedure can be used, for example, to investigate cerebrovascular illnesses such as an impending circulatory disorder in the brain (stroke), to assess the risk of carotid artery stenosis, inflammation of the brain and spinal cord, memory disorders (dementia), illnesses of the white brain matter, tumour diseases and relapses following treatment, unclear neurological symptoms, and illnesses of peripheral nerves.

We use specific special procedures for this purpose:

  • Blood vessel examinations (MR and CT angiographies)
  • Measurements of blood flow to the brain (perfusion measurement)
  • Plaque imaging (detailed picture of a narrowing of the carotid arteries)
  • MR spectroscopy for the differentiation of changes in tissue
  • Diffusion imaging for the recognition of brain tissue affected by circulatory disorders, cell-rich changes, and nerve pathways.
  • MR Neurography
MR Enteroclysis (Small Intestine)

MR Enteroclysis (Small Intestine)

With the help of the magnetic resonance imaging it is possible to see the small intestine. Thus, MRI is an alternative to conventional examination of the small intestine with enteroclysis. There is no need to insert a probe into the small intestine.

MRI helps to visualize not only changes in the inner bowels, but also thickening or inflammation of the bowel wall and its environment. The examination is used to diagnose inflammatory bowel diseases such as Crohn’s disease and ulcerative colitis, the infestation and the extension of the disease.

The procedure is performed completely without x-rays. However, in Germany it may only be performed by radiologists.

Prostate MRI

Prostate MRI

The examination of the prostate with the help of magnetic resonance imaging (MRI) is a modern diagnostic method to combat prostate cancer. This method combines several advantages: firstly, the organ to be examined can be visually separated into different layers of tissue. Furthermore, it is non-invasive and, unlike the computer tomography, x-rays will not be used to create images. The examination of the prostate is performed with the help of two coils. The painless insertion of the endorectal coil into the rectum makes it possible for the probe to approach the prostate and thus create high-resolution imaging.

The procedure is performed completely without x-rays. However, in Germany it may only be performed by radiologists.

Who is this examination for?

  • For men who have an increased PSA level 
  • For men whose tissue sample taken after a PSA increase was benign, but their PSA level continued to increase (MRI prostate biopsy before second punch biopsy)
  • As additional guidance for the upcoming decision on treatment (e. g. surgery, radiotherapy, hormonal therapy?) for men with histologically diagnosed prostate cancer.
  • When, after removing the prostate, the PSA level rises again. Is this a local recurrence? Is there a lymph node enlargement in the pelvic area? Many radiation therapy institutions require this cross-sectional imaging procedure before the start of therapy.

Advantages and disadvantages of Prostate MRI

  • No x-rays are required.
  • A tumour, and in particular the question of the size and advancement of a prostate cancer in its surrounding. The infiltration of the seminal vesicles is safer with MRI than with other cross-sectional imaging methods.
  • The lymph nodes of the pelvis and especially the regional lymph nodes in the immediate vicinity of the prostate gland can be detected with high resolution on three levels with the endorectal coil. 

Disadvantage: In the past, severe inflammation of the prostate (prostatitis) could be similar to morphologic carcinoma and a tumour.

Pelvic MRI

Pelvic MRI

Magnetic resonance imaging (MRI) of the pelvis - also called nuclear resonance imaging of the pelvis - is a radiological examination method used to visualize structures in the area of the pelvis with the help of a magnetic field.

The Pelvic MRI is a very accurate diagnostic procedure used in case of the following diseases and symptoms:

  • Suspected disorders in the pelvic floor such as defecation disorders
  • Suspected prolapse of the uterus or bladder due to muscular weakness of the pelvic floor muscles
  • Tumours in the pelvic floor area
  • Congenital defects in the pelvic floor area

The procedure is performed completely without x-rays. However, in Germany it may only be performed by radiologists.

Whole Body Imaging (MRI), Early Diagnosis & Prevention

Whole Body Imaging (MRI), Early Diagnosis & Prevention

Whole body MRT makes it possible for us to view an image of the whole body – all organs, the skeleton, the spine, the circulatory system and the joints. The examination is principally for the early detection of cancer. Depending on the patient’s age and genetic or other previous conditions, other questions can be answered – such as whether there is a narrowing of the blood vessels. The examination can take place without x-ray and usually without the use of contrast agent.

Sports Medicinal & Musculoskeletal Diagnostic Procedures

Sports Medicinal & Musculoskeletal Diagnostic Procedures

The focus of the practice is on musculoskeletal imaging in order to diagnose acute and chronic illnesses of the whole musculoskeletal system in adults and children. Cartilage is of central significance for the integrity of the joints. Using ultra-high-resolution MRT, an unparalleled image can be created of the deterioration of cartilage – even in its early stages. An exact diagnosis forms the basis for early and efficient treatment. Of course, we also offer measurement of bone density for the early recognition or progress and therapy monitoring of osteoporosis.

Cardiac MRI

Cardiac MRI

Thanks to rapid technological and scientific development, the magnetic resonance imaging of the heart - Cardiac MRI for short, is now an established method for the diagnosis of various heart diseases. The Cardiac MRI is an accurate method with which to measure heart size and function. In addition to that, even the smallest change in cardiac output can be reliably detected by MRI.

Coronary artery disease (CAD) – initial diagnosis due to detection of vascular disorders

CAD is one of the most common cardiac diseases. It is caused by atherosclerosis or „narrowing“ of the coronary vessels, leading to vascular disorders of the heart muscle.

In later stages it can often cause some common symptoms such as angina pectoris or heart attack. With the help of MRI, it is possible to detect blood flow disorders of the heart muscle and measure the heart size and function. In addition to that, so-called „silent“ heart attacks are detected, which the patient did not notice. They can be the only signs of CHD.

Coronary artery disease - detection and assessment of heart attack

Despite the progress in diagnostics, a sudden heart attack remains a constant threat. After a heart attack, the heart might only work in a limited manner. A Cardiac MRI can precisely determine cardiac function, size, the nature and prognosis of heart attack. It is considered to be the most accurate method for detecting scar tissue in the heart muscle.

The MRI of the heart is also used for diagnosing other heart diseases:

  • Congenital heart defects in childhood and adulthood
  • Acquired valve defect
  • Heart muscle disease (cardiomyopathy)
  • Heart muscle inflammation (myocarditis)
  • Thrombi or tumours in the heart.

Advantages of magnetic resonance imaging of the heart

The MRI of the heart is also used for diagnosing other heart diseases:

  • MRI of the heart can precisely determine cardiac function, size, as well as the nature and prognosis of heart attack.
  • It is considered to be the most accurate method for detecting scar tissue in the heart muscle, or so-called „silent“ heart attacks.
  • No heart catheters need to be inserted into the artery.
CT Coronary-Angiography/Cardiac CT

CT Coronary-Angiography/Cardiac CT

CT Coronary Angiography / Cardiac CT

The CT Coronary Angiography is performed in order to rule out narrowing of the coronary vessels in case of relevant risk factors or by abnormal symptoms. In addition, the patency of stents or of coronary artery bypass grafts can be securely detected. With the help of CT Coronary Angiography, the coronary arteries are depicted without having to insert a catheter into the groin.

Key facts about the radiation dose of CT Coronary Angiography

As in the case of cardiac catheterization, x-rays are used during CT Coronary Angiography, i.e. the examination is associated with a radiation dose. The radiation dose varies depending on the problem. In many cases, a dose used during CT Coronary Angiography can be below 1 mSv. This radiation dose is usually lower than the natural environmental radiation exposure. This consists mainly of the natural background radiation as well as of radiation produced by construction materials, and makes up an average dose of about 2.5 mSv per year. In some cases - for example when travelling by plane - it may even be significantly higher.

Who is the examination for?

  • For patients with so-called „moderate, possibly even lower pre-test likelihood“ of developing coronary artery disease. Please contact us to find out whether you need a CT Angiography.
  • For patients undergoing coronary artery bypass surgery. In order to evaluate the condition of the bypass vessels, CT Angiography is now a good alternative to a cardiac catheterization.
  • For patients for whom the patency of a coronary artery must be verified after implantation of stents.

Advantages of CT Coronary Angiography

  • In contrast to cardiac catheterization, no catheter is inserted into the artery.
  • The examination is performed significantly faster than the cardiac catheterization.
  • „Soft plaques“ that have not yet led to narrowing of the coronary arteries can be detected only with CT Coronary Angiography.

We perform this examination with the help of a dual-source multi-slice CT (two-tube system). The most advanced equipment is available at the Radiologie am Rathausmarkt - the Siemens Force. The Force has two flash x-ray tubes that rotate simultaneously around the patient’s body, achieving the highest temporal resolution with the lowest dose.

CT Coronary Calcium Scoring

CT Coronary Calcium Scoring

The calcification of the coronary arteries can be detected with the help of CT Coronary Calcium Scoring. This is a sign of cardiovascular disease, since there is no lime in healthy heart vessels. With the help of computer-assisted analysis and on the basis of standardized criteria, we can evaluate whether the coronary vessels are calcified and if so, to which extent.

Based on compared values gained from a large group of patients, the risk of the presence of coronary artery disease can be estimated depending on sex and age. If there are no calcifications, coronary artery disease can be ruled out with a probability of 95 percent. If the examination shows a great amount of coronary calcium, there is a possibility that coronary artery disease is present. In this case further cardiological diagnostics are required. In the long term, the disease’s progress can be observed with the help of CT Coronary Calcium Scoring and the success of corresponding therapeutic interventions can be ensured.

Who is the examination for?

For patients who do not have typical symptoms, but who have risk factors such as heart attacks in their family history, diabetes, obesity or smoking, even if a cardiac catheterization has not been indicated yet.

Advantages of CT Coronary Calcium Scoring

  • The examination is painless and takes only a few minutes.
  • No contrast material is required.
  • The disease’s progress and the success of the relevant therapeutic interventions can be observed in the long-term.

Key facts about the radiation dose of CT Coronary Calcium Scoring

X-rays are used during the CT Coronary Calcium Scoring. The resulting radiation dose is significantly lower than 1 mSv. Therefore, the radiation exposure is significantly lower than that from the environment which everyone is exposed to over years. The latter consists mainly of natural background radiation and radiation produced by construction materials and amounts to about 2.5 mSv per year on average. In particular cases - for example when travelling by plane - it may even be significantly higher.

We perform this examination with the help of a dual-source multi-slice CT (two-tube system). The most up-to-date device, the Siemens Force, is available at the Radiologie am Rathausmarkt. The Force has two x-ray tubes that rotate simultaneously around the patient’s body, achieving the highest temporal resolution with the lowest dose

Low-dose CT of the Lung

Low-dose CT of the Lung

Nowadays, lung cancer can be diagnosed reliably and in a very gentle way, using so-called low-dose computed tomography. With the help of modern technology, tumours with a diameter of only a few millimetres can be detected.

The process is very suitable as an early recognition method for patients with an increased risk of lung cancer (e.g. heavy smokers). Initial studies show that many very small (< 20 mm), lung tumours can be diagnosed, which are easily operable and therefore curable.

In addition to its use as an early detection procedure for lung cancer, depending on the question to be answered and the patient’s physique, we also use low dose CT of the lung to clarify illnesses which affect the lungs only (i.e. asbestosis, sarcoidosis), and to look for tumours in high-risk patients.

Advantages and disadvantages of lung cancer early recognition with computed tomography

  • The low-dose CT in multilayer technology is considered to be the most sensitive method for early recognition of lung cancer.
  • The low-dose CT increases the chances of recovery since lung tumours can be detected in very early stages.
  • With the help of low-dose CT, lung cancer tumours that „hide“ behind vessels and diaphragm domes can also be recognized. The conventional methods do not detect these tumours.
  • With the help of computer-assisted analysis of the CT data we perform as a standard measure, the size of a tumour can be accurately measured and the smallest changes can be detected. By means of a CT follow-up examination at three to six month intervals, benign tissue changes can be differentiated from malignant ones based on a lack of growth.
  • The introduction of new detector systems makes it possible to perform lung examinations with a very low radiation dose. With the multi-slice CT technology, the radiation exposure is approximately 0.2 to 0.6 mSv. By way of comparison: every citizen in Germany is, on average, exposed to a radiation dose of about 2.5 mSv from the environment every year.
Virtual CT Colonoscopy

Virtual CT Colonoscopy

The virtual colonoscopy, also known as CT Colonography, is a new high-tech process used to look at the inside of the colon and examine it for changes. Colon polyps and tumours starting from 8 mm in size can be detected early with the help of this procedure.

The Virtual Colonoscopy has many benefits compared to conventional colonoscopy. For example, an endoscope does not have to be inserted into the colon. The „journey“ through the colon is simulated on a computer monitor.

First of all, detailed two-dimensional images are created with the help of computed tomography. These virtual cross-sectional images are then converted into a three dimensional view of the intestine by a special computer program which allows the physician to make a virtual tour of the entire large intestine. The examination is therefore much more comfortable than conventional colonoscopy; it is painless and does not require sedation.

According to previous findings, the method is as reliable as the conventional colonoscopy when detecting polyps or bowel cancer in sizes of more than eight millimetres. A disadvantage is that the doctor cannot take a tissue sample (biopsy) during the examination. If there are suspicious changes in the intestine, a regular colonoscopy should be performed additionally in each case. However, if no pathological changes were found during the virtual colonoscopy, no further action is required.

Advantages and disadvantages of Virtual CT-Colonoscopy

  • During the Virtual Colonoscopy, no endoscope is inserted into the interior of the intestine.
  • The examination is much more comfortable than the conventional colonoscopy.
  • CT-Colonoscopy is painless and requires no sedation.
  • According to current knowledge, the method is as reliable as the conventional colonoscopy to detect polyps or cancers of more than 8 mm in size.
  • The physician cannot take a tissue sample (biopsy) during the examination. If there are suspicious changes in the intestine, a normal colonoscopy must be performed in any case.
  • The examination uses x-rays. The radiation dose is about 5-6 mSv. Thus, the radiation is slightly higher than that which people are exposed to from the environment every year. This is, on average, about 2.5 mSv per year. In special cases - for example when traveling by plane - it may even be much higher.
Dual-Energy CT (Gout)

Dual-Energy CT (Gout)

The Dual-Energy-CT requires the application of a dual source multilayer CT (two tube system). At the Radiologie am Rathausmarkt, the most up-to-date device, the Definition Flash of Siemens, is available.

The Definition Flash has two x-ray tubes that rotate simultaneously around the patient’s body. 

By using different tube voltages (dual-energy), calcifications and calcified changes can be detected precisely (gout) or stones consisting purely of uric acid can be differentiated from other or mixed stones (kidney stones). Administering contrast agents is not necessary.

Dual-Energy CT (Kidney)

Dual-Energy CT (Kidney)

The Dual-Energy-CT requires the application of a dual source multilayer CT (two tube system). At the Radiologie am Rathausmarkt, the most up-to-date device, the Definition Flash of Siemens, is available.

The Definition Flash has two x-ray tubes that rotate simultaneously around the patient’s body. 

By using different tube voltages (dual-energy), calcifications and calcified changes can be detected precisely (gout) or stones consisting purely of uric acid can be differentiated from other or mixed stones (kidney stones). Administering contrast agents is not necessary.

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