What are diagnostic devices

Devices and diagnostics

Angiography

Angiography is an X-ray image of the vessels. If the venous system is examined, one speaks of one Venographywhile examining the arteries as Arteriography referred to as.

Arteriography

A Arteriography is usually performed through the inguinal or arm artery. Under local anesthesia, the vascular puncture and probing is almost painless for the patient. A thin-lumen catheter is advanced into the arteries to be visualized and then X-ray contrast medium is given into the arteries. In this way, diseases of the arteries can be presented morphologically as well as functionally and their severity can be assessed.

Diseases of the arteries are reliable means Magnetic resonance imaging diagnose. Arteriography for purely diagnostic purposes is therefore rarely used today. If you suffer from a disease of the arteries, we will be happy to advise you on all questions relating to vascular diagnostics.

Three device variants

A multifunctional workstation, which is suitable for both angiography and fluoroscopic examinations. On it, the patient can be tilted from the horizontal to the vertical position, e.g. to examine the esophagus and stomach (swallowing porridge), the intestines (contrast enema) or the veins (venography). In addition, gastric bandings can be adjusted on this device by patients who come to us via the obesity outpatient department of the Clinic for General and Visceral Surgery at the Northwest Hospital.

An angiographywhich, due to its image detail, is particularly suitable for cardiological examinations as well as for examinations and measures that take place on the patient locally, such as external bile duct drainage (PTCD), embolization (TACE), peripheral catheters (PICC) and the treatment of arterial constrictions (stenoses) .

A flat-panel angiography system, which, in addition to the usual angiographic examinations and measures, offers the possibility of performing a computed tomography by rotating the C-arm around the patient from the head end under X-ray fluoroscopy and generating a sectional image from the three-dimensional data set obtained. This technique is helpful, for example, in the context of an embolization, to document the catheter position and the area supplied from here and in this way to ensure that the desired organ area is treated in a targeted manner.

Computed tomography / CT

It differs fundamentally from the projection radiographic process, because it generates sectional images. The patient drives on an examination table through a gantry open on all sides, in which the X-ray tube and a large number of detectors (recording units) are attached. While the table is moving, the X-ray tube and the detectors rotate around the patient and create superimposed images of the body volume being examined. This is followed by a complicated recalculation of the digitally created "raw data" so that the examined body region can be displayed in all conceivable spatial levels.

Computed tomography is one of the most important radiological examination procedures. Images of the whole body can be generated within a few seconds, e.g. as part of an oncological follow-up examination. However, the patient has to plan about ten minutes for an average examination, which includes the discussion, putting the patient on and off and the most often necessary administration of contrast medium via an arm vein. Computed tomography is extremely important both in emergency diagnostics for multiple trauma patients and for many elective questions in medicine.

Different CT protocols tailored to the problem are used, which not only allow organs such as the lungs and liver, but also vessels and bones to be reliably assessed. Computed tomography has become indispensable in some areas of medicine. One example is oncology, which can only correctly classify the spread of a tumor and assess the success of tumor therapy using CT images.

The radiation exposure - as low as possible

The high radiation exposure of computed tomography is repeatedly discussed in the media. Therefore, before performing a computed tomography, we weigh up in each individual case whether the examination is absolutely necessary and, if possible, shift upcoming examinations to ultrasound and magnetic resonance tomography.

When we perform computed tomography in our institute, so-called low-dose programs are used thanks to the latest device technology. This is understood to be a dose modulation, which means that the computed tomograph automatically adjusts the required dose through continuous analysis of the body region to be examined. This means that a lungs with a high air content can be examined with a significantly lower dose, such as the abdomen, for example, where solid organs require more dose for a reliable diagnosis. In principle, we only use the X-ray energy that is absolutely necessary to answer a question!

You are welcome to contact us if you have any questions about computed tomography and clarify with us whether such an examination is indicated in an individual case or not.

Magnetic resonance imaging / MRI

Magnetic resonance tomography is a cross-sectional imaging method which, thanks to its high soft tissue contrast and tissue-specific examination techniques, is very important for the diagnosis of tumors and non-tumorous changes. Where computed tomography sometimes reaches the limits of its informative value, magnetic resonance tomography can provide clarification and vice versa. A whole range of diseases can be diagnosed without doubt with the help of magnetic resonance tomography, excluded or at least narrowed down. This saves the patient from having to clarify by means of a puncture or an operation.

Precise recordings without exposure to radiation

Magnetic resonance tomography uses a strong magnetic field to produce precise images of the body without X-rays, which is a major advantage when examining children and pregnant patients. Even with frequent repeat examinations, e.g. as part of the follow-up care of a tumor, magnetic resonance imaging can have considerable advantages for the patient.

Restrictions for performing magnetic resonance imaging exist for prosthesis wearers, patients with cardiac pacemakers and electronic implants in other locations. A distinction must also be made here between different field strengths. For example, certain foreign materials are approved for a field strength of 1.5 Tesla, while this does not apply to three Tesla devices.

MRI - very important for whole-body examinations

Magnetic resonance imaging is undoubtedly of particular importance for examinations of the breast, liver, central nervous system (CNS), joints, bones and soft tissues. Magnetic resonance imaging is also a basic examination for patients with symptomatic vascular disease.

Due to the lack of radiation exposure, we offer full-body examinations as preventive services. For such an examination, however, you have to plan up to 40 minutes at the table. In individual cases, we will be happy to advise you on whether or not we can perform magnetic resonance imaging, depending on the question, and give you important information about the procedure of the examination.

X-rays

An X-ray of the lungs, joint, or bone is a common exam. The target region is photographed in two spatial planes that are perpendicular to one another, which is why one also speaks of projection radiography in technical terminology. With the help of X-rays, the radiologist can diagnose or rule out diseases very reliably. Projection radiography helps in many ways to unequivocally assign a symptom from which the patient is suffering to a disease. In those cases where this does not succeed, further examinations are used. These then serve to substantiate a suspected diagnosis or to further classify the diagnosed disease in terms of its severity and extent.

Careful consideration before every x-ray

Basically, before every x-ray, we weigh up whether we can answer the question with other examination methods. The radiologist is your contact to discuss the possibilities of alternative examination procedures with you and always has the goal in mind to keep the radiation exposure of the patient as low as possible.

The fluoroscopy

Fluoroscopic examinations serve to detect or exclude diseases that cannot be adequately diagnosed with an X-ray image alone. As a rule, radiopaque contrast media are required for fluoroscopic examinations, which are swallowed by the patient or introduced into the large intestine through an intestinal tube. The radiologist then follows the act of swallowing or the transport of the radiopaque contrast agent within the intestine, e.g. to check the tightness of an anastomosis that was surgically created.

Detection and localization of changes

With the help of fluoroscopic examinations, stones in a bile duct can be detected or inflammatory changes in the intestinal wall as well as tumorous constrictions of the intestine can be localized. Fluoroscopy methods are also used in vascular diagnostics. By injecting a radiopaque contrast agent containing iodine into the veins of the body, a vein thrombosis can be excluded or its extent can be described.

Individual examination 

Fluoroscopic examinations are based on the patient's previous illnesses and are individually tailored to the respective question. They are usually painless and not very stressful for the patient. We will be happy to inform you about the questions for which fluoroscopy makes sense and for which questions other methods are better used.

The mammography

Breast cancer is one of the most common types of cancer in women. Mammography is used for prevention and clarification of unclear findings. Mammography is a component of breast diagnostics and, together with a thorough clinical examination and sonography of the breast, leads to a high detection rate of carcinomas. In the case of certain types of carcinoma and risk constellations, magnetic resonance imaging of the breast is also recommended, since magnetic resonance imaging can even reliably detect occult carcinomas.

Modern digital mammography device

At the Central Institute for Radiology and Neuroradiology, we operate a modern digital mammography device with which we can keep the radiation exposure for the mammary gland as low as possible. We would be happy to advise you on the indications for mammography and, if necessary, replacement examinations, such as magnetic resonance tomography.

The sonography / ultrasound recording

The Central Institute for Radiology and Neuroradiology operates a mobile, high-performance ultrasound device with which ultrasound examinations of the neck, thorax, mammary gland, abdomen and pelvis are carried out.

Sound waves are converted into sectional images

The principle of sonography is based on sound waves emitted by the ultrasound head, which, depending on the tissue composition, are reflected and in turn received by the ultrasound head. A computer converts the recorded sound waves into image information and creates sectional images.

Basic examination to control minimally invasive interventions

Sonography is a basic examination for the detection or exclusion of a large number of diseases and is of great importance in the hands of the experienced examiner. Due to the strongly examiner-dependent informative value, further examinations are usually necessary to classify a disease. Sonography is very important for the control of minimally invasive interventions and is used regularly, for example, to puncture blood vessels.