MRT ersetzt Prostatabiopsie

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The invention discloses a biopsy needle system, comprising: - a hollow needle comprising a first material; A first stylet having a sharp tip and insertable into the hollow needle such that the tip and an opposite end of the first stylet are opposed Protruding ends of the hollow MRT ersetzt Prostatabiopsie when the hollow needle is in a patient, wherein the sharp tip is adapted to divide tissue; characterized by an imaging stylet having a MRT ersetzt Prostatabiopsie material and insertable into the hollow needle when the hollow needle is in a patient, the second material being a material that has been MRI-imaged can be displayed well.

The present invention relates to a biopsy needle for MR-guided biopsy for use in magnetic resonance tomographs of any magnetic field strength, in particular with a magnetic field strength of 3 Tesla and more.

In MR-guided biopsy, a biopsy needle is moved by a physician towards the lesion. At predetermined intervals, imaging by means of a magnetic resonance tomograph verifies that the biopsy needle is moved to the lesion. If necessary, the physician can make corrections to ensure that the needle is moved to the lesion.

In a magnetic resonance tomograph, MRT ersetzt Prostatabiopsie of hydrogen atoms are generated under the influence of magnetic fields or alternating magnetic fields in interaction with RF radiation. The functioning of a magnetic resonance tomograph is known to the person skilled in the art and need not be explained further here.

The first MRT ersetzt Prostatabiopsie resonance tomographs had a magnetic field of 0. Successively magnetic resonance tomographs of higher magnetic field strength came onto the market. Magnetic resonance imagers with a magnetic field strength of 1. The magnetic resonance tomographs with a magnetic field strength of 1. There are also magnetic resonance tomographs with a magnetic field strength of 7 Tesla.

The needles MRT ersetzt Prostatabiopsie approved for MR guided biopsy are made of titanium or include titanium coated portions. These needles are MRI compatible up to a magnetic field strength of 1.

However, even with these needles and at a magnetic field strength of 1. A biopsy needle of the prior art for MR-guided prostate biopsy comprises a hollow needle, which is also referred to as MRT ersetzt Prostatabiopsie coaxial portion. The biopsy needle further comprises a so-called stylet with a sharp point, which is inserted into MRT ersetzt Prostatabiopsie needle during use and is finally used for puncture.

Both the hollow needle and the mandrin are, as previously mentioned, made of titanium or coated with titanium. Titanium is a non-ferromagnetic material. During the MR-guided biopsy, the patient lies on the table of the magnetic MRT ersetzt Prostatabiopsie tomograph. For example, so-called local coils may be arranged on the patient. Before the puncture, the patient is moved into the magnetic resonance tomograph and imaging is performed using RF signals and gradients.

After imaging, the patient MRT ersetzt Prostatabiopsie moved out of the magnetic resonance tomograph while the patient remains on the table of the magnetic resonance tomograph. The area MRT ersetzt Prostatabiopsie which the puncture is to be performed is locally anesthetized and followed by a skin incision incisionso that the hollow needle can penetrate into the patient.

The physician inserts the cannula and stylet into the patient with the patient outside the MRI scanner. When the physician has inserted the cannula and stylet a predetermined distance into the patient, the physician can perform another imaging with the magnetic resonance tomograph.

For this purpose, the patient is moved into the magnetic resonance tomograph or in the region of its homogeneous magnetic field, after which the imaging is performed by means of RF signals and gradient signals. The doctor can then continue to insert the cannula MRT ersetzt Prostatabiopsie stylet into the patient. The sequence of imaging and insertion of the hollow needle with the stylet can be repeated until the hollow needle has finally arrived at the lesion or at the point to be punctured.

Once the hollow needle has arrived at the point to be punctured, which can be verified by the imaging, the stylet is removed and the hollow needle is fixed, for example by means of plaster. Subsequently, a biopsy needle for tissue removal is inserted into the hollow needle MRT ersetzt Prostatabiopsie the hollow needle to remove samples. MR-guided biopsy is known to the person skilled in the art and will not be described MRT ersetzt Prostatabiopsie greater detail herein for the sake of brevity.

Magnetic resonance tomographs with a magnetic field strength of 1. Magnetic resonance tomographs with a magnetic field strength of 3 Tesla use a high-frequency signal with The invention has as its object to provide an MRT ersetzt Prostatabiopsie biopsy needle system for MR-guided biopsy. The object of the invention is achieved by a biopsy needle system according to claim 1, a hollow needle according to claim 8 and an imaging mandrin according to claim The dependent MRT ersetzt Prostatabiopsie describe preferred embodiments.

This can ensure that the hollow needle is not heated by the high-frequency signal. As a result, MRT ersetzt Prostatabiopsie unpleasant side effects occur to MRT ersetzt Prostatabiopsie patient during MR-guided biopsy.

Burns can also be avoided. In addition, artifacts can be avoided. Particularly suitable is hard plastic. The object of the invention is also achieved by an imaging mandrin which can be introduced into the previously described hollow needle, wherein the stylet has MRT ersetzt Prostatabiopsie material that can be well imaged by means of MR imaging. The invention now proposes, in addition to a first stylet with a sharp tip, which is MRT ersetzt Prostatabiopsie for insertion of the hollow needle and for biopsy, to provide another MRT ersetzt Prostatabiopsie as an imaging stylet, which has a material that can be well imaged by means MRT ersetzt Prostatabiopsie MR imaging.

For example, the hollow needle can be inserted into the body MRT ersetzt Prostatabiopsie a patient when the first stylet with the sharp tip protrudes from the hollow needle. To check the position of the hollow needle in the patient's body, the physician can remove the first stylet with the sharp tip from the hollow needle prior to imaging and insert the imaging stylet with the MR imaging material.

Subsequently, imaging by the magnetic resonance tomograph can take place. Based on the results of this imaging, the physician can check whether the hollow needle is in the right place.

If MRT ersetzt Prostatabiopsie hollow needle is in the correct location, it can be ensured that only tissue is removed from a lesion and not healthy tissue. The imaging stylet may include plastic. A cylindrical portion of the imaging stylet may comprise plastic, wherein the cylindrical portion is adapted to be inserted into the hollow needle. A gel is a dispersion that may have a liquid. The gel may be a medical gel, for example an ultrasound gel.

The gel may be a hydrogel or lipogel. A hydrogel can have water. A lipogel may comprise vegetable oil, synthetic MRT ersetzt Prostatabiopsie or mineral oil. The invention also relates to a biopsy needle system having a hollow needle, a first stylet with MRT ersetzt Prostatabiopsie sharp tip, and an imaging stylet. The imaging stylet has a second material and is insertable into the hollow needle when the hollow needle is in a patient.

The second material is a material that can be well imaged using MR imaging. By means of imaging with a T1 weighted sequence, contrast agent containing gadolinium can be well imaged.

With a slightly lower intensity, oil and fish oil can also be well imaged with a T1-weighted sequence. Imaging with a T2-weighted sequence can accurately map oil, fish oil, and water.

With a slightly lower intensity, a T2-weighted sequence can also be used to image contrast media containing gadolinium. In MR imaging, oil and fish oil can be represented by a sequence of a T2-weighted sequence, a T1-weighted sequence, and a T1-FS weighted sequence, where the abbreviation FS means "Fat MRT ersetzt Prostatabiopsie and the order the sequences is arbitrary.

MRT ersetzt Prostatabiopsie agent can be characterized by a consequence a T1-weighted sequence, a T1-FS weighted sequence and a T2-weighted sequence are shown, wherein the sequence of the sequences is also arbitrary.

The hollow needle includes a cylindrical portion adapted to be inserted into a patient. The imaging stylet has plastic. The imaging stylet has no sharp tip at the MRT ersetzt Prostatabiopsie end that is inserted into the patient and the hollow needle. The distal end of the imaging mandrin can be dull. The invention will now be MRT ersetzt Prostatabiopsie in more detail and non-restrictively MRT ersetzt Prostatabiopsie reference MRT ersetzt Prostatabiopsie the accompanying drawings, which show an exemplary embodiment of the invention.

The hollow needle includes MRT ersetzt Prostatabiopsie cylindrical area Hollow inside, a distal opening which is inserted into a patient and a proximal handle areawhich protrudes from the patient in use. The cross section of the cylindrical area is round and the diameter of the cylindrical portion is for example MRT ersetzt Prostatabiopsie prostate biopsy about 1.

MRT ersetzt Prostatabiopsie length of the hollow needle For example, in prostate biopsy, it may be about 16 cm to about 20 cm or more. It is understood that a hollow needle for the biopsy of MRT ersetzt Prostatabiopsie organs may have other dimensions. This MRT ersetzt Prostatabiopsie ensure that the hollow needle and in particular the cylindrical area not acting as an antenna and the cylindrical area the hollow needle not heated. As a result, unwanted side effects by MR imaging by MRT ersetzt Prostatabiopsie the cylindrical area up to the patient's burns avoided.

The first stylet includes a cylindrical areaat its distal end a sharp point and at its proximal end a handle is arranged. For example, the stylet has a length of about 16 cm to about 20 cm or more in prostate biopsy. The cylindrical area For example, in prostate biopsy, the first stylet has a diameter of about 1.

It is understood that a first stylet for the biopsy of other organs may have other dimensions. The cylindrical area and the top may be made of titanium or coated with titanium. Such mandrins are approved for biopsy and the doctors have experience in using such a stylet. Consequently, the actual puncture can proceed as the doctors are used to. The doctor may be introducing the hollow needle and the first stylet by means of the proximal handle the hollow needle and the proximal handle of the first stylet Taxes.

At the cylindrical area the hollow needle are marks with a smaller pitch and markers attached with a larger pitch. A lot of marks with the smaller pitch fall with a marker with the larger division together.

The mark with the smaller pitch may be 1 cm from the next mark spaced apart with the smaller pitch. A mark with the larger pitch may be 5 cm from the next mark with the larger pitch be spaced.

Based on the markings with the smaller pitch and marks With the larger division, the doctor can examine how deep the hollow needle is or the cylindrical area the hollow needle was inserted into the body. The doctor leads the hollow needle with the inserted first stylet where the top of the first stylet from the MRT ersetzt Prostatabiopsie opening the hollow needle protrudes over a predetermined distance in the patient.

Subsequently, the MRT ersetzt Prostatabiopsie can use MR imaging to check if the hollow needle MRT ersetzt Prostatabiopsie moved in the right direction. For this purpose, imaging is performed by means of a magnetic resonance tomograph.

Before imaging, the first stylet becomes with the sharp tip from the patient and the hollow needle removed and it becomes an imaging mandrin in the hollow needle introduced.

The imaging stylet includes a cylindrical portiona handlewhich is at the proximal end of the cylindrical area MRT ersetzt Prostatabiopsie arranged, and a distal end at the distal end of the cylindrical area is arranged.

Inside the cylindrical area can become a cavity located, which may also be cylindrical and from the blunt end MRT ersetzt Prostatabiopsie distal end towards the handle extends. The cylindrical area can be made of plastic.

The cavity extends as close as possible to the distal end so that it can be better judged from the imaging, where the hollow needle located in the body of a patient. By removing the first stylet from the hollow needle and inserting the imaging stylet In the hollow needle before imaging can be ensured that the patient is not affected by a warming stylet is impaired and still the position of the hollow needle due to the introduced imaging mandrin can be well located.

Once the doctor has the position of the hollow needle In the body of a patient has checked, the imaging mandrin again from the hollow needle be removed.